Perineural invasion by keratoacanthoma.
In 18 examples of keratoacanthoma, the proliferating squamous epithelium histologically invaded the perineural space. The invasion did not adversely affect the biologic behavior and the prognosis.
D000328:Adult; D000368:Aged; D004423:Ear; D004848:Epithelium / Q000473:pathology; D005145:Face; D005260:Female; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009333:Neck; D009417:Nerve Tissue / Q000473:pathology*; D012867:Skin / Q000473:pathology*