Melanoma ungueal e vitiligo: relato de caso / Ungueal melanoma and vitiligo: case report

O melanoma ungueal é uma forma de apresentação rara do melanoma. É frequente o diagnóstico tardio. Geralmente afeta polegar ou hálux e a maioria dos pacientes é de meia idade ou idosos de pele escura. A associação entre melanoma e vitiligo é tem sido descrita há mais de 50 anos e os pacientes acometidos tem apresentado maior sobrevida sugerindo resposta imune ao melanoma. O objetivo deste relato é descrever um caso de melanoma ungueal com surgimento de linfonodo inguinal e vitiligo associado diagnosticado tardiamente com posterior evolução para doença sistêmica...

Subungual melanoma is a rare clinical entity of melanoma. It usually involves an unsuspecting lesion in the thumb or big toe, thus late diagnosis. Majority of patients are middle-aged or older, usually of dark skin ethnicity. The association between melanoma and vitiligo has been described for over 50 years, showing increased survival rates in affected patients suggesting immune response to melanoma. The objective of this report is to describe a clinical case of nail melanoma, presenting as enlargened unilateral inguinal lymph node associated with rapid and progressive vitiligo. However, investigations proved late diagnosis,with subsequent progression of the disease...

Hyponatremia, acute kidney injury, and mortality in HIV-related toxoplasmic encephalitis

BACKGROUND: There are no reports on hyponatremia and acute kidney injury (AKI) involved in the course of HIV-related toxoplasmic encephalitis (TE). The main objective of this study was to describe the occurrence of hyponatremia and its relationship with AKI and mortality in HIV-related toxoplasmic encephalitis (TE). METHODS: This was a retrospective cohort study on patients with HIV-related TE. AKI was considered only when the RIFLE (risk, injury, failure, loss, end-stage) criterion was met, after the patient was admitted. RESULTS: A total of 92 patients were included, with a mean age of 36 ± 9 years. Hyponatremia at admission was observed in 43 patients (46.7%), with AKI developing in 25 (27.1%) patients during their hospitalization. Sulfadiazine was the treatment of choice in 81% of the cases. Death occurred in 13 cases (14.1%). Low serum sodium level correlated directly with AKI and mortality. Male gender (OR 7.89, 95% CI 1.22-50.90, p = 0.03) and hyponatremia at admission (OR 4.73, 95% CI 1.22-18.30, p = 0.02) were predictors for AKI. Independent risk factors for death were AKI (OR 8.3, 95% CI 1.4-48.2, p < 0.0001) and hyponatremia (or 9.9, 95% ci 1.2-96.3, p < 0.0001). CONCLUSION: AKI and hyponatremia are frequent in TE. Hyponatremia on admission is highly associated with AKI and mortality.