Spontaneous resolution of pterygium by auto-avulsion.

The exact pathogenesis of pterygia is not yet clearly understood. Most recent studies implicate fibroblastic proliferation as the essential histopathology in the condition. A case is presented in which spontaneous avulsion of the head of a pterygium occurred, with rapid resolution of symptoms. Such an avulsion suggests the presence of strong forces being exerted on the cornea by the pterygium. Fibroblastic activity could be responsible for the development of such forces. This case supports existing evidence for the primary nature of fibroblastic proliferation in the development of pterygia.