Cutaneous neurofibromas: Current clinical and pathologic issues.

Objective: To present the current terminology and natural history of neurofibromatosis 1 (NF1) cutaneous neurofibromas (cNF).

Methods: NF1 experts from various research and clinical backgrounds reviewed the terms currently in use for cNF as well as the clinical, histologic, and radiographic features of these tumors using published and unpublished data.

Results: Neurofibromas develop within nerves, soft tissue, and skin.

Acquired féline hair shaft abnormality resembling trichorrhexis nodosa in humans.

Abstract  A 2-year-old castrated male domestic short-haired cat presented with self-induced alopecia associated with whitish nodes on the remaining hair shafts. Light and scanning microscopy demonstrated swellings of the hair shafts, accompanied by cuticular damage leading to hair fractures with a typical brush-like appearance. A díagnosis of trichorrhexis nodosa associated with flea allergy dermatitis was made.