1990 Leshin B, White WL

 
Folliculocentric basaloid proliferation. Arch Dermatol 1990;126:900–966 (Fig. 13).

View Figure  		Fig. 13  (orig. Fig. 3) A vertically oriented girondolelike arrangement of basaloid proliferation is displayed around a follicular axis. Inset, The lacelike basaloid proliferation, arising from the apparent external root sheath, has a hyaline basement membrane (frozen section, hematoxylin-eosin, 260; inset, 2300).
 

Message

 
Folliculocentric basaloid proliferation noted in persons undergoing Mohs micrographic surgery for basal-cell carcinoma represent complex growths of bulge epithelium. Folliculocentric basaloid proliferation is characterized histologically by a girondolelike arrangement of basaloid cells.
 

Critique

 
Folliculocentric basaloid proliferation as described by Leshin and White is a hyperplasia of mantle epithelium, not of bulge epithelium. The inset in one of the photomicrographs shows sebocytes within the lattice-like arrangement of immature epithelial cells, proof of the sebaceous nature of this hyperplastic mantle epithelium. Zimmermann had pictured the same phenomenon in 1935.