Test yourself: right thigh mass

TEST YOURSELF:

Question – Painful right thigh mass

Twenty-seven year-old male presents with a 6 month history of a painful right thigh mass with rapid enlargement and new onset of bleeding (Figs. 1, 2, 3 and 4)

Fig. 1

AP radiograph of the right thigh

Fig. 2

(a) Coronal and (b) axial contrast-enhanced CT of the right thigh

Fig. 3

Axial (a) T1-w, (b) STIR, and (c) fat-suppressed T1-w contrast-enhanced MRI of the right thigh

Fig. 4

Histopathological photomicrographs (hematoxylin and eosin staining) at (a) low power depicting lesion involving the subcutis and deep dermis exhibiting a monomorphic storiform pattern with branching hemangioperictyoma-like vessels and (b) bland-appearing spindle cells with plump, ovoid to elongated vesicular nuclei and indistinct, pale eosinophilic cytoplasm (40x)