1) Dermoid Cysts
This is a tumour, not a malignant one though. I don’t see much of this in Guyana, but very long ago, when I was practising in Europe, several dogs presented with this condition whereby hair was growing from the surface of the eyeball.
Actually, this spherical mass is really surrounded by an envelope of skin which has follicles from which hairs grow. Because of this envelope, one speaks of a cystic structure (a cyst, a cavity).
But there is a difference between hair growing on the skin (surface of the body) and hair growing out of a cyst. In the latter instance, there is a closed cavity (cyst). This means that the hair cannot be shed, and any other debris which has accumulated cannot be