Objectives:This study aimed to assess the types of vertebral segments at the thoracolumbar junction as they relate to the most caudal ribs, to evaluate the reliability of this assessment using axial computed tomography (CT) with curved planar reformatting (CPR) images, to describe the morphologic characteristics of thoracolumbar transitional vertebra (TLTV), to introduce a new classification system for TLTV, and to evaluate the reliability of the classification system using axial CT with CPR images.Methods:This was a retrospective review of 744 consecutive patients who underwent spine CT imaging that included the thoracolumbar junction. Two radiologists (readers 1 and 2) independently evaluated the axial CT with CPR images for all cases (n=744). Each radiologist differentiated the vertebral segments at the thoracolumbar junction as TLTV or non-TLTV (thoracic segment or lumbar segment). In addition, each radiologist classified the 94 patients with TLTV using a novel classification system. Interobserver agr...

Purpose Urologists and radiologists should be aware of the computed tomography (CT) scans appearance of laparoscopic partial nephrectomy (LPN) with the various hemostatic agents since they may confound the interpretation of these radiographic findings. We report the various postoperative CT scan appearance and changes after LPN Material and methods We reviewed CT scans retrospectively (within 3 months) of 86 patients who underwent LPN using various hemostatic agents between March 2008 and July 2014. We analyzed the CT findings after LPN, including postoperative changes, tumor recurrence, and complications. We also discuss changes in abnormal features, such as mass-like lesions and gas formation, on follow-up CT scans.. Results To categorize the postoperative changes, we classified them according to their specific CT findings. i) a combination of perinephric stranding and postsurgical fluid collection (n = 46), ii) mass-like lesions (n = 35), iii) a parenchymal defect (n = 2), iv) local recurrence at the surgical site (n = 1), v) a large hematoma as a complication after LPN (n = 2), vi) gas pockets, which may be a response to postsurgical fluid collection around soft tissue (n = 35), vii) fat at the excision site (n = 2; Fig. 7); and viii) contrast extravasation in the delayed phase (n = 1). Mass-like lesions were visible in 35 cases. The average change in size of bolster masses was –1.19 mm/month. However, the overall change in enhancement of mass-like lesions was not significant over time. Foci of gas were noted in 16 patients at the resection site in the first follow-up period (<3months), as late as 40 days after surgery. Conclusions Knowledge of CT imaging features and changes in hemostatic agents following LPN is important in interpreting postoperative CT scans, as postoperative changes can be confused with tumor recurrence and can mimic abscesses

The aim of this study was to investigate factors affecting tumor necrosis with transcatheter arterial chemoembolization (TACE). Factors associated with early hepatocellular carcinoma recurrence after curative hepatectomy were also evaluated. Data of 51 patients who underwent surgery after a single session of TACE at a single university hospital were retrospectively analyzed. Factors that might affect tumor necrosis were determined by evaluating the TACE approach and by analyzing computed tomography and TACE findings, pathologic reports, and laboratory findings. In univariate analysis, microvascular invasion (MVI), radiological capsule appearance on the computed tomography, chronic hepatitis B, diabetes mellitus and serum albumin, MVI were significantly associated with tumor necrosis by TACE (P < .02). In multivariate analysis, MVI was the only statistically significant factor in TACE-induced tumor necrosis (P = .001). In univariate and multivariate analysis, MVI was the strongest factor for recurrence-free survival rate within 2 years (P = .008, P = .002). MVI could be a crucial factor in determining TACE as an initial treatment for hepatocellular carcinoma. MVI is also a strong indicator of recurrence within 2 years after curative hepatic resection.

유희정, et al. J Korean Soc Radiol. 2023 Oct;84:e113. /Synapse/10.3348/jksr.2023.0063

박재춘, et al. J Korean Soc Radiol. 2020 Nov;81(6):1424-1435. https://doi.org/10.3348/jksr.2019.0154