## Overview Habronemiasis at the medial canthus produces a yellow to reddish-brown ulcerated granulomatous mass at the inner corner of the eye. It contains gritty sulfur granules, causes intense rubbing, and can damage the nasolacrimal opening. It is seasonal and often recurs. ## Causes Flies depositing Habronema larvae at the moist medial canthus. ## Diagnosis Characteristic location and appearance. Biopsy if tumor is a concern. ## Treatment Systemic and topical ivermectin, anti-inflammatories, and surgical debulking when the mass is large. Protect the eye from self-trauma. ## Recovery and Prognosis Good, though annual recurrence is common. Nasolacrimal damage may persist. ## Prevention Fly masks and rigorous fly control.
ulcerated granulomatous mass at the medial canthus; sulfur granules; intense rubbing; possible nasolacrimal damage; seasonal recurrence
## Overview Habronemiasis at the medial canthus produces a yellow to reddish-brown ulcerated granulomatous mass at the inner corner of the eye. It contains gritty sulfur granules, causes intense rubbing, and can damage the nasolacrimal opening. It is seasonal and often recurs. ## Causes Flies depositing Habronema larvae at the moist medial canthus. ## Diagnosis Characteristic location and appearance. Biopsy if tumor is a concern. ## Treatment Systemic and topical ivermectin, anti-inflammatories, and surgical debulking when the mass is large. Protect the eye from self-trauma. ## Recovery and Prognosis Good, though annual recurrence is common. Nasolacrimal damage may persist. ## Prevention Fly masks and rigorous fly control.
ulcerated granulomatous mass at the medial canthus; sulfur granules; intense rubbing; possible nasolacrimal damage; seasonal recurrence