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Soft tissue myoepithelioma: a case report.
L Venkatraman1, A R Sinnathuray, V Raut
1Department of Pathology, Royal Group of Hospitals Trust, Belfast, Northern Ireland.
Pathology
|November 1, 2002
Summary
Myoepitheliomas, rare soft tissue tumors, can present diagnostic challenges. This case highlights their occurrence in deep neck tissues, emphasizing the need for awareness in differential diagnoses.
Area of Science:
- Oncology
- Pathology
- Surgical Pathology
Background:
- Myoepitheliomas are tumors primarily composed of myoepithelial cells.
- While well-documented in salivary glands, their presence in soft tissues is less recognized, leading to diagnostic difficulties.
Observation:
- A case of myoepithelioma in the deep soft tissues of the lower neck is presented.
- The tumor exhibited gross features of being well-circumscribed with solid and cystic areas.
- Histological examination revealed a vascularized tumor with bland spindle-shaped cells in various growth patterns.
Findings:
- Immunohistochemistry demonstrated diffuse S100 protein, calponin, vimentin, and glial fibrillary acidic protein positivity, confirming myoepithelial differentiation.
- Electron microscopy confirmed features consistent with myoepithelial cells, including basal lamina and cytoplasmic myofilaments.
Implications:
- This report underscores the rarity of myoepitheliomas in deep soft tissues.
- Pathologists should consider myoepithelioma in the differential diagnosis of soft tissue spindle cell neoplasms.