Analysis of Sacrococcygeal Morphology in Koreans Using Computed Tomography

BACKGROUND: The sacrococcygeal morphology of Arabs and Europeans has been studied using computed tomography (CT) or magnetic resonance imaging to determine the cause of coccydynia. Studies have suggested differences in sacrococcygeal morphology among ethnic groups. However, there are no data on the sacrococcygeal anatomy of Koreans. METHODS: We conducted a retrospective analysis of 606 pelvic CT scans that were taken at Cheju Halla General Hospital between 2008 and 2014. Fractures of the sacrum or coccyx were excluded. Differences in the sacrococcygeal morphology among age groups stratified by decade of life and between genders were analyzed using sagittal plane pelvic CT scans. The morphological parameters studied were the sacral and coccygeal curved indexes, sacrococcygeal angle, intercoccygeal angle, coccygeal type, coccygeal segmental number, and sacrococcygeal fusion. RESULTS: The average sacral and coccygeal curved indexes were 6.15 and 7.41, respectively. The average sacrococcygeal and intercoccygeal angles were 110° and 49°, respectively. Type II coccyx was most common, and the rate of sacrococcygeal fusion was 34%. There was a moderate positive correlation between age and the sacral curved index (r = 0.493, p = 0.000) and a weak negative correlation between age and the coccyx curved index (r = −0.257, p = 0.000). There was a weak negative correlation between age and the intercoccygeal angle (r = −0.187, p = 0.000). The average intercoccygeal angle in males and females was 53.9° and 44.7°, respectively. CONCLUSIONS: The sacrum tended to be more curved and the coccyx straighter with age. The coccyx was straighter in females than males. Knowledge of the sacrococcygeal anatomy of Koreans will promote better understanding of anatomical differences among ethnicities and future studies on coccydynia.

Application of whole body 18F-FDG PET/CT plus additional delayed pelvic scan after oral hydration ;in the diagnosis of the bladder malignant lesions / 中国癌症杂志

Background and purpose: 18F-FDG has been considered to be of limited value for the detection of bladder lesions because of interference by the 18F-FDG excreted in urine. Delayed pelvic images with“diluted and iflled bladder”use a method of 18F-FDG PET/CT with delayed images after oral hydration so as to increase the detection rate of 18F-lfuorodeoxyglucose(FDG) PET/CT imaging for the lesions of bladder. Methods:48 patients with bladder lesions(35 patients with bladder primary tumor and 13 patients with metastatic tumor) underwent 18F-FDG PET/CT detection and were required oral hydration of 1200-1800 mL water, urination frequently, holding urine when the more scan began. Lesions conifrmed by histopathology, MRI, CT or clinical follow-up at least 1 year. Results:89%(43/48) of patients were obtained good clearance and the urine SUVmax declined from 33.14(9-66.80)to 3.23(1.35-5.65) signiifcantly and the statistical difference was signiifcant (t=8.703, P<0.01). The interval time between two scan was 2 h approximately. At the same time, the SUVmax of bladder lesion was 2.8-25.0. Detection sensitivity, speciifcity and accuracy were 90.47%(19/21), 81.48%(22/27)and 85.41%(41/48), respectively. Conclusion: 18F-FDG activity in the bladder signiifcantly decreased in most patients with“diluted and iflled bladder”. The PET/CT scan can highly detect lesions of bladder tissues. Our method with high accuracy and better endurance could be applied to detect the lesions in bladder.

Hernia hiatal gigante con estómago intratorácico: reporte de un caso y revisión de la literatura / Giant hiatal hernia with intrathoracic stomach: a case report and literature review

Giant hiatal hernia (GHH) with intrathoracic stomach is a rare condition. It is a type 3 or mixed hernia (with sliding and paraesophageal component) with more than 30 percent of the stomach protruding into the chest cavity. These hernias are usually associated with gastric rotation, mostly with organoaxial twist. They have nonspecific clinical manifestations, which include vomiting, and chest or epigastric pain. Complications such as volvulus, perforation, or gastric obstruction constitute a medical emergency. In many cases, these hernias can be detected incidentally on a chest radiograph. Imaging studies, mainly multidetector CT and upper gastro-intestinal series represent vital tools for diagnosis and anatomical characterization of these lesions. The treatment of GHH requires an open or laparoscopic surgical approach. We report the case of a patient evaluated in our department who was diagnosed with giant hiatal hernia with intrathoracic stomach and organoaxial gastric rotation.

