This is a rare case of extensive multifocal type of Kaposi's disease which developed in a young child. The patient's age, the major and progressive weight loss, the appearance of adenopathies and of a suspected tuberculous pleuritis, the evolution of cutaneous lesions extension, followed by death in short time (5 years) led us to suspect an eventual association with HIV infection. Serologic tests performed three times which remained negative and the absence of other important AIDS signs excluded this diagnostic.