Showing papers by "Tata Memorial Hospital published in 2007"

Pancreaticojejunostomy versus pancreaticogastrostomy: systematic review and meta-analysis.

Abstract: Objective Pancreaticojejunostomy (PJ) and pancreaticogastrostomy (PG) are the commonly preferred methods of anastomosis after pancreaticoduodenectomy (PD). The ideal choice of anastomosis remains a matter of debate. Data Sources Articles published until end of March 2006 comparing PJ and PG after PD were searched. Study Selection Two reviewers independently assessed quality and eligibility of the studies and extracted data for further analysis. Meta-analysis was performed with a random-effects model by using weighted odds ratios. Data Extraction and Synthesis Sixteen articles were included; meta-analysis of 3 randomized controlled trials (RCT) revealed no significant difference between PJ and PG regarding overall postoperative complications, pancreatic fistula, intra-abdominal fluid collection, or mortality. On the contrary, analysis of 13 nonrandomized observational clinical studies (OCSs) showed significant results in favor of PG for the outcome parameters with a reduction of pancreatic fistula and mortality in favor of PG. Conclusions All OCSs reported superiority of PG over PJ, most likely influenced by publication bias. In contrast, all RCTs failed to show advantage of a particular technique, suggesting that both PJ and PG provide equally good results. This meta-analysis yet again highlights the singular importance of performing well-designed RCTs and the role of evidence-based medicine in guiding modern surgical practice.

Integrative analysis of genomic aberrations associated with prostate cancer progression

Abstract: Integrative analysis of genomic aberrations in the context of trancriptomic alterations will lead to a more comprehensive perspective on prostate cancer progression. Genome-wide copy number changes were monitored using array comparative genomic hybridization of laser-capture microdissected prostate cancer samples spanning stages of prostate cancer progression, including precursor lesions, clinically localized disease, and metastatic disease. A total of 62 specific cell populations from 38 patients were profiled. Minimal common regions (MCR) of alterations were defined for each sample type, and metastatic samples displayed the most number of alterations. Clinically localized prostate cancer samples with high Gleason grade resembled metastatic samples with respect to the size of altered regions and number of affected genes. A total of 9 out of 13 MCRs in the putative precursor lesion, high-grade prostatic intraepithelial neoplasia (PIN), showed an overlap with prostate cancer cases (amplifications in 3q29, 5q31.3-q32, 6q27, and 8q24.3 and deletions in 6q22.31, 16p12.2, 17q21.2, and 17q21.31), whereas postatrophic hyperplasia (PAH) did not exhibit this overlap. Interestingly, prostate cancers that do not overexpress ETS family members (i.e., gene fusion-negative prostate cancers) harbor differential aberrations in 1q23, 6q16, 6q21, 10q23, and 10q24. Integrative analysis with matched mRNA profiles identified genetic alterations in several proposed candidate genes implicated in prostate cancer progression.

Ectopic thyroid cancer.

Abstract: Ectopic thyroid tissue may be encountered anywhere from the foramen caecum to the lower neck. It is rarely seen in the mediastinum. True malignant transformation in ectopic thyroid tissue is extremely rare. Such a malignancy is virtually always diagnosed after surgical excision of the lesion at pathological examination. We report on an extremely rare case of true mediastinal thyroid cancer in a 45-year-old woman. The clinicopathologic features and diagnosis of the lesion, with regard to its mediastinal location are discussed.

