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A 61-year-old woman, smoker, with asymptomatic PLCH and bone involvement. Diagnosis obtained by scapular biopsy. a A 3-mm collimated CT demonstrates nodular infiltrates with irregular borders. Some minimal faint cysts are also appreciable (arrow). b A follow-up CT scan 6 months post-diagnosis shows almost complete regression of pulmonary nodules. Improvement occurs with smoking reduction, but not cessation
