CASE PRESENTATION: 23 years old, nonsmoker, mother of a seven month baby. November 2013: during late pregnancy, cough, mucoid sputum and dyspnea, atributed to anti-influenza vaccine received this month. Denied chest pain, hemoptysis, fever and decided to wait child-birth in December to be treated, but only in January 2014 she started antibiotic with no improvement. Weight loss of 14 Kg in 6 months. Monthly repeated chest X-rays and changed antibiotics. June 2014: using Azithromicin and Cefuroxime, was admited in a terciary hospital with poor general condition, crackling rales and diffuse bilateral wheezing, O2 saturation: 85-90% under oxygen. Chest X-ray:Extensive billateral consolidation, pneumothorax on the right side. Computarized tomography (CT): billateral consolidation, especially in the lower lobes and basal portions of the upper lobes. Negative HIV Rapid Test and AFB search in sputum. Leukocytosis (21,580/mm3) with 17576 (83%) neutrophils, 1365 (5.4%) eosinophils, hemoglobinuria (+++). Negative serology for viral hepatites and HIV. Anatomopathology of lung sample obtained by transbronchial biopsy: adenocarcinoma with invasive focus in bronchial wall. Treated with Carbotaxol (negative EGFR gene excluded additional oral chemotherapy) for six months, she died in December 2014 due to sepsis secondary to KPC lung infection.