RESUMEN
Non-Hodgkin lymphoma is frequently seen in AIDS patients usually affecting the central nervous system (CNS), especially the leptomeninges and the cerebral hemispheres. The epidural involvement is rarely described, ranging from 3.5% to 8.3% among the CNS sites. The authors present a case of disseminated non Hodgkin lymphoma associated to vacuolar myelopathy in a 27 years-old male patient with AIDS emphasizing the importance of this differential diagnosis in the myelopathies of AIDS.
Asunto(s)
Síndrome de Inmunodeficiencia Adquirida/complicaciones , Linfoma Relacionado con SIDA/patología , Linfoma no Hodgkin/etiología , Mielitis Transversa/etiología , Enfermedades de la Médula Espinal/etiología , Vacuolas/patología , Síndrome de Inmunodeficiencia Adquirida/patología , Adulto , Diagnóstico Diferencial , Humanos , Linfoma no Hodgkin/complicaciones , Linfoma no Hodgkin/patología , Masculino , Mielitis Transversa/diagnóstico , Mielitis Transversa/patología , Enfermedades de la Médula Espinal/diagnóstico , Enfermedades de la Médula Espinal/patologíaRESUMEN
Using a modified enzyme-linked immunosorbent assay that included dissociation of antigen antibody complexes with 6M urea solution, we analyzed the avidity of Toxoplasma-specific IgG in aqueous humor and serum samples from 24 patients with toxoplasmic chorioretinitis. As a control, we studied aqueous humor and serum samples from 14 cataract patients without history of uveitis and serum samples from 10 patients with recent primary systemic toxoplasmic infection without ocular lesions. IgG avidity was markedly lower in aqueous humor samples from patients with toxoplasmic chorioretinitis than in serum samples, despite those samples presenting higher levels of Toxoplasma-specific IgG than in serum samples. The detection of the low-avidity Toxoplasma-specific antibodies can offer a valuable aid to make a specific etiologic diagnosis and perhaps contribute to understand the pathogenic mechanisms of ocular toxoplasmosis.