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Ectomesenchymoma
Source: Childhood Soft Tissue Sarcoma Treatment (PDQ®)–Health Professional Version, National Cancer Institute.
Source updated: April 21, 2025 · Captured 2026-09-09.
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Context: Treatment of Skeletal Muscle Tumors
Ectomesenchymoma is a rare skeletal muscle tumor that mainly occurs in children. It is a biphenotypic soft tissue sarcoma with both mesenchymal and ectodermal components.
A single-institution retrospective review identified seven cases of malignant ectomesenchymoma.[1] All seven patients were male, with a mean age of 7.5 months (range, 0.6–17.0 months). Five of the seven patients in this series were healthy and free of disease at the time of reporting.
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