Pulmonary Kaposi Sarcoma in the Era of Antiretroviral Therapy: A Case Series.

Kaposi sarcoma (KS) is an angioproliferative neoplasm that affects the skin and lymph nodes. Human herpesvirus-8 (HHV-8) triggers KS by infecting the endothelium and inducing angiogenesis through the production of vascular endothelial growth factors and cytokines. KS is characterized by purplish or hyperpigmented plaques involving the skin and mucous membranes, and visceral involvement is very rare. Pulmonary KS (PKS) is an exceedingly rare visceral manifestation of KS and has a poor prognosis. PKS often presents with cough, hemoptysis, pleuritic chest pain, fever, and weight loss. In this case series, we share our experience in diagnosing and treating two patients with PKS. We also provide a concise review of the epidemiology, signs and symptoms, diagnosis, and management of this rare condition.