A 49-year-old man without heart murmur was admitted with fever because of bacteremia following a tooth extraction. Antibiotics rapidly alleviated the fever; however, a small nodule in the pulmonary artery was identified on computed tomography (CT). When the patient experienced chest discomfort with fever, CT demonstrated the absence of the nodule and the appearance of an abnormal lung opacity, and echocardiography showed turbulent retrograde flow in the pulmonary artery. We had the rare opportunity to follow a case of pulmonary bacterial endarteritis and subsequent pulmonary embolism with clinically silent patent ductus arteriosus (PDA) that was confirmed by 3-dimensional CT.

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We report a case of mucoepidermoid carcinoma of the anal canal. A 66-year-old man was admitted to our hospital complaining of anal pain and hematochezia. Contrast-enhanced computed tomography showed an enhanced tumor, 60 mm in size, from the anus to the lower part of the rectum, and in addition, the right inguinal lymph node was swollen. Colonoscopic examination revealed a submucosal tumor-like lesion with central ulceration in the anal canal. The biopsy specimen suggested mucoepidermoid carcinoma, and abdominoperineal resection with D3 lymphadenectomy including the right inguinal lymph node was performed. Gross examination of the resected specimen revealed an ulcerated tumor, 60 mm 60 mm in size, from the perianal skin to the lower part of the rectum. Pathological examination resulted in mucoepidermoid carcinoma, pA, int A, INFb, ly0, v1, pN2(5/24). No recurrence has been found for 2 years post-operation. Mucoepidermoid carcinoma is a rare histological type of anal cancer, and this case presented an interesting morphological type.