PMC9748238_01
(A) Redness and swelling of the right middle finger. (B) Subcutaneous calcified lesions on the right middle finger. (C) Pus coming out of the subcutaneous calcified lesion on the right middle finger. (D) Redness spreading in a linear pattern from the right middle finger to the right forearm (black arrows). (E) Microscopic examination revealing pus mixed with numerous neutrophils (red arrowheads) and microcalcifications (red arrows; hematoxylin and eosin stain, original magnification 40x).
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On examination, redness, swelling, and tenderness were noted in the finger (Fig. 1A). The finger had calcified lesions, one of which had pus coming out (Fig. 1B,C). The redness spread in a linear pattern (Fig. 1D). Microscopic examination showed pus mixed with countless neutrophils and microcalcifications (Fig. 1E).