PMC4830173_01
Interdigital pilonidal sinus of the right hand third web space
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F1
Physical examination findings were purulent discharge from an 8 mm diameter sinus opening in the third web space of the right hand [Figure 1].
PMC4830173_02
(a) Histological examination in the first patient revealed a sinus tract, and multiple broken hair shafts. The sinus was surrounded by benign squamous epithelium, acute, and chronic inflammatory cells with foreign body giant cells (H and E, x40); (b) Histological examination in the second patient showed a sinus tract with multiple broken hair shafts and foreign body type granulomas (H and E, x40)
IJT-8-38-g002.jpg
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F2
Histological examination revealed findings consistent with IPS [Figure 2].