June 2026, Volume 4, Issue 6

Author

Kaushik Bhattacharya, Sharad Syangden, Mahesh Kumar, Asitava Deb Roy, Babai Halder and Aarzoo Nagpal

Abstract

A 50-year-old woman presented with a longstanding, painless right upper arm swelling. Imaging and FNAC suggested a spindle cell neoplasm. Surgical excision revealed a well-circumscribed intramuscular mass. Histopathology and immunohistochemistry confirmed myxofibroma (intramuscular myxoma). The postoperative course was uneventful, with no recurrence at one-year follow-up. Intramuscular myxomas are rare benign tumors requiring surgery only for symptomatic relief. Long-term follow-up is essential due to recurrence risk and to exclude misdiagnosed myxofibrosarcoma.