Supplementary Figure 2. Histopathological examination of affected scalp in a patient with folliculitis spinuosa decalvans showing concentric fibrosis at level of follicular infundibulum with associated perifollicular lymphocytic inflammation.

Supplementary Figure 2. Histopathological examination of affected scalp in a patient with folliculitis spinuosa decalvans showing concentric fibrosis at level of follicular infundibulum with associated perifollicular lymphocytic inflammation. No neutrophils or eosinophils are seen. Sebaceous glands are present. A few compound follicles are noted (hematoxylin and eosin, original magnification: x100).

补充图2。脱发性棘状毛囊炎（folliculitis spinulosa decalvans）患者受累头皮的组织病理学检查结果：毛囊漏斗部水平可见同心圆状纤维化，伴发毛囊周围淋巴细胞性炎症。未观察到中性粒细胞或嗜酸性粒细胞。皮脂腺存在。可见少量复合毛囊（苏木精-伊红（hematoxylin and eosin）染色，原始放大倍数：×100）。