Pancreatic fistula after pancreaticoduodenectomy: the impact of a standardized technique of pancreaticojejunostomy

Abstract: The leading cause for morbidity and mortality after pancreaticoduodenectomy is a pancreatic anastomotic leak and fistula The two most commonly performed anastomoses after pancreaticoduodenectomy are pancreaticogastrostomy (PG) and pancreaticojejunostomy (PJ) The role of standardization on outcomes after pancreaticoduodenectomy has not been sufficiently addressed The goal is to study the impact of a standardized technique of pancreatic anastomosis (PJ) after pancreaticoduodenectomy in a tertiary referral cancer teaching hospital A single-institution database was analyzed over 15 years The entire data were subdivided into two periods, viz, period A (1992 to 2001), when PG (dunking) was predominantly used, and period B (2003–2007), when a standardized technique of PJ (duct to mucosa) was employed There were 144 pancreaticoduodenectomies performed during period A with a pancreatic fistula rate of 16% During period B, 123 pancreaticoduodenectomies were performed with a pancreatic fistula rate of 32% (p < 00005) It appears that a standardized approach to the pancreatic anastomosis and a consistent practice of a single technique can help to reduce the incidence of complications after pancreaticoduodenectomy

Primary diffuse large B-cell lymphoma of the tonsil: is a higher radiotherapy dose required?

Abstract: BACKGROUND. The purpose was to evaluate the prognostic factors and treatment outcome of Indian patients with primary diffuse large B-cell lymphoma (DLBCL) of the tonsil treated at a single institution. METHODS. In all, 121 patients with DLBCL of the tonsil, treated at the Tata Memorial Hospital, Mumbai, India, from January 1990 to December 2002, were included. The median age was 45 years and the majority of patients (68%) were males. Systemic symptoms were present in 12% of patients; 28% presented with stage I and 67% had stage II disease. Treatment consisted of a combination of chemotherapy (CTh) and radiotherapy (RT) for the majority of patients (69.4%). Among those receiving RT, 64% received an RT dose of ≥45 Gy. RESULTS. After a median follow-up of 62 months, disease-free survival (DFS) and overall survival (OS) were 66.4% and 81.6%, respectively. Significant prognostic factors included: WHO performance score ≥2 (OS: 72.1% vs 95.6%, P = .016), bulky tumors (OS: 68.5% vs 86.9%, P = .001), presence of B-symptoms (OS: 36.7% vs 79.6%, P < .001), and Ann Arbor stage. On multivariate analysis; WHO performance score ≥2 (hazard ratio [HR], 4.27; 95% confidence interval [CI], 1.20–15.12), and B symptoms (HR, 6.27; 95% CI, 2.38–16.48), retained statistical significance. CTh + RT resulted in a significantly better outcome than those treated with CTh alone (OS: 85.7% vs 70.7%, P = .008). The complete response (P = .053), DFS (P = .039), and OS (P = .014) rates were significantly better for patients receiving an RT dose ≥45 Gy. CONCLUSIONS. Tumor bulk, WHO performance score, the presence of B symptoms, and Ann Arbor stage significantly influence outcome. A combined modality treatment, consisting of CTh and RT (with an RT dose of ≥45 Gy), results in a satisfactory outcome in patients with this uncommon neoplasm. Cancer 2007; 110:816–23. © 2007 American Cancer Society.

Phenotype frequencies of autosomal minor histocompatibility antigens display significant differences among populations

Abstract: Minor histocompatibility (H) antigens are allogeneic target molecules having significant roles in alloimmune responses after human leukocyte antigen-matched solid organ and stem cell transplantation (SCT). Minor H antigens are instrumental in the processes of transplant rejection, graft-versus-host disease, and in the curative graft-versus-tumor effect of SCT. The latter characteristic enabled the current application of selected minor H antigens in clinical immunotherapeutic SCT protocols. No information exists on the global phenotypic distribution of the currently identified minor H antigens. Therefore, an estimation of their overall impact in human leukocyte antigen-matched solid organ and SCT in the major ethnic populations is still lacking. For the first time, a worldwide phenotype frequency analysis of ten autosomal minor H antigens was executed by 31 laboratories and comprised 2,685 randomly selected individuals from six major ethnic populations. Significant differences in minor H antigen frequencies were observed between the ethnic populations, some of which appeared to be geographically correlated.

