The occurrence of hairs in the median sulcus of the tongue in two dogs
, a 7-year-old Rottweiler and a 10-year-old Cocker spaniel, is reporte
d as an incidental observation at necropsy. The gross pathology of bot
h cases and the histological and scanning electron microscopical findi
ngs in one case indicated a heterotopic development of the hairs, with
secondary inflammation. The term Pili heterotopici mediani linguae is
suggested. (C) 1997 W.B. Saunders Company Limited.