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02 October 2019 : Case report  Japan

Chronic Expanding Hematoma in the Thigh: A Late Complication 32 Years After Treatment of Synovial Sarcoma: A Case Report

Challenging differential diagnosis, Unusual or unexpected effect of treatment, Diagnostic / therapeutic accidents, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)

Akio Sakamoto1ABCDEF*, Takeshi Okamoto1BCDE, Tadao Tsuboyama2ABCDEFG, Shuichi Matsuda1BCDE

DOI: 10.12659/AJCR.917855

Am J Case Rep 2019; 20:1449-1453

Abstract

BACKGROUND: Chronic expanding hematoma is characterized by a continuous growing hematoma lesion.

CASE REPORT: The present case is of a patient who had undergone resection of synovial sarcoma in the posterior thigh and subsequent intraoperative radiation to the region at the age of 18 years. The patient observed swelling at the surgical site 31 years later at the age of 49 years. Magnetic resonance imaging revealed a growing hematoma with a cystic appearance. Partial resection of the wall and electrocoagulation of bleeding from the remaining wall were performed at the age of 50 years.

CONCLUSIONS: Chronic expanding hematoma occurred as a late complication of tumor treatment.

Keywords: Hematoma, Magnetic Resonance Imaging, Radiation, Sarcoma, Synovial

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American Journal of Case Reports eISSN: 1941-5923
American Journal of Case Reports eISSN: 1941-5923