Smokeless tobacco and increased risk of hypopharyngeal and laryngeal cancers: a multicentric case-control study from India.

Abstract: Hypopharyngeal and laryngeal cancers are among the most common cancers in India. In addition to smoking, tobacco chewing may be a major risk factor for some of these cancers in India. Using data from a multicentric case-control study conducted in India that included 513 hypopharyngeal cancer cases, 511 laryngeal cancer cases and 718 controls, we investigated smoking and chewing tobacco products as risk factors for these cancers. Bidi smoking was a stronger risk factor compared to cigarette smoking for cancer of the hypopharynx (OR(bidi) 6.80 vs. OR(cig) 3.82) and supraglottis (OR(bidi) 7.53 vs. OR(cig) 2.14), while the effect of the 2 products was similar for cancer of the glottis (OR(bidi) 5.32 vs. OR(cig) 5.74). Among never-smokers, tobacco chewing was a risk factor for hypopharyngeal cancer, but not for laryngeal cancer. In particular, the risk of hypopharyngeal cancer increased with the use of Khaini (OR 2.02, CI 0.81-5.05), Mawa (OR 3.17, CI 1.06-9.53), Pan (OR 3.34, CI 1.68-6.61), Zarda (OR 3.58, CI 1.20-10.68) and Gutkha (OR 4.59, CI 1.21-17.49). A strong dose-response relationship was observed between chewing frequency and the risk of hypopharyngeal cancer (p(trend) < 0.001). An effect of alcohol on cancer of the hypopharynx and supraglottis was observed only among daily drinkers (OR 2.22, CI 1.11-4.45 and OR 3.76, CI 1.25-11.30, respectively). In summary, this study shows that chewing tobacco products commercially available in India are risk factors for hypopharyngeal cancer, and that the potency of Bidi smoking may be higher than that of cigarette smoking for hypopharyngeal and laryngeal cancers.

Treatment of giant cell tumor of bone: Current concepts.

Abstract: Giant cell tumor (GCT) of bone though one of the commonest bone tumors encountered by an orthopedic surgeon continues to intrigue treating surgeons. Usually benign, they are locally aggressive and may occasionally undergo malignant transformation. The surgeon needs to strike a balance during treatment between reducing the incidence of local recurrence while preserving maximal function.Differing opinions pertaining to the use of adjuvants for extension of curettage, the relative role of bone graft or cement to pack the defect and the management of recurrent lesions are some of the issues that offer topics for eternal debate.Current literature suggests that intralesional curettage strikes the best balance between controlling disease and preserving optimum function in the majority of the cases though there may be occasions where the extent of the disease mandates resection to ensure adequate disease clearance.An accompanying treatment algorithm helps outline the management strategy in GCT.

Uptake characteristics of fluorodeoxyglucose (FDG) in deep fibromatosis and abdominal desmoids: potential clinical role of FDG-PET in the management

Abstract: In this preliminary report, we explore the uptake pattern of fluorodeoxyglucose (FDG) in fibromatosis and hypothesize the potential clinical role of FDG-positron emission tomography (PET) in the management of this benign but locally aggressive heterogeneous group of soft-tissue tumours. Five patients were studied (two men and three women, age range 23–35 years), among whom were three cases of deep musculoskeletal fibromatosis, one of abdominal fibromatosis (abdominal desmoid) associated with familial adenomatous polyposis (Gardner's syndrome) and one case of both deep musculoskeletal fibromatosis and abdominal desmoid. The FDG uptake in the lesions was heterogeneous in four cases and relatively homogeneous in one case. The uptake ranged from low to moderate grade with areas or foci of relatively avid FDG uptake. The maximum standardized uptake value (SUVmax) observed was up to 4.7; the avidity probably related to the biological aggressiveness and tendency for recurrence, characteristic of fibromatosis. A ...

Giant cell tumor of bone in children and adolescents.

