An aggressive form of Kaposi's sarcoma has been reported in patients with acquired immunodeficiency syndrome. Although pulmonary symptoms may constitute the initial complaint, Kaposi's sarcoma is generally detected because of cutaneous lesions. The chest radiograph reveals a distinctive, poorly marginated, nodular pattern in the lungs. Coarse, linear densities are also observed, and pleural effusion is seen in many patients. Bilateral distribution is most common. Pulmonary hemorrhage occurs and rarely may result in dense air-space consolidation seen on the chest radiograph.
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