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Metastatic Neuroblastoma in the Brain Parenchyma: A Case Report.

Ho Sung KIM ; Choong Gon CHOI ; Ji Hoon SHIN ; Ho Kyu LEE ; Dae Chul SUH

Journal of the Korean Radiological Society.2000;43(5):635-637. doi:10.3348/jkrs.2000.43.5.635

During childhood, neuroblastoma is a relatively common malignant neoplasm which commonly metastasizes to other organs. Metastasis to the central nervous system from an extracranial neuroblastoma is rare, however, and brain parenchymal metastasis is very rare. We describe a case of brain parenchymal metastasis from primary abdominal neuroblastoma, and review the literature.
Brain Neoplasms ; Brain* ; Central Nervous System ; Neoplasm Metastasis ; Neuroblastoma*

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MR Imaging of Fukuyama Congenital Muscular Dystrophy: A Case Report.

Jeonghyun YOO ; Yookyung KIM ; Haesoo KOO ; Ki Deuk PARK

Journal of the Korean Radiological Society.2000;43(5):629-633. doi:10.3348/jkrs.2000.43.5.629

Fukuyama congenital muscular dystrophy is a genetic disease and common in Japan. The typical clinical features are hypotonia with an early infantile onset and severe developmental delay. The diagnosis is based on pathologic evidence of muscular dystrophy revealed by biopsy or an increased serum creatine kinase levels. Involvement of the brain is characterized by abnormal cerebral cortical dysplasia, cerebellar dysplasia, and white matter changes. We encountered a case of Fukuyama congenital muscular dystrophy in which brain MRI findings were typical, and present this case together with a review of the literature.
Biopsy ; Brain ; Creatine Kinase ; Diagnosis ; Japan ; Magnetic Resonance Imaging* ; Malformations of Cortical Development ; Muscle Hypotonia ; Muscular Dystrophies ; Walker-Warburg Syndrome*

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The Anterior Cruciate Ligament: The Value of Thin-section Proton Density Oblique Sagittal MR Imaging.

Seong Whi CHO ; Young Hoon KIM ; Sang Tae KIM ; Chun Hwan HAN

Journal of the Korean Radiological Society.2000;43(5):623-628. doi:10.3348/jkrs.2000.43.5.623

PURPOSE: To evaluate the usefulness of thin-section proton density oblique sagittal MR imaging in the diagnosis of tear involving the anterior cruciate ligament (ACL). MATERIALS AND METHODS: In 61 arthroscopically confirmed cases (29 patients with ACL injury and 32 normal subjects), thin section proton-density images (TSPDI) were obtained and compared with conventional oblique sagittal PDI and T2-weighted images (T2WI). In TSPD imaging, the scan plane was parallel to the course of the ACL, based on a coronal scanogram; the parameters used were TR/TE 2000 msec/20 -33 msec, 2-mm slice thickness, 16 x16 cm FOV, 256 x192 matrix, two excitations, and no intersection gap. We evaluated the sensitivity and specificity of MR images for diagnosing ACL tear, and their quality, on the basis of whether or not they successfully visualised the anterior/posterior margin of the ACL and linear signal intensities within the ACL fascicles. We also investigated the effects of partial volume averaging between the proximal portion of the ACL and the lateral femoral condyle. RESULT: The sensitivity/specificity of TSPD imaging for diagnosing ACL tear were not significantly different from those of conventional oblique sagittal PDI and T2WI. In the ACL injury group, TSPDI was better in detecting increased signal intensity, ACL thickening, and visualization of torn ACL than conventional oblique sagittal PDI and T2WI. In normal subjects, image quality was constantly better on TSPDI than on conventional oblique sagittal PDI and T2WI. TSPDI clearly revealed the anterior margin in 31/32 cases (97%) and linear signal intensities within the ACL fascicles in all 32 (100%), and also markedly reduced the partial volume effect of the proximal ACL and lateral femoral condyle. CONCLUSION: In evaluating the ACL, the use of TSPD imaging is likely to lead to improved image quality. In addition, where routine MR imaging reveals indeterminate ACL injury, TSPDI can provide additional clues to diagnosis.
Anterior Cruciate Ligament* ; Diagnosis ; Humans ; Magnetic Resonance Imaging* ; Protons* ; Sensitivity and Specificity

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MR Imaging of Sacrococcygeal Pilonidal Sinus.

