KROK 1 2021 – Question 44 · KROK (Medicine) · Pathomorphology
A man has a node in his thigh that is located within the thigh muscles. On section, the node is whitish, fibrous, without clear margins. Microscopy shows that the tumor consists of immature polymorphic fibroblast-like cells with numerous mitoses and collagen fibers. What tumor is it?
- A. Fibroma
- B. Fibromyoma
- C. Myosarcoma
- D. Fibrosarcoma
- E. Rhabdomyosarcoma
Hint
Look at the immature, mitotically active fibroblast-like cells infiltrating muscle and decide which connective-tissue lineage is malignant, as opposed to a muscle-derived tumour.
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