Showing papers by "Young Jin Suh published in 2008"

Hopf hypersurfaces in complex two-plane grassmannians with lie parallel normal jacobi operator

Abstract: In this paper we give some non-existence theorems for Hopf hypersurfaces in the complex two-plane Grassmannian G2( Cm+2) with Lie parallel normal Jacobi operator � RN and totally geodesic D and D? components of the Reeb ow.

On the structure Jacobi operator of a real hypersurface in complex projective space

Abstract: We prove the non-existence of a certain family of real hypersurfaces in complex projective space. From this result we classify real hypersurfaces whose structure Jacobi operator satisfies a condition that generalizes parallelness.

Anti-commuting real hypersurfaces in complex two-plane grassmannians

Abstract: In this paper we give a nonexistence theorem for real hypersurfaces in complex two-plane Grassmannians G2.C mC2 / with anti-commuting shape operator.

Malignant Fibrous Histiocytoma in the Breast: A Case Report

Abstract: 악성 섬유조직구종은 성인의 연부조직에서 발생하는 가장 흔 한 악성 육종으로 주로 사지, 복강, 후복강의 심부 연부조직에서 발생한다.(1) 유방의 원발성 육종은 매우 드물어서 전체 유방 악 성종양의1% 미만이며,(2) 특히유방의원발성악성섬유조직구 종은 매우 드물다. 유방의 원발성 육종들은 세포 형태가 매우 다 양하지만, 악성 섬유조직구종과 기질육종(stromal sarcoma)은 섬유모세포(fibroblast)를 닮은 방추형 세포(spindle cell)들로 구성되어있어서감별이쉽지않았으나면역조직화학염색으로정 확한진단과분류가가능하게되었다.(3) 유방의악성섬유조직구 종은드물게발생하는종양이므로적절한치료방법이확실히밝 혀져 있지 않다. 가장 중요한 예후 인자는 남아있는 종양이 없도 록완전히절제하는것이며, 조직학적등급과종양의크기가예후 에중요한 영향을미친다.(4,5) 저자들은 49세여자의우측 유방 에서발생한섬유낭종성병변의절제술시행후2개월만에발병 한 악성 섬유조직구종을 치험하였기에 문헌 고찰과 함께 보고하 는바이다.

Complete harmonic stable minimal hypersurfaces in a Riemannian manifold

Abstract: In this paper, we will introduce the notion of harmonic stability for complete minimal hypersurfaces in a complete Riemannian manifold. The first result we prove, is that a complete harmonic stable minimal surface in a Riemannian manifold with non-negative Ricci curvature is conformally equivalent to either a plane R2 or a cylinder R × S1, which generalizes a theorem due to Fischer-Colbrie and Schoen [12].

Real Hypersurfaces in Complex Hyperbolic Space with Commuting Ricci Tensor

Abstract: In this paper we consider a real hypersurface M in complex hyperbolic space HnC satisfying SA = AS , where , A and S denote the structure tensor, the shape operator and the Ricci tensor of M respectively. Moreover, we give a characterization of real hypersurfaces of type A in HnC by such a commuting Ricci tensor.

Predictive Factors of Residual Invasive Breast Cancer after Core Biopsy for Ductal Carcinoma in Situ

Abstract: that predict the presence of invasive cancer after core biopsy for ductal carcinoma in situ (DCIS). Methods: The patients diagnosed with ductal carcinoma in situ on core biopsy (stereotactic or ultrasound) from February 2003 to May 2007 were identified by retrospectively reviewing the collected data. We analyzed the demographic data, the characteristics on the imaging studies and the histologic features on DCIS. We assessed the factors that included age, the physical examination, the radiologic findings, the biopsy method, and the histologic findings related to the presence of invasive cancer after core biopsy. Results: Fifty-one patients were diagnosed with DCIS after core biopsy. Of the 51 patients, 19 patients had invasive carcinoma diagnosed on final excision. The factors that correlated with invasion were the biopsy method, a palpable mass and a mammographic mass, regardless of calcification. A high nuclear grade, the comedo type, age, and the tumor size were not related to presence of invasive cancer. Conclusion: A mass lesion on mammography, a palpable mass, and 14G core needle biopsy were significant predictors of invasion in patients with ductal carcinoma in situ. Surgeons always recognize the possibility of invasive cancer in patients with ductal carcinoma in situ on the core needle biopsy.

Two Cases of Primary Hyperparathyroidism Associated with Colon Cancer

Abstract: Hypercalcemia is often observed in cancer patients secondary to parathyroid hormone (PTH) related peptide production. However, primary hyperparathyroidism and colon cancer rarely present simultaneously. Calcium is believed to have a chemopreventive effect against colorectal cancer because it reduces crypt cell hyperproliferation in both humans and in animals. There is evidence to suggest that the incidence of colorectal cancer in humans is reduced by high calcium intake. In patients with primary hyperparathyroidism, increased PTH activates 1,25(OH)2D and enhances calcium absorption in the gut. Consequently, the calcium level in the lumen is decreased, leading to an elevated risk of colorectal cancer. We report two patients with colon cancer and hypercalcemia secondary to primary hyperparathyroidism, along with a brief review of the literature. (J Korean Endocr Soc 23:204~209, 2008)

A Novel Therapeutic Approach to Breast Cancer using a Selective Cyclooxygenase 2 Inhibitor and Adenovirus-mediated Delivery of the Melanoma Differentiation- associated Gene-7 (Ad-mda7)

Abstract: Recently, many preclinical and clinical researches have focused on the possible roles of new therapeutic modalities to enhance current treatment efficacy or to extend the current limitations against breast cancer treatment. Th melanoma differentiation-associated gene-7 (mda-7 ), now classified as a member of the interleukin (IL)-10 gene family, has attracted attentions from several investigators for its unique ability to act against various cancers including breast cancer. In addition to mda-7, highly selective cyclooxygenase-2 (Cox2) inhibitors, have continuously demonstrated possible anticancer effects against various cancers even though theray with many of the inhibitors has resulted in major set backs due to complications after long-term use. However, few have performed to demonstrate the synergistic effects of these two efficient treatment options or to demonstrate preventive measures to reduce the size of tumors. We summarize important results and our experience related to the use of a selective cyclooxygenase 2 inhibitor and adenovirus-mediated delivery of mda-7.