[Primary pulmonary myxoid liposarcoma discovered fortuitously].

We report a fortuitous discovery of primary pulmonary myxoid liposarcoma in an HIV-positive patient. Primary pulmonary localizations are uncommon. Generally, pulmonary localizations are metastatic. There is a male predominance and diagnosis is generally made around 40 years of age. The two main features of liposarcoma are the large tumor size and the complex histology that evolves over time. Pathology findings are rarely reproducible and vary from one pathologist to another. Macroscopically, liposarcomas can mimic benign tumors. The risk of recurrence is high after simple enucleation due to microscopic extracapsular extensions. Surgery remains the predominant treatment. Wide complete excision, if possible, provides long-term survival.