Pulmonary zygomycosis rarely occurs without pre-existing immunocompromised
disease. A 72-year-old male was found to have a nodular shadow (3 cm x 4 cm
) in the right S8 and S9 on a chest X-ray. Right lower lobectomy was perfor
med and histological examination of the resected material demonstrated pulm
onary zygomycosis. Hyphae stained positively not only with Grocott-Gomori m
ethenamine silver staining, but also with an anti-Rhizopus oryzae polyclona
l antibody.