La hernia hiatal gigante (HHG) con estómago intratorácico es una enfermedad poco frecuente. Corresponde a una hernia tipo 3 o mixta (componente por deslizamiento y paraesofágico) que contiene más del 30 por ciento del estómago a nivel del tórax. Es común que estas hernias se asocien a rotación gástrica, preferentemente del tipo órgano-axial. Sus manifestaciones clínicas son inespecíficas e incluyen vómitos y dolor torácico o epigástrico. Pueden presentar complicaciones como vólvulo, perforación u obstrucción gástrica, constituyendo una emergencia médica. En muchos casos pueden ser detectadas en forma incidental en una radiografía de tórax. El estudio dirigido con imágenes, particularmente tomografía computada multidetector y estudio baritado esófago-estómago-duodeno, resultan fundamentales para el diagnóstico y caracterización de la anatomía de estas lesiones. El tratamiento es quirúrgico, sea por cirugía abierta o laparoscópica. Presentamos el caso de una paciente evaluada en nuestro servicio, en quien se realizó el diagnóstico de HHG con estómago intratorácico, con rotación gástrica órgano-axial.

The Value of Preoperative Multidetector Computed Tomography for Deep Inferior Epigastric Artery Perforator Free Flap

PURPOSE: Autologous breast reconstruction with abdominal tissue is one of the best options after mastectomy. In a free transverse rectus abdominis myocutaneous(TRAM) or deep inferior epigastric artery perforator (DIEP) flap, a preoperative evaluation of the precise location of perforating vessels and vascular run-off systems is required. The objective of this report is to demonstrate the usefulness of multidetector computed tomography (MDCT) in the preoperative planning of patients undergoing breast reconstruction with abdominal flap. METHODS: From June 2006 to January 2008, 28 patients underwent MDCT evaluation before breast reconstruction. All subjects were females with an age ranged from 30 to 55 years. The CT scan was performed using a 64-slice MDCT scanner(Brilliance 64; Philips Medical Systems, Best, Netherlands). RESULTS: One perforator or two major perforators were marked on image in good relation with a hand-held Doppler examination and intraoperative findings. All vascular run-off systems were cleared before operation. CONCLUSION: Preoperative evaluation of perforator arteries with MDCT angiography is beneficial to the patients undergoing breast reconstruction. This technique provides a noninvasive approach of the vascular anatomy of the entire anterior abdominal wall.

The comparative study of the imaging features of chromophobe cell renal carcinoma with pathologic findings / 中华放射学杂志

Objective To analyze and compare the imaging features of chromophobe cell renal carcinoma(CCRC)with pathologic findings in order to improve the diagnostic accuracy.Methods The data of CT and MRI of 12 patients with CCRC were reviewed retrospectively.Ten patients underwent CT examination,including precontrast scan,the contrast eortieomedullary phase scan and the parenchymal phase scan(one patient without corticomedullary phase scan).Two patients underwent MR examination including precontrast T_1WI,T_2WI and enhanced T_1WI of the corticomedullary phase and the parenchymal phase.Results Four lesions located in left kidney and eight in right kidney.Maximum diameter of lesions ranged from 24 mm to 125 mm,average 56.7 ram.Homogenous density was observed in six lesions of ten on unenhanced CT scan and five lesions had homogenous enhancement on enhanced CT scan,which was due to the less incidence of necrosis,liquefaction and hemorrhage on pathologic findings.Nine Lesions showed hyperdense compared with renal medulla but the density was lower than renal cortex on the corticomedullary phase.The enhanced degree was positively correlated with microvessel density(MVD).All ten lesions became hypodense compared with renal medulla on the parenchymal phase scan.Central stellate scar was found in two big lesions and psudocapsula were observed in four lesions confirmed by pathology.Two patients underwent MRI examination.Compared with medulla,the two lesions showed hyperintense on unenhanced T_1WI and obviously hypointense on unenhaneed T_2WI.The enhancement pattern of them was similar to CT. Conclusion The imaging features of CCRC,such as homogeneity,special enhancement pattern and distinct hypointensity on T_2WI,help to differentiate CCRC from other renal tumors.

Application and observation of sedative drugs on uncooperative children in CT examination / 医疗卫生装备

Objective To observe the effect of sedative drugs applied on uncooperative children in CT examination. Methods 204 samples were divided into groups of baby, infant and preschool children. 20 minutes before CT scan, chloral hydrate and diazepam were taken by those uncooperative children seperately. Drug dosage was calculated according to body weight (kg). Results The effective rate of chloral hydrate were 96.8%(30 cases) in baby group,54.2%(13 cases) in infant group and 53.9%(21eases) in preschool children group, while that of diazepam were 100%(9 cases), 82.6%(19 cases) and 87.2%(68 cases) respectively.Conclusion When approriate sedative drugs were taken by uncooperative children, satisfactory scanning images can be obtained in CT examination