CT and MR Findings of Presacral Epidermoid Cyst: A Case Report

Epidermoid cyst of the presacral space is a rare benign congenital lesion which is lined with keratinized squamous epithelium. We describe the computed tomography(CT) and magnetic resonance (MR) imaging findings in a case of presacral epidermoid cyst in a 35-year-old woman. The lesion appeared on CT as a well defined cystic mass with a thin wall. MR imaging showed heterogeneously low signal intensity on T1-weighted images and heterogeneously high signal intensity on T2-weighted images.

Contrast Enhancement Characteristics of Hepatocellular Carcinoma According to the Tomor Size on Two-Phase Scan with Spiral CT

PURPOSE: To determine the enhancing patterns of hepatocellular carcinoma(HCC) and the difference of enhancing patterns according to the tumor size, using spiral CT. MATERIALS & METHODS: We reviewed 213 lesions in 76patients who had been clinically or histopathologically diagnosed as HCC sufferer. The tumors were divided into three groups, according to size(&3 cm, 3-5cm and >5 cm). The enhancing patterns of tumor and capsule in the earlyand delayed phase were analysed. The enhancing patterns of the tumor were divided into five types(high, peripheralhigh, mixed, iso and low attenuation) in the early phase and four types(central high, mixed, iso, and low attenuation) in the delayed phase. The enhancing patterns of the capsule were divided into three types such asiso, low and high attenuation. RESULTS: High attenuating lesions in the early phase were as follows : below 3cm 72% ; 3-5cm., 60% ; above 5cm., 49%. Mixed attenuating lesions in the early phase were as follows : below 3cm., 1%; 3-5cm., 22% ; above 5cm., 36%. Thus, most HCCs were high attenuation type in the early phase, but as the tumorbecame larger, less high attenuation and more mixed attenuation was demonstrated(p<0.01). There was no difference of enhancing patterns according to the tumor size in peripheral high, iso and low-attenuating lesions. In the delayed phase most of the hepatomas appeared as totally hypodense lesions. For capsules, the results were as follows : below 3cm., 20% ; 3-5cm.,58% ; above 5cm., 73%. As the tumors became larger, more capsules were demonstrated(p <0.01). The capsules were visualized as iso or low attenuating rim in the early phase and high attenuating rim in the delayed phase. CONCLUSIONS: To determine the enhancing patterns of HCC using spiral CT is considered to be helpful in the diagnosis of HCC.

Radiologic evaluation of blunt traumatic rupture of the diaphragm

No abstract available.

Evaluation of sonographic and radiographic findings of pelvic masses

Ultrasonographic and radiographic findings in 72 cases of pelvic masses which have been provedhistopathologically were analyzed. The results were as follows; 1. Among 72 cases, 28 cases were uterine massesand 44 cases were adnexal masses. 2. Pathologic accuracies of ultrasonographic diagnosis were 64.3% in uterinemasses, 70.5% in adnexal masses, and 68.1% in all pelvic masses. 3. Plain or IVP findings were not specific indiagnosis and showed secondary mass effects or functional disturbances. 4. Because of its high accuracy ofpathologic diagnosis and safety, ultrasonography can be regared as the most valuable and preferential study. Butin cases of cystic myomas, endometrioses, cystic missed abortions and huge masses, the accurate diagnoses weredifficult.

Radiological study on the primary tuberculous lesions

The simple chest X-ray study is essential in diagnosis of pulmonary tuberculosis, especially primary pulmonarytuberculosis. Authers analyzed the chest films and tuberculin tests of 521 cases which are suspected primarypulmonary tuberculosis coinically, from Jan. 1978 to Nov. 1982 at Seoul Red Cross Hospital. The results are asfollows; 1. Among the total 521 cases, the 115 cases of chst film reveal 245 probable pulmonary tuberculouslesions. 2. The coincidence of the parenchymal and lymphnodal involvement are observed in 40 cases (34.8%) with137 lesions(55.9%), parenchymal only in 23 cases (20.0%) with 25 lesions(10.2%) and lymphnodal only in 52 cases(45.2%) with 83 lesions(33.9%). 3. In observing the distribution of the 83 parenchymal lesions, the right lung istwo times as common as that of the left, being the highest in the RLL field with 41 lesions(49.4%), the lowest inthe LLL field with 3 lesions(3.6%). 4. In observing the distribution of the 162 lymphnodal lesions, there are 95lesions(58.6%) in the right and 67 lesions(41.4%) in the left, involving hilar nodes with 150 lesions(92.6%) andmediastinal nodes with 12 lesions(7.4%). The incidence of unilateral involvement is 13 cases (11.3%) and bilateral79 cases (68.7%). 5. Among the total 245 lesions, 141 lesions(57.9%) are smaller than rice in size, 120lesions(49.0%) are amophous in shape and 186 lesions(75.9%) are mainly calcific in density. According to theincrease of age, count and detection rate of the lesion on the chest film are increased. 6. Tuberculin testsshowed 26.1% negative rate in 115 tuberculous cases, and 51% positive rate in 406 negative chest cases.