Histological changes in lymph nodes were evaluated in a prospective study of 124 homosexual men who presented with generalized lymphadenopathy. The histological changes were classified according to a classification system with three stages. HIV antibodies were present in 88% of the patients. The finding of one of the three histopathological stages was highly indicative--although not absolutely pathognomonic--for HIV infection. The subsequent course of HIV infection after biopsy was significantly correlated to the histopathological changes, but it was not possible to evaluate if the biopsy added new information to that already available. Among the group of HIV infected, immediate clinical consequences of lymph node biopsy were not observed (95% confidence limits 0-3.3%). In a retrospective investigation of 123 consecutive AIDS patients, it was found that lymph node histopathology had been able to identify secondary infections and neoplasms among 10%. It is concluded that lymph node biopsy is indicated in the HIV infected patients with unexplained generalized symptoms or with atypical enlargement of the lymph nodes. The prognostic significance of lymph node histology compared to other prognostic parameters of HIV infection, remains to be determined.
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