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"Proximal-type" epithelioid sarcoma in a young girl
Claudio Gambini1, Angela Sementa, Franco Rongioletti
1Division of Pathology, G. Gaslini Hospital, Genoa, Italy.
Pediatric Dermatology
|April 14, 2004
Summary
Proximal-type epithelioid sarcoma, a rare soft-tissue cancer, presents differently from the distal form. This study details a case in a young girl, highlighting its aggressive nature and diagnostic considerations.
Area of Science:
- Oncology
- Dermatopathology
- Soft Tissue Pathology
Background:
- Epithelioid sarcoma is a rare malignant soft-tissue neoplasm.
- Classical epithelioid sarcoma typically affects distal extremities in young adults.
- A distinct 'proximal-type' epithelioid sarcoma has been described, predominantly in the pelvic and perineal regions.
Observation:
- Proximal-type epithelioid sarcoma exhibits epithelioid-like cells with rhabdoid features, lacking a granuloma-like pattern.
- Immunohistochemically, it coexpresses vimentin, cytokeratin, epithelial membrane antigen, and CD34.
- This report documents a case of proximal epithelioid sarcoma in a 12-year-old girl, a presentation not previously reported in dermatologic literature.
Findings:
- The 12-year-old patient presented with proximal-type epithelioid sarcoma.
- Histological examination revealed epithelioid-like cells with rhabdoid features.
- Immunohistochemical markers confirmed the diagnosis.
Implications:
- Proximal-type epithelioid sarcoma may be more aggressive than the distal form.
- It should be considered in the differential diagnosis of tumors with rhabdoid features, especially extrarenal malignant rhabdoid tumors.
- This case expands the known demographic and literature for proximal-type epithelioid sarcoma.