malignant myopericytoma
Epidemiology
no sex predominance (#12405913#)
median age 67 years (range 19-81 years) (#12405913#)
neck, arm, thigh and foot(#12405913#)
Synopsis
highly mitotic myoid-appearing ovoid-to-spindle cells showing at least focally striking perivascular orientation resembling that seen in benign myopericytoma
fascicular +/-
thin-walled branching vessels +/-
Immunochemistry
positivity for smooth muscle actin
+/- dot-like desmin positivity
Prognosis
possible metastases (#12405913#)
References
McMenamin ME, Fletcher CD. Malignant myopericytoma: expanding the spectrum of tumours with myopericytic differentiation. Histopathology. 2002 Nov;41(5):450-60. PMID: #12405913#