Eight patients from Uganda, Sudan, Nigeria, and Zaire presented with swelling of the eyelids, proptosis, or conjunctival granulomas. In 5 patients the cause was Mansonella perstans; in 1, it was a Wuchereria bancrofti-like worm; and in 2, an unidentifiable worm. The morphologic features and histopathologic changes in the conjunctiva and periorbital fat are described and illustrated.
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Baird et al. (1988) studied this question.