Bronchioloalveolar carcinoma (BAC) represents a
unique and small subgroup of bronchogenic carcinoma
that is characterized by the proliferation of welldifferentiated
tumor cells along the walls of alveoli with
preservation of the underlying lung architecture. It can
present as a localized discrete lesion or with a diffuse multifocal
pattern involving one or both lungs. Pulmonary
recurrence without systemic dissemination is often observed
after lung resection for multifocal BAC, and survival
beyond 2 years is uncommon.4,5 Death usually occurs as a
result of pulmonary failure secondary to tumor replacement
of the functioning lung.4-6