PURPOSE: To assess the postoperative CT findings of aortic aneurysms or dissections treared by resection- and-graft replacement or continuous-suture graft-inclusion technique MATERIALS AND METHODS: We reviewed postoperative follow-up CT findings of 14 patients, 19 cases. There were 8 patients(10 cases) of aortic aneurysm and 6 patients(9 cases) of aortic dissecton which involved the thoracic aorta in 9 patients(13 cases) and abdominal aorta in 5 patients(6 cases). The interval of follow-up after operation was from 9 days to 2 year 9 months. On CT scans, we analyzed the appearance of graft materials, differences of CT findings between two surgical techniques, and normal or abnormal postoperative CT findings. RESULTS: Most of grafts appeared as hyperdense ring on precontrast scan, and all of them were not seperated from aortic lumen on postcontrast scan. On CT findings of patients who were operated by continuous-suture graft-inclusion technique, perigraft thrombus was concentrically located with sharp demarcation by native aortic wall and its density was homogeneous, but in cases of those operated by resection-and-graft replacement, perigraft hematoma was eccentrically located with indistinct margin and its density was heterogeneous and native aortic wall could not be delineated. In patients without complication, perigraft thrombus or hematoma(15 cases), perigraft calcification(11 cases), residual intimal flap(6 cases), graft deformity(4 cases), perigraft air(2 cases) and reconstructed vessels(1 case) were noted. And in one patient with complication, perigraft flow was noted with more increased perigraft hemaroma. CONCLUSION: Precise knowledge of the differences of CT findings between two surgical techniques and nor- mal postoperative CT findings is crucial to evaluate the postoperative CT findings in aortic aneurysm and dissection.
Aorta, Abdominal ; Aorta, Thoracic ; Aortic Aneurysm* ; Follow-Up Studies ; Hematoma ; Humans ; Thrombosis ; Tomography, X-Ray Computed ; Transplants

No abstract available.
Brain Neoplasms* ; Brain* ; Child* ; Humans ; Infant*

BACKGROUND: The ongoing Multicenter Prospective Cohort Study of Active Surveillance on Papillary Thyroid Microcarcinoma (MAeSTro) aims to observe the natural course of papillary thyroid microcarcinoma (PTMC), develop a protocol for active surveillance (AS), and compare the long-term prognosis, quality of life, and medical costs between the AS and immediate surgery groups. METHODS: This multicenter prospective cohort study of PTMC started in June 2016. The inclusion criteria were suspicious of malignancy or malignancy based on fine needle aspiration or core needle biopsy, age of ≥18 years, and a maximum diameter of ≤1 cm. If there was no major organ involvement, no lymph node/distant metastasis, and no variants with poor prognosis, the patients were explained of the pros and cons of immediate surgery and AS before selecting AS or immediate surgery. Follow-up visits (physical examination, ultrasonography, thyroid function, and questionnaires) are scheduled every 6 months during the first 2 years, and then every 1 year thereafter. Progression was defined as a maximum diameter increase of ≥3, ≥2 mm in two dimensions, suspected organ involvement, or lymph node/distant metastasis. RESULTS: Among 439 enrolled patients, 290 patients (66.1%) chose AS and 149 patients (33.9%) chose immediate surgery. The median follow-up was 6.7 months (range, 0.2 to 11.9). The immediate surgery group had a larger maximum tumor diameter, compared to the AS group (7.1±1.9 mm vs. 6.6±2.0 mm, respectively; P=0.014). CONCLUSION: The results will be useful for developing an appropriate PTMC treatment policy based on its natural course and risk factors for progression.
Biopsy, Fine-Needle ; Biopsy, Large-Core Needle ; Cohort Studies* ; Follow-Up Studies ; Humans ; Neoplasm Metastasis ; Prognosis ; Prospective Studies* ; Quality of Life ; Risk Factors ; Thyroid Gland* ; Thyroid Neoplasms ; Ultrasonography

No abstract available.