Abstract: Background: There are very few series that document giant cell tumor of bone (GCT) in the immature skeleton, and the reported incidence in literature varies from 1.8% to 10.6%. The purpose of this study was to document the incidence of GCT in patients with open physis in the Indian population and study the course of the disease with respect to its adult counterpart to see if it behaved any differently. Methods: Between January 2000 and December 2005, 17 (6%) of 285 surgically treated patients with histologically proven GCT had open physis on imaging. Treatment was directed toward local control without sacrificing joint function, with most lesions treated with intralesional curettage. Results: Fourteen (82%) patients were girls. The most common site was around the knee (53%). Of 15 lesions in tubular bones, 13 were epiphysiometaphyseal in location. An open physis did not prevent GCT from penetrating the epiphyseal cartilage. Histologically, the tumors were typical of GCT. Of 15 patients available for follow-up, 3 (20%) developed local recurrence. Conclusions: Although the overall incidence of GCT may be higher in the Asian population, the percentage of skeletally immature patients or those nearing skeletal maturity is similar to that described in literature. The biological behavior of the disease is similar to that seen in adults, except a marked female preponderance, principles of treatment, recurrence patterns, and course of the disease mirror the behavior of its adult counterpart. Level of Evidence: Level IV, case series.

Red cell hemolysis during processing and storage

Abstract: Introduction: Apart from the visual assessment, measurement of plasma hemoglobin in the supernatant from red cell units provides an objective measure of the extent of hemolysis during storage. Study Design and Methods: Packed red cells (N=50), 25 units each in triple (CPD-A1 and SAGM) and quadruple (CPD-A1 and ADSOL) blood bags were evaluated for plasma hemoglobin by the tetramethylbenzidiene (TMB) method on day 1, 7, 14, 21 and 28 of collection. The hemoglobin, hematocrit, MCV, LDH and potassium levels were also noted. Whole blood units (N=25) were used as controls. Results: Hemolysis increased in all the stored red cell units. Plasma hemoglobin increased significantly in the first week of storage. The hemolysis, LDH and potassium levels were found to be significantly higher in the red cell units harvested from the triple blood bags. However, on day 28 of storage, free hemoglobin in all the red cell units was much below the 0.8% hemolysis. Conclusion: Hemolysis of the red cells increases due to processing and during storage and is maximum during the first week. Adequate process control and proper storage facilities should be ensured to minimize the hemolysis of red cells during processing and storage.

Hypermethylation, risk factors, clinical characteristics, and survival in 235 patients with laryngeal and hypopharyngeal cancers

Abstract: BACKGROUND. It has been established that promoter hypermethylation occurs in several genes during the pathogenesis of head and neck cancer. The authors investigated the role played by the hypermethylation of 4 cancer-related genes in the survival of patients who had laryngeal and hypopharyngeal cancer and in the occurrence of second primary tumors. METHODS. Archival paraffin-embedded tissue (PET) samples were available from patients who were enrolled in a multicentric European case-control study that was performed between 1979 and 1982 and was followed up to 2000. Genomic DNA extracted from 235 PET samples were analyzed for promoter methylation status of the p16, O6-methylguanine-DNA methyltransferase (MGMT), death-associated protein kinase (DAP-K), and E-cadherin genes by using a methylation-specific polymerase chain reaction assay. RESULTS. Hypermethylation was present in 44% of samples for p16, in 27% of samples for MGMT, in 42% of samples for DAP-K, and in 43% of samples for E-cadherin. Hypermethylation of either individual genes or their combination was not associated with mortality from all causes, mortality from upper aerodigestive tract cancer, or the occurrence of second primary tumors. CONCLUSIONS. The analysis of a large series of patients with laryngeal and hypopharyngeal cancer suggested that hypermethylation is a frequent event in laryngeal and hypopharyngeal cancer, but it is not a predictor of mortality or second primary cancer. Cancer 2007. © 2007 American Cancer Society.

Leiomyoma of esophagus.

