Fig. 2 | Modern Pathology

Fig. 2

From: Cutaneous soft tissue tumors: how do we make sense of fibrous and “fibrohistiocytic” tumors with confusing names and similar appearances?

Fig. 2

Aneurysmal dermatofibroma. a The tumor contains blood-filled cystic spaces. b There is fine hemosiderin in foam cells admixed with tumor cells adjacent to the areas of hemorrhage. c Overlying epidermal hyperplasia is a typical finding. d The tumor extends into the superficial subcutaneous fat and shows e entrapment of lateral hyaline dermal collagen. f The neoplastic spindle cells show a storiform growth pattern. Note the hemorrhage and touton-type giant cells

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