1. A chronic infection involving the feet and characterised by the formation of localised lesions with tumefactions and multiple draining sinuses. The exudate contains granules that may be yellow, white, red, brown, or black, depending upon the causative agent. Mycetoma is caused by two principal groups of microorganisms:
A. Actinomycotic mycetoma is caused by actinomycetes, including species of streptomyces, Actinomadurae, and nocardia.
B. Eumycotic mycetoma is caused by true fungi, including species of madurella, exophiala, pseudallescheria, curvularia, Neotestudina, Pyrenochaeta, aspergillus, Leptosphaeria, Plemodomus, Polycytella, fusarium, phialophora, Corynespora, Cylindrocarpon, Pseudochaetosphaeronema, Bipolaris, and acremonium.
Synonym: fungous foot, madura boil, madura foot, maduromycosis.
2. Any tumour with draining sinuses produced by filamentous fungi.