case_images: PMC9420417_01
case_images: Flowchart of the patient's diagnosis history.
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case_images: The patient's diagnosis history flowchart can be seen in Figure 1.
case_images: The ring finger of the right hand was partially swollen, the edge of the lesion was desquamated, and a large black scab under the nail and part of the nail plate were separated.
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case_images: Partial separation of the deck, dark red blood scabs with purulent secretions can be seen at the separation, the deck thickens and turns white, with mild tenderness. (Figure 2) Superficial lymph nodes were not enlarged.
case_images: Histopathology of the lesion. (A and B) Biopsy shows atypical cells with altered nuclear cytoplasmic ratio and dyskeratotic cells. (3A HEx200/3B HEx400).
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case_images: X-ray of right hand: No bone destruction.
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case_images: Laboratory examinations: X-ray (Figure 4) showed degenerative changes in the right hand, and no obvious bone destruction was found in the fourth phalanx.
case_images: Wide local excision of the skin malignant tumor. (A) Nail bed erosion visible after nail extraction. (B) Expansion along the edge of the tumor 6mm, deep to the surface of the periosteum, excision of the tumor along the edge of the periosteum.
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