The adult type has abundant eosinophilic cytoplasm. The fetal type consists of an admixture of small cells and cells resembling fetal muscle. The juvenile type is intermediate between the other two types.
Immunohistochemistry
|
positive |
|
|
positive |
|
|
usually negative |
|
|
positive |
|
|
positive |
|
|
positive |
|
|
usually negative |
|
|
usually negative |
|
|
usually negative |
|
|
usually negative |
|
|
cytokeratin |
usually negative |
|
usually negative |
|
|
may be focally positive |
|
|
reported in one case |
|
Differential diagnosis
granular cell tumour
hibernoma
paraganglioma
rhabdomyosarcoma
References
Diagnostic Immunohistochemistry edited by Professor D. J. Dabbs, page 75
©SMUHT/PW Bishop