From Cow

Dermoids are a dermatological disorder of cattle characterised by a cyst (teratoma) that contains within it developmentally mature skin.

In cattle, dermoids are usually associated with important structures such as the eye, nasolacrimal ducts or other vital organs[1], but can be found in aberrant locations such as the ventral neck[2] and in internal organs such as the ovary[3]. Dermoids usually appear on the face or nasolabial planum as swellings that are usually non-pruritic[4].

In valuable cattle, surgical excision is usually curative.


  1. Steinmetz A et al (2009) Surgical removal of a dermoid cyst from the bony part of the nasolacrimal duct in a Scottish highland cattle heifer. Vet Ophthalmol 12(4):259-62
  2. Baird AN et al (1993) Dermoid cyst in a bull. J Am Vet Med Assoc 202(2):298
  3. Edwards JF et al (2002) Three cases of ovarian epidermoid cysts in cattle. Vet Pathol 39(6):744-746
  4. Brudenall DK et al (2008) Bilateral corneoconjunctival dermoids and nasal choristomas in a calf. Vet Ophthalmol 11(3):202-206