Abstract: Leiomyomas are rare benign esophageal neoplasms with an indolent clinical course. Symptoms mimic that of esophageal cancer. Esophagoscopy and endoscopic ultrasonography are the main diagnostic methods. Symptomatic and large leiomyomas should be treated surgically while small, asymptomatic lesions may be managed by regular follow up and repeated endoscopies.

Rotationplasty for bone tumors: is there still a role?

Abstract: We evaluated the disease status and functional results in 30 patients (range, 6-25 years) who underwent rotationplasty for bone sarcomas from January 2000 to February 2004. Plating was used for fixation in all 27 distal femur resections. In the proximal femur tumor, the distal femur was contoured and fixed to the ilium with cancellous screws. In the two cases involving the entire femur, the upper end of the tibia was articulated with the acetabulum in one case and an Austin Moore prosthesis was inserted in the upper end of the tibia in the other. Two patients underwent an amputation after postoperative vascular compromise. Other complications included venous congestion in two patients, who recovered after exploration, partially recovered nerve palsy in one, wound infection in two, local recurrence in one, and nonunion with subsequent bone grafting in one. Functional evaluation was documented in 26 patients with a followup ranging from 24 to 60 months. Using the Musculoskeletal Tumor Society scoring system, the score was 25 or greater in 20 of 26 patients. In appropriately indicated cases, rotationplasty provides good local disease control and good function.

Determinants of compliance in a cluster randomised controlled trial on screening of breast and cervix cancer in Mumbai, India. 1. Compliance to screening.

Abstract: Objectives: This study aims to investigate the efficacy of screening by low-cost technology in down-staging and reducing mortality due to breast and cervix cancer. Methods:

Epstein-Barr virus in tobacco-induced oral cancers and oral lesions in patients from India.

Abstract: We examined 103 oral squamous cell carcinomas (OSCC), 100 oral lesions consisting primarily of leukoplakia (82 cases), and 76 clinically normal mucosa specimens from the contralateral site in the oral cavity of individuals with oral lesions, for the presence of Epstein-Barr virus (EBV). Polymerase chain reaction (PCR) was used to amplify a 239 bp fragment of the BamHIL region of the EBV genome, followed by Southern blot hybridization with EBV oligonucleotide probe to increase further the specificity and sensitivity of the assay system. Since EBV seropositivity is frequent in populations, we also examined the peripheral blood cells (PBC) from 141 patients (50 oral cancer patients, 91 patients with oral lesions) for the presence of EBV. We detected EBV in 25 of 103 (25%) OSCC, 13 of 100 (13%) oral lesions, 3 of 76 (4%) clinically normal mucosa samples and 10 of 141 (7%) PBC. Our results indicate that EBV may contribute as one of the multiple factors in oral cancers, in a certain proportion of Indian patients.

Limb salvage surgery for osteosarcoma: effective low-cost treatment.

Abstract: Successful management of osteosarcoma with limb salvage surgery is a challenging problem in the developing world. We report our early results with low-cost chemotherapy (without methotrexate) and low-cost limb salvage surgery. We prospectively collected data for 135 patients with histologically proven high-grade osteosarcoma of the extremities given neoadjuvant chemotherapy and treated with limb salvage surgery between January 2000 and February 2004. A locally designed and fabricated stainless steel customized megaprosthesis was used in 78 patients. Disease status and function was evaluated at followup ranging from 24 to 72 months. Followup data were available for 120 of the 135 patients. There were eight infections, four prosthesis breakages and three loosenings. Eighteen patients had local recurrence; 17 of these patients also developed lung metastases. Seventy-three patients (61%) were disease-free at followup. The group of 34 patients with 100% necrosis had better disease-free survival (79%). According to a modified Enneking system, the average functional score was 25.5 of 30 (85%) for the lower extremity and 20 of 30 (66%) for the shoulder. Our preliminary results suggest osteosarcoma can be managed well in a developing country in a cost-effective way. Limb salvage surgery has now become the standard of care.

