[Pseudotumoral abdominal granuloma concomitant with immune reconstitution after antiretroviral treatment].

BACKGROUND: Use of powerful multiple-drug antiretroviral regimens can significantly raise CD4+ counts restoring immune function, but in certain cases, leading to inflammatory reactions.

CASE REPORT: An HIV-infected patient developed a mycobacteriosis of the digestive tract when his CD4 count fell below 5/mm3. He was given antimycobacterial treatment in combination with an effective triple antiretroviral regimen. At two years, the clinical situation was controlled with persistent optimal response (CD4 = 338/mm3 HIV-RNA < 500 copies/ml); the antimycobacterial regimen was discontinued. One year later the patient still had a CD4+ count above 500/mm3 but developed a voluminous mesenteric mass invaded by a CD68+ histiocyte proliferation. No causal agent could be identified. The clinical course was favorable after reintroducing antimycobacterial treatment combined with short-term corticosteroid therapy.

DISCUSSION: Reconstitution of the immune system after long-term use of the new antiretroviral therapies raises the question of whether anti-infectious prophylaxis should be maintained. However, possible reactions to earlier pathogens after restoration of specific immunity would warrant secondary prophylaxis even in patients responding to powerful antiretroviral combinations.