Sun Mi KIM ; Myung Jin SHIN ; Soo Jung CHOI ; Sung Moon KIM

Journal of the Korean Radiological Society.2000;43(5):615-621. doi:10.3348/jkrs.2000.43.5.615

PURPOSE: The purpose of this study is to evaluate the characteristic MR findings of sacrococcygeal pilonidal sinus. MATERIALS AND METHODS: Eight MR images of pathologically proven sacrococcygeal pilonidal sinus were retrospectively reviewed [M: F = 7: 1; age range 9-41 (median, 17) years]. In all cases, a sacrococcygeal mass was present. Five of the eight patients experienced pain, and in three was discharge. MR findings were evaluated with regard to the location and extent of the lesion, and the presence of sinus or cyst, and the results were compared with the pathologic findings. RESULT: According to the clinical manifestations, each case was assigned to one of four groups: the first type (n= 3) showed dermal thickening with subcutaneous fatty infiltration of the ipsilateral natal cleft while pathologically, a follicular cyst with dermal fibrosis and multiple fatty lobules with fibrous septa were found to be present. In the second type (n = 3), fluid was observed in the sinus tract, while the pathologic findings demonstrated the presence of an abscess in this area. In the third type (n = 1), a cystic lesion with airfluid level was present; pathologically, an abscess was revealed. The fourth type (n = 1) showed only a low signal intensity sinus tract on both T1 and T2-weighted images, while the pathologic findings indicated the presence of hairs and follicles within the tract. CONCLUSION: The MR findings of sacrococcygeal pilonidal sinus depend on the clinical manifestation and include subcutaneous fatty infiltration, a sinus tract with or without fluid retention, and a cystic lesion with air fluid level. These findings could be helpful for differentiating between this and other sacrococcygeal lesions.
Abscess ; Fibrosis ; Follicular Cyst ; Hair ; Humans ; Magnetic Resonance Imaging* ; Pilonidal Sinus* ; Retrospective Studies

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Mesenchymal Chondrosarcoma Arising from the Intrascrotal Extratesticular Soft Tissue: A Case Report.

Jong Uk LIM ; Bong Sik KOO ; Byeong Ho PARK ; Chang Sook PARK ; Kyung Jin NAM ; Heon Young KWEON

Journal of the Korean Radiological Society.2000;43(5):611-613. doi:10.3348/jkrs.2000.43.5.611

Intrascrotal extratesticular malignancies are rare, and the radiologic findings of extraskeletal chondrosarcoma have not been reported. We describe the radiologic findings of a case of mesenchymal chondrosarcoma arising from intrascrotal extratesticular soft tissue and represented by a complex, cystic, solid mass containing calcifications and hematoma.
Chondrosarcoma ; Chondrosarcoma, Mesenchymal* ; Hematoma ; Sarcoma

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Intaureteral Recurrence of Renal Cell Carcinoma Following Nephrectomy: A Case Report.

So Young YOO ; Seung Hyup KIM ; Kyung Ho LEE ; Sung Il HWANG ; Jung Suk SIM

Journal of the Korean Radiological Society.2000;43(5):607-609. doi:10.3348/jkrs.2000.43.5.607

The recurrence of renal cell carcinoma (RCC) in the remnant urothelium is rare, and in this paper we report a case in which the condition recurred in the remnant ureter five years after radical nephrectomy. The recurrent mass was seen on retrograde ureterograms as polypoid filling defect, and on CT images as soft tissue mass-like density. In view of the radiologic and pathologic findings, we believe that in this case, the mechanism of intraureteral recurrence was direct implantation.
Carcinoma, Renal Cell* ; Nephrectomy* ; Recurrence* ; Ureter ; Ureteral Neoplasms ; Urothelium

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Hepatic Infarction in HELLP Syndrome: A Case Report.

Mi Jeong KIM ; Hong KIM

Journal of the Korean Radiological Society.2000;43(5):603-605. doi:10.3348/jkrs.2000.43.5.603

Hepatic infarction is a rare but potentially life-threatening complication of pregnancy-associated preeclampsia or HELLP (hemolysis, elevated liver function tests, low platelets) syndrome. We present a case of hepatic infarction subsequent to HELLP syndrome and occurring during the immediate postpartum, and the associated radiologic findings. Sonography revealed poorly defined hypoechoic zones of infarctioin. Computed tomography(CT) demonstrated the characteristic features of nonenhancing, low attenuation, relatively well-defined, wedge shaped or geographic hepatic lesions, without mass effect.
Female ; HELLP Syndrome* ; Infarction* ; Liver Function Tests ; Postpartum Period ; Pre-Eclampsia ; Pregnancy

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Colitis Cystica Profunda Causing Intussusception: A Case Report.

