The aim of this study is to investigate the positive association between the presence of renal cysts and AAA. Patients and Methods: A retrospective chart review on the clinical data of 396 consecutive patients, who underwent CT scans for preoperative evaluation of thoracic and cardiovascular surgery in Sapporo Medical University from the period of January 2007 to December 2008, was conducted. Results: When comparing patients with renal cysts (n = 164) to those without (n = 233), there was a statistically significant difference between the presence of renal cysts and male gender (p = 0.007), hypertension (p = 0.003), and AAA (p < 0.001) on univariate analysis. In addition, when comparing patients with AAA to those without, although COPD but not AAA was associated with renal cysts in less than 65 years old, the presence of renal cysts was the strongest association with AAA among patients belonging to the 65 to 74 years old group and over 75 years old group on multivariate analysis. Conclusions: There is a statistically higher incidence of renal cysts in patients with AAA compared to patients without AAA in the group of elder cardiovascular patients. It is likely that AAA and renal cysts share a common pathogenesis.

Hydrothorax due to pleuroperitoneal communication is a rare complication in patients undergoing continuous ambulatory peritoneal dialysis (CAPD). One of the problems of this complication is the need to cease CAPD, which means that the patient must shift completely to hemodialysis. Therefore, a quick, minimally invasive, and complete surgical repair of the pleuroperitoneal communication is required. We recently treated a patient who had developed a right hydrothorax soon after the introduction of CAPD. Clinical examination led to a diagnosis of pleuroperitoneal communication. The patient was successfully treated by complete thoracoscopic repair of the communication. We could precisely identify the defective site on the diaphragm using the dye-added CAPD solution method. CAPD was restarted 5 days after the operation, and there was no recurrence of hydrothorax after the operation.

Endovascular stent-grafting for patients with anastomotic pseudoaneurysms of the thoracic aorta following thoracic aortic surgery has become a possible optimal treatment. However, long-term outcome remains unclear, and periodical follow-up is required.

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