PMC6512394_01
(A,B) Fluctuant nodules on the proximal phalanx of the left middle finger and the right arm.
fmed-06-00097-g0001.jpg
PMC6512394_01_fmed-06-00097-g0001.jpg
F1
Physical examination showed a violaceous firm nodule with purulent drainage over the proximal phalanx of the left middle finger (Figure 1A) and up to 20 reddish to violaceous firm nodules up to 4 x 2 cm in size on the right arm (Figure 1B).
Histopathological finding of a nodule from the right forearm. (A) Dermal abscess with massive neutrophils in the center [hematoxylin and eosin (HE) staining, original magnification x20]. (B) Macrophages in the border area [HE staining, original magnification x100]. (C) Branched septate hyphae in the transition zone between granulomatous inflammation and abscess [Periodic Acid Schiff (PAS) staining, original magnification x400].
fmed-06-00097-g0002.jpg
PMC6512394_01_fmed-06-00097-g0002.jpg
F2
A biopsy specimen of a nodule from the right forearm showed a dermal abscess with massive neutrophils in the center and macrophages in the border area (Figures 2A,B). The Periodic Acid Schiff (PAS) staining showed branched septate hyphae in the transition zone between granulomatous inflammation and abscess (Figure 2C).