Fine needle aspiration biopsy of a small round cell tumor exhibiting both neural and myogenic differentiation : A case report

Divergent differentiation may not be detected in the limited material available in a fine needle aspiration biopsy (FNAB). A small round cell malignancy showed neural features ultrastructurally on FNAB, in keeping with primitive neuroectodermal tumor, but desmin and actin positivity on surgical biop...

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