Journal ArticleDOI
Uncommon Primary Pelvic Retroperitoneal Masses in Adults: A Pattern-based Imaging Approach
Alampady Krishna Prasad Shanbhogue,Najla Fasih,David MacDonald,Adnan Sheikh,Christine O. Menias,Srinivasa R. Prasad +5 more
TLDR
In this article, a broad spectrum of primary pelvic retroperitoneal masses in adults are classified into five distinct subgroups using a pattern-based approach that takes anatomic distribution and certain imaging characteristics into account, allowing greater accuracy in their detection and characterization and helping to optimize patient management.Abstract:
There is a broad spectrum of primary pelvic retroperitoneal masses in adults that demonstrate characteristic epidemiologic and histopathologic features and natural histories. These masses may be classified into five distinct subgroups using a pattern-based approach that takes anatomic distribution and certain imaging characteristics into account, allowing greater accuracy in their detection and characterization and helping to optimize patient management. The five groups are cystic (serous and mucinous epithelial neoplasms, pelvic lymphangioma, tailgut cyst, ancient schwannoma), vascular or hypervascular (solitary fibrous tumor, paraganglioma, pelvic arteriovenous malformation, Klippel-Trenaunay-Weber syndrome, extraintestinal GIST [gastrointestinal stromal tumor]), fat-containing (lipoma, liposarcoma, myelolipoma, presacral teratoma), calcified (calcified lymphocele, calcified rejected transplant kidney, rare sarcomas), and myxoid (schwannoma, plexiform neurofibroma, myxoma).Cross-sectional imaging modalities help differentiate the more common gynecologic neoplasms from more unusual masses. In particular, the tissue-specific multiplanar capability of high-resolution magnetic resonance imaging permits better tumor localization and internal characterization, thereby serving as a road map for surgery.read more
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Journal ArticleDOI
Fat-containing Retroperitoneal Lesions: Imaging Characteristics, Localization, and Differential Diagnosis.
Akram M. Shaaban,Maryam Rezvani,Marc Tubay,Khaled M. Elsayes,Paula J. Woodward,Christine O. Menias +5 more
TL;DR: Of the primary retroperitoneal fat-containing lesions, lipoma and liposarcoma are common, while other lesions are relatively rare, and fatty replacement of the pancreas and pancreatic lipomas are relatively common, whereas pancreatic teratomas are rare.
Journal ArticleDOI
Solid malignant retroperitoneal masses—a pictorial review
TL;DR: Many of the primary retroperitoneal neoplasms that may be encountered by the radiologist are reviewed to help select and guide the site to biopsy from these usually large and heterogeneous neoplasm.
Journal ArticleDOI
MR imaging of the retrorectal–presacral tumors: an algorithmic approach
Hooman Hosseini-Nik,Keyanoosh Hosseinzadeh,Rajesh Bhayana,Kartik S. Jhaveri,Kartik S. Jhaveri +4 more
TL;DR: The anatomy of the retrorectal–presacral space and the related tumors, optimal MRI protocol, MRI-based approach to differential diagnosis, and finally pertinent reporting pointers and implications of MR imaging findings for surgical management are reviewed.
Journal ArticleDOI
Hamartomas from head to toe: An imaging overview
Francisca Leiter Herrán,Carlos S. Restrepo,Daniel I Alvarez Gómez,Thomas Suby-Long,Daniel Ocazionez,Daniel Vargas +5 more
TL;DR: Hamartomas are tumours composed of mesenchymal tissues such as cartilage, fat, connective tissue and smooth muscle and can be found in virtually any organ system and a diagnosis can be confidently made.
Journal ArticleDOI
Benign and malignant tumors of the rectum and perirectal region
Andrei S. Purysko,Christopher P. Coppa,Matthew F. Kalady,Rish K. Pai,Hilton Leão Filho,Chakradhar R. Thupili,Erick M. Remer +6 more
TL;DR: Cross-sectional imaging, especially transrectal ultrasound and magnetic resonance imaging, allows evaluation of the entire bowel wall thickness and the perirectal tissues, helping further characterize these tumors.
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Journal ArticleDOI
Leiomyomas beyond the Uterus: Unusual Locations, Rare Manifestations
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