Glossitis, Ulcerative

Cat
Relatively common.
Youngish to middle age (mainly - although can be any age).
Unable to eat although wants to. Hurts to open mouth.
Whole of back of mouth covered in ulcerative granulation tissue.
Chronic, tends to start at angle of jaw (bilateral), progression quite slow but over weeks affects whole of back of mouth.
May also affect anatomy and physiology of the tongue.

Epithelium lost over whole of mucosa, lots of macrophages, lymphocytes and proliferating fibrous response at base.

Probably viral.
Calicivirus found in 7-80%, also often find picorna virus and Feline Immunodeficiency Virus
Probably calici virus that starts it.
Also owners often claim develops after 'having cold' prior to it.
Calici virus infection may be followed by autoimmune / exaggerated immune response which produces lesions.
Will heal eventually, but takes time and cat loses lots of condition.