Mycetoma : Madurella grisea - Granules

This photograph depicts various sized phaeoid granules of the fungus Madurella grisea. The granules, which are discharged through multiple draining sinuses of the mycetoma, are composed of matted masses of dark-walled, septate, branching hyphae. The fungus enters the human body via repeated, usually occupation-related trauma, and most commonly involves the foot. The disease process (mycetoma) may take years to develop. Image courtesy of: CDC Public Health Library.