Epidemiological and clinical features of AIDS-Associated Kaposi′s sarcoma in Northern Nigeria

Abstract

Introduction : The incidence of AIDS-associated Kaposi's sarcoma (AAKS) is increasing in the West African sub-region. The objective of this study was to describe the epidemiologic and clinical features of AAKS. Materials and Methods : This study was carried out in a tertiary health center with a federal government supported AIDS treatment program in Zaria, Nigeria. The subjects comprised 137 consecutive patients evaluated for AAKS from 2006 to 2011. Following evaluation appropriate specimens were taken for histologic, virologic, and immunologic assessment. Result : There were 137 patients representing 1.4% of HIV infected patients seen during the study period. The male to female ratio was 1.3:1. Their ages ranged from 2 to 58 years, mean of 32 ± 6 and females were younger than males. Mean duration of symptoms was 4.2 ± 1.5 months. Kaposi's sarcoma was the AIDS-defining disease in 95 (69.3%) patients while in 42 (30.7%) it was diagnosed between 1 and 15 months after the diagnosis of HIV infection. The lower limbs were the most frequent sites of lesions. Females had more disseminated lesions involving an increased number of lesions at multiple anatomical sites compared with more localized lesions in the males (OR 2.7, 95% CI 1.5-7.0). The CD4 count ranged from 19 to 798 cells/mm 3 , median 132; interquatile range 102-317 cells/mm 3 while the median HIV RNA copies/ml of plasma was 51,723 (ranged 250-917, 254).Conclusion : The prevalence of AAKS is increasing in our institution. Female patients were younger and had more disseminated disease that progressed faster than in males. Timely identification of HIV-infected patients is essential to avoid the consequences of immunological deterioration associated with delayed anti-retroviral therapy.