PMC7276160_01
Superior view of the patient's scalp shows a dome-shaped nodule with multiple atrophic scars and comedones. Note the multiple grouped comedones (inset)
IJT-12-35-g001.jpg
PMC7276160_01_IJT-12-35-g001.jpg
F1
A close observation of the scalp showed multiple grouped comedones distributed over the vertex and occipital areas [Figure 1].
(a) Trichoscopy of the nodular lesion reveals a honeycomb pattern, few black dots, white dots, vellus hairs, broken hair shafts, and violaceous areas. (b) Trichoscopy of the vertex and occipital areas shows multiple grouped comedones
IJT-12-35-g002.jpg
PMC7276160_01_IJT-12-35-g002.jpg
F2
Trichoscopic examination of the nodule revealed a honeycomb pattern, black dots, white dots, vellus hairs, broken hair shafts, and violaceous areas [Figure 2a]. Trichoscopy of other vertex and occipital areas showed multiple grouped comedones [Figure 2b].
Histopathology shows ruptured pilosebaceous unit with perifollicular mixed inflammatory infiltrate, (H and E; x4). Note the mixed inflammatory infiltrate (inset, x40)
IJT-12-35-g003.jpg
PMC7276160_01_IJT-12-35-g003.jpg
F3
A biopsy from the nodule showed follicular plugging, ruptured pilosebaceous apparatus with mixed inflammatory infiltrate (perifollicular and in the deep dermis) [Figure 3].