[Primary Lung Cancer Associated with Dilated Phase of Hypertrophic Cardiomyopathy;Report of a Case].

A 66-year-old man diagnosed as dilated phase of hypertrophic cardiomyopathy (D-HCM) was pointed out an abnormal shadow on routine chest radiography. The patient had past medical history of hypertension, congestive heart failure and chronic obstructive pulmonary disease. The computed tomography showed a 3.8 cm-sized tumor in the left lower lobe of the lung, and histopathological examination revealed squamous cell carcinoma (cT2aN0-1M0, cStage I B-II A). Cardiosonography showed diffuse hypokinesis from basal to mid area, and ejection fraction was 36.3%. Sporadic ventricular premature contraction was seen by the Holter electrocardiogram. The patient underwent left lower lobectomy with node lymph node dissection (ND1b). The circulatory condition of the patient was stable during surgery. After surgery, careful management of electrolytes and fluid infusion, and the regular medication was started again on the next day of surgery.