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[Idiopathic Intrapulmonary Hematoma Need to Differentiate from Pulmonary Metastasis of Malignant Melanoma:Report of a Case].

A 74-year-old man had previously been treated for primary malignant melanoma of the bladder. Three years after surgery, 8 mm round nodule in the right lower lobe was found on chest computed tomography. The nodule increased to 11 mm after three months, and resected with a diagnosis of metastatic malignant melanoma. By pathology, it was diagnosed as an intrapulmonary hematoma.