in the affected areas individual hair follicles were replaced , or were associated with solid strands and branching cords of undifferentiated basaloid cells , filled in between by fibrous stroma resembling either a miniature premalignant fibroepithelial tumor of pinkus , a small trichoepithelioma , or a basal cell epithelioma .
C0221971
hair follicles
C0349658
trichoepithelioma