A peculiar squamous dysplastic lesion presenting as a ground-glass opacity: a case report.

An ill-defined, 15-mm nodular lesion in the left lower lung was noted on a radiograph during an annual health check-up of a 61-year-old female who had never smoked. A physical examination and laboratory study results were unremarkable. Chest CT demonstrated a well-demarcated pure GGO nodule in the inferior lobe of the left lung. The nodule, measuring 15613 mm, was located in the anteromedial basal segment (S8) (fig. 1a). A positron emission tomography scan showed no accumulation of radioactivity in the lesion. The patient underwent S8 segmentectomy of the left lung with lymph node sampling.