Pulmonary nodules
OVERVIEW: What every practitioner needs to know about pulmonary nodules. A pulmonary nodule is a round lesion less than 3 cm in diameter within the pulmonary parenchyma (completely surrounded by lung tissue). When present as a single lesion, a pulmonary nodule is sometimes referred to as a “solitary pulmonary nodule” (SPN) or “coin lesion.” A…