Desmoplastic Small Round Cell Tumors With Atypical Presentations: A Report of 34 Cases.

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Desmoplastic Small Round Cell Tumors With Atypical Presentations: A Report of 34 Cases.

Int J Surg Pathol. 2018 Dec 06;:1066896918817140

Authors: Al-Ibraheemi A, Broehm C, Tanas MR, Horvai AE, Rubin BP, Cheah AL, Thway K, Fisher C, Bahrami A, Folpe AL, Fritchie KJ

Abstract
OBJECTIVES: Desmoplastic small round cell tumor (DSRCT) is an aggressive round cell sarcoma that arises in the abdominal cavity/pelvis of young males. We sought to expand its clinicopathologic spectrum.
METHODS: Cases of DSRCT presenting in patients >30 years of age or tumors arising outside of the abdominal cavity/pelvis were retrieved.
RESULTS: Thirty-four cases were identified. Sixteen tumors arose at atypical sites (head/neck, intracranial, thigh, axilla/shoulder, inguinal/paratesticular, intraosseous, and uterine corpus). The remaining 18 patients were older than 30 years, and their tumors involved the abdomen or pelvis. The majority of cases showed areas with classic histology, while 6 cases exhibited solid growth and 5 showed macronodular architecture. Cytologic appearance included round cell, rhabdoid, epithelioid, and small cell.
CONCLUSION: DSRCT may arise at nonabdominal locations in both pediatric and adult populations, as well as intra-abdominally in older adults, and these tumors exhibit high rates of metastasis and morbidity.

PMID: 30522375 [PubMed - as supplied by publisher]

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