Su Jeong KIM ; Kang Soo LEE ; Du Seong JEON

Journal of the Korean Radiological Society.2000;43(5):599-602. doi:10.3348/jkrs.2000.43.5.599

Colitis cystica profunda is a benign disorder in which a mucous cyst is located in the submucosal layer of, primarily, the pelvic colon and rectum. Radiologic reports of the condition are rare. We report the radiological findings of a case of colitis cystica profunda arising from the proximal ascending colon near the ileocecal valve, and causing intussusception. We also review the literature.
Colitis* ; Colon ; Colon, Ascending ; Ileocecal Valve ; Intussusception* ; Rectum

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Comparison between Spiral CT and MR Imaging in Evaluation of Focal Hepatic Masses.

Yong Ho CHO ; Heoung Keun KANG ; Yong Yeon JEONG ; Hyeoung Kil KIM ; Man Won YOON ; Gwang Woo JEONG ; Tae Woong CHUNG

Journal of the Korean Radiological Society.2000;43(5):591-598. doi:10.3348/jkrs.2000.43.5.591

PURPOSE: The main aim of this study was to compare spiral CT and MR imaging in the detection and characterization of focal hepatic masses. MATERIALS AND METHODS: Seventy-nine patients with 155 focal hepatic masses confirmed pathologically, or radiologically and clinically [hepatocellular carcinoma(HCC) (n =52), hemangioma (n=36), cysts (n =35), metastasis (n =27), intrahepatic cholangiocarcinoma (n =5)], underwent two- or three-phase spiral CT, and T1-, T2- weighted, and dynamic contrast-enhanced MR imaging. The detection and characterization of focal hepatic masses by these modalities were evaluated and compared. RESULT: The detection rates of spiral CT and MR imaging, respectively, were as follows: HCC, 81%(42/52) and 94%(49/52); hemangioma, 75%(27/36) and 100%(36/36); cysts, 80%(28/35) and 100%(35/35); metastasis, 67%(18/27) and 100%(27/27); and intrahepatic cholangiocarcinoma, 100%(5/5) and 100%(5/5). MR imaging was superior to spiral CT in mass detection of HCC, hemangioma, cysts, and metastasis (p < .05). The characterization rates of spiral CT and MR imaging, respectively, were as follows: HCC, 52%(27/52) and 71%(37/52); hemangioma, 67%(24/36) and 100%(36/36); cysts, 63%(22/35) and 100%(35/35); metastasis, 37%(10/27) and 100%(27/27); and intrahepatic cholangiocarcinoma, 40%(2/5) and 80%(4/5). In the mass characterization of HCC, hemangioma, cysts, and metastasis, MR imaging was superior to spiral CT (p< .05). CONCLUSION: In the detection and characterization of focal hepatic masses, including hepatocellular carcinoma, hemangioma, hepatic cyst and metastasis, MR imaging is superior to spiral CT.
Carcinoma, Hepatocellular ; Cholangiocarcinoma ; Hemangioma ; Humans ; Magnetic Resonance Imaging* ; Neoplasm Metastasis ; Tomography, Spiral Computed*

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The Diagnostic Concordance of Endoanal Ultrasonography and Endoanal MRI in Cases of Anorectal Fistula.

Wan Tae KIM ; Seon Young YOO ; Hee Jung MOON ; Hyun Ja SHIN ; Jae Sik JOO

Journal of the Korean Radiological Society.2000;43(5):585-590. doi:10.3348/jkrs.2000.43.5.585

PURPOSE: To evaluate the preoperative diagnostic concordance of morphologic classification of anorectal fistula by endoanal ultrasonography (EUSG) and endoanal magnetic resonance imaging (EMRI). MATERIALS AND METHODS: Between January 1998 and March 1999, 17 patients with anorectal fistula underwent endoanal ultrasonography and magnetic resonance imaging for preoperative assessment. The types of fistula and abscess formation were evaluated, and the findings compared with those obtained during surgery. RESULT: The overall accordance of anorectal fistula was 76% (13 of 17 cases) on ultrasonography and 94% (16 of 17 cases) on magnetic resonance imaging. According to the findings of EUSG, the accordance of each type of anorectal fistula was as follows: transphineteric, 92% (11 of 12 cases); suprasphinteric, 33% (1 of 3); and extrasphincteric, 50% (1 of 2), while for EMRI, the respective figures were 100% (12 of 12 cases), 67% (2 of 3), and 100% (2 of 2). An analysis of reproducibility using kappa value showed that overall concordance between endoanal ultrasonography and surgery(K=0.820) as well as between endoanal MRI and surgery (K=0.866), was very close. CONCLUSION: For the evaluation of anorectal fistula, preoperative endoanal magnetic resonance imaging was more accurate and informative than endoanal ultrasonography.
Abscess ; Classification ; Fistula* ; Humans ; Magnetic Resonance Imaging* ; Ultrasonography*

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