Detection of Cryptococcus neoformans in bronchial lavage cytology: report of four cases

Four cases of pulmonary cryptococcosis were diagnosed by cytological detection of Cryptococcus neoformans in bronchial lavage. Three patients had underlying diseases, but not HIV infection. The chest X-rays showed 2 patients with nodular lesions and 2 with cavitary lesions. The cryptococcal antigen in the serum was positive in all four patients. In the cytology of bronchial lavage, Cryptococcus neoformans was detected after period-acid-Schiff (PAS) staining and was cultured in Sabouraud-dextrose agar. The cytology of bronchial lavage is useful for the rapid diagnosis of pulmonary cryptococcosis.