A case of multiple dermoid sinuses in the dorsal cervical and cranioth
oracic regions in an adult chow chow dog is described. One sinus did n
ot open on the skin surface. This is the first reported case of the co
ndition in this breed and the first time absence of the sinus opening
on the skin is described. The use of the term pilonidal sinus to descr
ibe this condition is challenged.