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Objective: The purpose of this study is to examine the sexual behavior relationship with HIV/AIDS on homosexuals in Palu City and its risk factors. Method: The study was held using a case-control with a retrospective study. The number of samples on the case–control group is 90 respondents with 1:1 comparison. Sampling techniques and data collection based on the medical record of VCT in Anutapura Hospital by using the questionnaire. The data is processed using the univariate analysis, bivariate analysis by using chi-square, and multivariate analysis by using logistic regression analysis. Results: Based on bivariate analysis gained that there is a significant relationship of sexual behavior in homosexuals with HIV/AIDS in Palu City. Dependent variable is HIV/AIDS while the independent variable are the number of pairs p = 0.004 (OR = 12.6); Anal sex p = 0.003 (OR = 3.6); Oral ejaculation p = 0.002 (OR = 14.2); Oral sex-licking/rimming p = 0.035 (OR = 2.5); Fingering p = 0.019 (OR = 2.8); and interfemoral coitus p = 0.011 (OR = 3.0). Based on the modeling of multivariate logistic regression analysis obtained, dominant variables are the number of pairs, anal sex, and interfemoral coitus, so the most dominant variables are the number of pairs with OR = 20.8. Homosexuals that have more than one couple do bareback sex, and interfemoral coitus have an estimated probability of HIV/AIDS in Palu City is 83.7%. Conclusion: There is a significant influence between sexual behavior against HIV/AIDS in homosexuals at Palu City in 2020.

Fundamento: La atrofia multisistémica es un trastorno neurodegenerativo esporádico, que puede comenzar alrededor de los 60 años y ocasiona invalidez progresiva hasta la dependencia total de un cuidador. Presentación de caso: Se presenta el caso de un hombre de 57 años de edad que comenzó con cuadros de inestabilidad para la marcha y torpeza para realizar las actividades cotidianas y se interpretó como una enfermedad de Parkinson con pobre respuesta a la levodopa con bencerazida. Durante su estudio agravó los síntomas neurológicos y al realizar una tomografía axial computarizada de cráneo se evidenció atrofia cerebelosa y frontal que apoyó el diagnóstico de una atrofia multisistémica tipo C. Recibió tratamiento con levodopa con bencerazida, amantadina, y hubo alivio sintomático de la hipotensión ortostática. Conclusiones: El diagnóstico precoz de la enfermedad se dificultó por su comienzo similar a otras enfermedades neurodegenerativas, y su evolución ocasionó pérdida progresiva del validismo del paciente, sin que el tratamiento modificara el curso de la misma. DeCS: ATROFIA DE MÚLTIPLES SISTEMAS; ENFERMEDADES NEURODEGENERATIVAS; TRASTORNOS PARKINSONIANOS; DEGENERACIÓN ESTRIATONIGRAL Palabras clave: enfermedades neurodegenetativas, atrofia multisistémica, atrofia cerebelosa, ataxias cerebelosas, parkinsonismo, enfermedad de parkinson, hipotensión ortostática. ABSTRACT Background: The multiple system atrophy is a sporadic neurodegenerative disorder that may begin around age 60 and causes progressive disability to total dependence on a caregiver. Case report: A case presentation of a 57 year-old man who started with signs of unsteady gait and clumsiness in performing daily activities and which was interpreted as Parkinson's disease with poor response to levodopa with benserazide. During his study the patient showed worsening neurological symptoms and a computerized tomography of the skull was performed corroborating head and front cerebellar atrophy which supported the diagnosis of multiple system atrophy type C. He received treatment with levodopa together benserazide, and amantadine and a symptomatic relief of orthostatic hypotension was observed. Conclusions: Early diagnosis of the disease was hindered by its similar onset to other neurodegenerative diseases and its evolution caused progressive loss of the patient´s walking ability and the treatment did not modify the course of the disease. MeSH: MULTIPLE SYSTEM ATROPHY; NEURODEGENERATIVE DISEASES; PARKINSONIAN DISORDERS; STRIATONIGRAL DEGENERATION. Keywords: neurodegenerative diseases, multiple system atrophy, cerebellar atrophy, cerebellar ataxias, parkinsonism, Parkinson's disease, orthostatic hypotension.