Difference between revisions of "CD99"
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===Membrane staining=== | ===Membrane staining=== | ||
*[[Ewing sarcoma]] - diffuse (plasma membrane) staining. | *[[Ewing sarcoma]] - diffuse (plasma membrane) staining. | ||
* | *Lymphoblastic lymphoma/leukemia. | ||
*[[Angiomatoid fibrous histiocytoma]]. | *[[Angiomatoid fibrous histiocytoma]]. | ||
*[[Desmoplastic small round cell tumour]]. | *[[Desmoplastic small round cell tumour]]. | ||
Revision as of 12:38, 15 October 2015
CD99 is a commonly available immunostain with various uses. It stains a lot of different tumour and has been described by one soft tissue pathologist as slutty.
Positive
Membrane staining
- Ewing sarcoma - diffuse (plasma membrane) staining.
- Lymphoblastic lymphoma/leukemia.
- Angiomatoid fibrous histiocytoma.
- Desmoplastic small round cell tumour.
Others
- Malignant melanoma (9 of 10 cases[1]).
- Atypical fibroxanthoma (19 of 26 cases[1]).
Negative
- Squamous cell carcinoma.[1]
- Undifferentiated small round cell sarcoma with t(4;19) (CIC-DUX sarcoma) - negative or weak positive.