Determinants of compliance in a cluster randomised controlled trial on screening of breast and cervix cancer in mumbai, India. 2. Compliance to referral and treatment.

Abstract: Objectives The study aims to investigate the efficacy of screening by low-cost technology in down-staging and reduction of mortality due to breast and cervix cancer. Methods The present trial is a community-based, cluster randomised controlled cohort study on screening for breast and cervix cancers (clinical breast examination and visual inspection of the cervix after application of 4% acetic acid). Univariate and multivariate logistic regression analyses are conducted to identify the predictors of compliance to referral among screen-positive women and to treatment among cancer cases. Results The compliance to diagnostic investigations is 73% among screen-positive women referred for breast cancer and 79% among women referred for cervix cancer. Younger women, women working in service or being self-employed, school level-educated women, mother tongue Marathi, participation in screening in all 3 rounds and women referred as screen positive for cervix cancer had higher compliance to diagnostic investigations. The compliance to treatment completion is higher in women diagnosed with breast cancer, at 95%, compared to 86% for cervix cancers and 81% for cervix pre-cancers. Conclusions Good compliance rates along with a proper system of referral, further investigations, confirmation of diagnosis and treatment as demonstrated in this trial are crucial for successful screening programmes.

Wilms' tumor: An update.

Abstract: Wilms' tumor (WT) is the commonest pediatric renal tumor, predominantly seen in children less than five years of age. The majority of patients present with an abdominal lump and CT scan is the usual imaging modality for determining the extent of disease. With multimodality management, the results of treatment of WT have improved dramatically over the last 50 years. The treatment protocols have been devised and modified repeatedly depending on evidence from randomized trials by several cooperative groups - mainly National Wilms' Tumor Study Group (NWTSG) and the International Society of Pediatric Oncology (SIOP). The NWTSG recommends primary surgery followed by chemotherapy while SIOP advocates four weeks of chemotherapy prior to surgery. The regimen, dose and duration of chemotherapy have been repeatedly modified to reduce toxicity while maintaining efficacy. The role of radiation therapy has also been customized. Most centers have reported excellent survival rates with the modern day treatment protocols, except in patients with an unfavorable histology. The results of treatment of relapsed WT have also improved with newer drugs and combinations being used for the same.

Outcomes of resection for rectal cancer in India: the impact of the double stapling technique.

Abstract: Background The introduction of circular staplers into colorectal surgery has revolutionized anastomotic techniques stretching the limits of sphincter preservation. Data on the double-stapling technique (DST) has been widely published in the West where the incidence of colorectal cancer is high. However studies using this technique and their results, in the Indian scenario, as well as the rest of Asia, have been few and far between.

Magnetic resonance imaging based bone marrow segmentation for quantitative calculation of pure red marrow metabolism using 2-deoxy-2-[F-18]fluoro-D-glucose-positron emission tomography: a novel application with significant implications for combined structure-function approach.

Abstract: Aims The aim of this study was to introduce a new concept for accurate measurement of the global metabolic activity of the red marrow by combining segmented volumetric data from structural imaging techniques such as magnetic resonance imaging (MRI) and quantitative metabolic information provided by functional modalities such as positron emission tomography (PET).

Brain metastases from breast cancer: management approach.

Abstract: Brain metastases are a significant cause of morbidity and mortality in patients with breast cancer. HER-2 positivity is an increasingly recognized risk factor for the development of brain metastases. Although considerable progress has been made in the treatment of this complication, supportive measures like steroids, anti-seizure medication and whole-brain radiation remain the cornerstones of management in the majority of patients. The current review discusses the above and other issues like surgical excision, stereotactic radiotherapy, adjuvant radiation, radiosensitization and chemotherapy. A brief discussion of the recent evidence for the use of 'HER-1/ HER-2'-targeted therapy is also present.

