: PURPOSE : To evaluate the utility and safety of drainage catheter installation for psoas/iliopsoas muscle abscesses using a one-step technique under the guidance of real-time computed tomography (CT) fluoroscopy. MATERIALS and METHODS : Ten psoas or iliopsoas muscle abscesses in 7 patients that were treated with percutaneous drainage were included in this study. All drainage procedures were carried out using a one-step technique under real-time CT fluoroscopic guidance. RESULTS : The drainage catheter insertion was performed successfully with the one-step technique in all lesions. Improvements in the patients' symptoms and blood test results were seen after the drainage procedure in all cases. In addition, postoperative CT scans demonstrated that the abscesses had reduced in size or disappeared in all but one patient, who was transferred to another institution while the drainage catheter was still in place. No major complications were seen in any case. CONCLUSION : The one-step procedure is simple to perform. The percutaneous drainage of psoas or iliopsoas muscle abscesses with the one-step technique under real-time CT fluoroscopic guidance is accurate and safe. Moreover, compared with the two-step technique the one-step procedure results in a shorter drainage procedure and exposes the patient and operator to lower amounts of radiation.

The present study finds that not only accumulation in the teres minor muscles but also accumulation in the muscles between the radioulna near the elbow occurs significantly more frequently on the side of intravenous administration compared to the contralateral side.

An incidental vascular abnormality was identified in a female patient in her 70s with a history of malignant lymphoma. Contrast-enhanced computed tomography (CT) scans revealed a pulmonary artery aneurysm (PAA) originating at the A10 branch of the right pulmonary artery (10 9 9 mm in size), which involved three distal branches at the aneurysmal sac. Retrospectively, this PAA was identified on CT images two years prior, and has been growing since. Endovascular embolization was performed with microcoils that were placed in the aneurysmal sac and the distal and proximal sites of the parent artery, achieving complete resolution of the PAA without complications. Coil embolization can be one of the treatment options in management of the unruptured PAA, although further investigations are necessary.

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