Clinical Characteristics and the Impact of Surgery and Chemotherapy on Survival of Patients With Advanced and Metastatic Bronchioloalveolar Carcinoma: A Retrospective Study

We retrospectively analyzed data from the clinical charts of 126 patients with bronchioloalveolar carcinoma (BAC) referred to the Ottawa Regional Cancer Center. The patient group consisted of 49 men (39%) and 77 women (61%). The mean age at diagnosis was 64 years. Most patients were smokers (85%). At diagnosis, 53% were stage Ia-IIIa and 47% were stage IIIb and IV. Forty-one percent of the patients with advanced and metastatic stages (IIIb, IV) underwent surgery. Multifocal disease was present at diagnosis in 41% of the patients, including 6% who had stage IIIb multifocal disease confined to a single lobe. Surgery was associated with prolonged survival in patients with multifocal unilobar or multilobar disease (P = 0.0001). While this apparent benefit of surgery may have been due to selection bias, it supports further exploration of surgery as therapy for multifocal disease. While patients receiving chemotherapy for advanced disease did not survive longer than patients not receiving chemotherapy, chemotherapy was used primarily in patients with more aggressive disease, suggesting that selection bias may have contributed to its apparent lack of benefit. Of the 30 patients treated with chemotherapy, only 3 (10%) achieved an objective response. One third of the patients (34%) developed distant metastases, with a predilection for the brain and bone.