Unexpected case of aplastic anemia in a patient with glioblastoma multiforme treated with Temozolomide

Abstract: We report the case of a 30-year-old woman with glioblastoma multiforme (GBM) treated with surgery followed by concomitant Temozolomide (TMZ) and external beam radiation, which she tolerated well without any interruptions. However, when she was being evaluated for adjuvant Temozolomide, she developed progressive decline in leukocyte counts and platelet counts and subsequently, febrile neutropenia with bleeding manifestations. A bone marrow aspiration and biopsy done showed a gross hypocellular bone marrow with very few erythriod and myeloid cells and no suggestion of progenitor cells, consistent with aplastic anemia.

Cystic tumours of the pancreas

Abstract: Pancreatic carcinoma accounts for the most dismal survival among all malignancies with 5-year survival rates approaching 5%. The reason for this, besides the inherent biologic nature of the disease, is the fact that the patients tend to present late in the disease. We present a review of the current published data on cystic neoplasms of the pancreas, which though rare, constitute an important subgroup of pancreatic neoplasms that have a better prognosis and are potentially curable lesions.

Techniques of tumour bed boost irradiation in breast conserving therapy: current evidence and suggested guidelines.

Abstract: Breast conservation surgery followed by external beam radiotherapy to breast has become the standard of care in management of early carcinoma breast. A boost to the tumour bed after whole breast radiotherapy is employed in view of the pattern of tumour bed recurrences in the index quadrant and was particularly considered in patients with some adverse histopathological characteristics such as positive margins, extensive intraductal carcinoma (EIC), lymphovascular invasion (LVI), etc. There is however, now, a conclusive evidence of improvement in local control rates after a boost radiotherapy dose in patients even without such factors and for all age groups. The maximum absolute reduction of local recurrences by the addition of boost is especially seen in young premenopausal patients. At the same time, the addition of boost is associated with increased risk of worsening of cosmesis and no clear cut survival advantage. Radiological modalities such as fluoroscopy, ultrasound and CT scan have aided in accurate delineation of tumour bed with increasing efficacy. A widespread application of these techniques might ultimately translate into improved local control with minimal cosmetic deficit. The present article discusses the role of radiotherapy boost and the means to delineate and deliver the same, identify the high risk group, optimal technique and the doses and fractionations to be used. It also discusses the extent of adverse cosmetic outcome after boost delivery, means to minimise it and relevance of tumour bed in present day scenario of advanced radiotherapy delivery techniques like Intensity modulated radiation therapy (IMRT).

Assessment of three-dimensional set-up errors in conventional head and neck radiotherapy using electronic portal imaging device.

Abstract: Background Set-up errors are an inherent part of radiation treatment process. Coverage of target volume is a direct function of set-up margins, which should be optimized to prevent inadvertent irradiation of adjacent normal tissues. The aim of this study was to evaluate three-dimensional (3D) set-up errors and propose optimum margins for target volume coverage in head and neck radiotherapy.

Malignant pilar tumor of the scalp: a case report and review of literature.

Abstract: Pilar tumor is a rare neoplasm arising from the external root sheath of the hair follicle and is most commonly observed on the scalp. These tumors are largely benign, often cystic, and are characterized by trichilemmal keratinization. Wide local excision has been the standard treatment. Recent reports have described a rare malignant variant with an aggressive clinical course and a propensity for nodal and distant metastases which, therefore, merits aggressive treatment. In this report, we present a case of malignant pilar tumor of the scalp with multiple nodal metastases at presentation. Diagnostic and therapeutic considerations, in the form of adjuvant radiotherapy, are subsequently discussed.

Perioperative Interstitial Brachytherapy for Soft Tissue Sarcomas: Prognostic Factors and Long-Term Results of 155 Patients

Abstract: Background The goal of this study was to evaluate the efficacy of temporary interstitial brachytherapy (BRT) for patients undergoing combined modality management of soft tissue sarcomas (STS).