Objective To investigate the pathologic diagnosis and ultrastructure features of primary pulmonary cryptococcosis (PC). MethodsRetrospective analysis was made on 37 cases of PC with histochemical stain and light micro...Objective To investigate the pathologic diagnosis and ultrastructure features of primary pulmonary cryptococcosis (PC). MethodsRetrospective analysis was made on 37 cases of PC with histochemical stain and light microscopy observations. Transmission electron microscopy was performed on 19 cases. ResultsThree of 37 cases were confirmed by fine needle aspiration biopsy while the other 34 patients by open-chest exploratory operation.Pathologic findings: cryptococcosis neoformans (CN) were detected in all cases,2 with gelatinous lesions and 35 non-casating granuloma. The revealing rate of CN with the mucicarmine stain(MC),periodic acid-Schiff stain(PAS), alcian blue (AB) and Grocott methenamine-silver (GMS) was 85.2% (23/27), 97.3% (36/37), 64.9% (24/37) and 96.3% (26/27), respectively. All CNs detected by transmission electron microscopy had capsules and most of them possessed simple structure with undeveloped cellular organelles and cell cataplasia. Some CNs had cellular nucleus, nucleoli, mitochondria and vacuoles. The detective rate of CNs by transmission electron microscope was 89.5 % (17/19). ConclusionAbsent of specific clinical manifestations and radiographic features, fine needle aspiration biopsy and open biopsy remain the chief approaches in the diagnosis of PC. It could be further helpful by using light microscopy and transmission electron microscopy to make definitive diagnosis and differential diagnosis as well as MS, GMC and PAS histochemical staining.展开更多
文摘Objective To investigate the pathologic diagnosis and ultrastructure features of primary pulmonary cryptococcosis (PC). MethodsRetrospective analysis was made on 37 cases of PC with histochemical stain and light microscopy observations. Transmission electron microscopy was performed on 19 cases. ResultsThree of 37 cases were confirmed by fine needle aspiration biopsy while the other 34 patients by open-chest exploratory operation.Pathologic findings: cryptococcosis neoformans (CN) were detected in all cases,2 with gelatinous lesions and 35 non-casating granuloma. The revealing rate of CN with the mucicarmine stain(MC),periodic acid-Schiff stain(PAS), alcian blue (AB) and Grocott methenamine-silver (GMS) was 85.2% (23/27), 97.3% (36/37), 64.9% (24/37) and 96.3% (26/27), respectively. All CNs detected by transmission electron microscopy had capsules and most of them possessed simple structure with undeveloped cellular organelles and cell cataplasia. Some CNs had cellular nucleus, nucleoli, mitochondria and vacuoles. The detective rate of CNs by transmission electron microscope was 89.5 % (17/19). ConclusionAbsent of specific clinical manifestations and radiographic features, fine needle aspiration biopsy and open biopsy remain the chief approaches in the diagnosis of PC. It could be further helpful by using light microscopy and transmission electron microscopy to make definitive diagnosis and differential diagnosis as well as MS, GMC and PAS histochemical staining.
