PMC5097801_01
Soft tissue mass in the right hand. The mass was located in the first intercarpal space, with the overlying skin showing discoloration.
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fig1
Although no pain was associated with the mass, the patient experienced sensory disturbance of the right thumb (Figure 1).
(a) T1 weighted, (b) T2 weighted, and (c) enhanced MRI images of the right hand suggested a malignant neoplasm. (d) MRI and (e) CT of the sacrum showed a lytic and sclerotic lesion, which was regarded as a prostate cancer metastasis.
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fig2
The mass was adjacent to the first metacarpal bone (Figure 2).
Staining with (a) hematoxylin and eosin (x20), (b) CAM5.2, (c) vimentin, (d) prostate specific acid phosphatase, and (e) androgen receptor showed small-sized but pleomorphic anaplastic tumor cells. (f) Reticulin silver impregnation showed epithelioid-like structures, indicative of carcinoma (bar: 100 mum).
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fig3
The patient was therefore diagnosed with metastatic prostate cancer (Figure 3).
Postoperative appearance of the right hand. The patient used the pollicized thumb for activities of daily living, such as writing.
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The patient was able to use the pollicized thumb for activities of daily living, such as writing, six months after the operation (Figure 4).