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← Childhood Soft Tissue Sarcoma

HEALTH PROFESSIONAL · SOURCE READING

Treatment of Tumors of Uncertain Differentiation

Source: Childhood Soft Tissue Sarcoma Treatment (PDQ®)–Health Professional Version, National Cancer Institute.

Source updated: April 21, 2025 · Captured 2026-09-09.

Selected source text with whitespace normalised. This Triangle page is not an NCI PDQ summary.

Tumors of uncertain differentiation have many subtypes, including the following:

Myxoma not otherwise specified (NOS) (benign).

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Synovial sarcoma NOS (poorly differentiated, spindle cell, and biphasic varieties).

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Epithelioid sarcoma.

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Alveolar soft part sarcoma.

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Clear cell sarcoma NOS.

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Extraskeletal myxoid chondrosarcoma.

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Desmoplastic small round cell tumor.

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Rhabdoid tumor NOS (extrarenal).

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Perivascular epithelioid tumor (PEComa), malignant.

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Undifferentiated sarcoma.

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Pleomorphic sarcoma, undifferentiated.

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Intracranial mesenchymal tumor.

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Round cell sarcoma, undifferentiated.

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Continue within this section

Myxoma NOS →Synovial Sarcoma NOS (Poorly Differentiated, Spindle Cell, and Biphasic Varieties) →Epithelioid Sarcoma →Alveolar Soft Part Sarcoma →Clear Cell Sarcoma NOS →Extraskeletal Myxoid Chondrosarcoma →Extraskeletal Ewing Sarcoma →Desmoplastic Small Round Cell Tumor →Rhabdoid Tumor NOS (Extrarenal) →PEComa, Malignant →Undifferentiated Sarcoma →Pleomorphic Sarcoma, Undifferentiated (Malignant Fibrous Histiocytoma) →Intracranial Mesenchymal Tumor →Round Cell Sarcoma, Undifferentiated →

Preserved source evidence · Not medical advice