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The coincidence of alopecia and a tumour may indicate the paraneoplastic nature of alopecia. Paraneoplastic alopecia is not uncommon in animals, feline paraneoplastic alopecia being the best example known. We present a case of alopecia coinciding with the presentation of a cholangiocarcinoma in a woman. Following surgical resection of the tumour, alopecia resolved spontaneously and it reappeared on local recurrence, 2 years later. As far as pathogenesis is concerned, the coincidence of alopecia and cholangiocarcinoma may indicate the paraneoplastic nature of alopecia as a rare complication of this rare tumour in humans. This also implies that common interspecies mechanism(s) must exist as far as this paraneoplastic complication is concerned.

Alopecia: a common paraneoplastic manifestation of cholangiocarcinoma in humans and animals: Figure 1