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Difference between revisions of "Soft tissue lesions"
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→Tumours of uncertain differentiation: +epithelioid sarcoma
(→Nodular fasciitis: more) |
(→Tumours of uncertain differentiation: +epithelioid sarcoma) |
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=Tumours of uncertain differentiation= | =Tumours of uncertain differentiation= | ||
==Epithelioid sarcoma== | |||
===General=== | |||
*Rare. | |||
*Adolescents, young adults. | |||
===Microscopic=== | |||
Features:<ref>{{Ref WHOSTAB|205}}</ref> | |||
*Epithelioid morphology and spindle morphology. | |||
*Prominent nucleolus - '''key feature'''. | |||
*Zonal necrosis with irregular border. | |||
**Descriptors: "Garland necrosis", necrosis with "scalloped border" = necrotic regions with irregular border. | |||
DDx: | |||
*[[Rheumatoid nodule]]. | |||
*[[Granuloma annulare]]. | |||
===Microscopic=== | |||
Features: | |||
*INI1 +ve. | |||
**AT/RT +ve. | |||
==Alveolar soft part sarcoma== | ==Alveolar soft part sarcoma== | ||
*Abbreviated ''ASPS''. | *Abbreviated ''ASPS''. | ||