Lymphangioleiomyomatosis (LAM) is a rare, proliferative lung disease, leading to progressive damage of their structure and is a member of the PEComa neoplasm family (perivascular epithelioid cell tumors). In the patients, solid-cystic masses described as lymphangioleiomyoma or extrapulmonary LAM (E-LAM) can occur. E-LAM foci have been described in the mediastinum, supraclavicular lymph nodes, the liver, walls of the small and large intestine, the pancreas, mesentery. E-LAM masses can attain very large sizes -tumors 15-22 cm long have been described. On the basis of positive results of clinical trials sirolimus, a drug from the group of mTOR kinase inhibitors, was registered by the Food and Drug Administration (FDA) in May 2015 as the first and currently only drug for systemic LAM therapy. Sirolimus use is recommended in patients with LAM, accompanied by rapidly progressing deterioration of respiratory system function or FEV 1 ≤ 70% predicted value and in patients with pleural lymph exudate before applying invasive methods of treatment.