Bronchioloalveolar carcinoma (BALC) is a sub-type of adenocarcinoma, accounting for 3-5% of all lung cancer cases. It is characterized by peripheral location in lung parenchyma, without visible changes in main bronchi and tumor spread occurs along the walls of the peripheral airspaces without destruction of the pulmonary interstitium. Their carcinomas were classified into three clinicopathologic types: nodular or tumoral, pneumonic, and diffuse types. The disease may take an asymptomatic form for several months or even years. This form of cancer spreads by way of air tracts creating multiple changes in lungs. Metastases to lymph nodes and other organs occur rarely. It is difficult to provide a correct diagnosis. The complete surgical resection of localized BAL C offers the best chances of long-term survival. Patient prognosis is usually more positive than in other histological types, since the disease is frequently diagnosed at its early development stages.