The coronal sectional image of computerized tomography creates an image that is similar to an excretory urogram. It also provides more clearly delineated renal image and image of adjacent organs than an excretory urogram. Further more, the number, extent, and content of renal mats lesions used to discriminate density difference can be determined with relatively great accuracy. This image of computerized tomography is useful to understand and make a diagnosis of renal disease. Coronal sectional image of computerized tomography is more informative in evaluation of retroperitoneum space than conventional radiography. Recently we observed several cases of renal disease-renal cell ca, simple renal cyst, angiomyolipoma, retroperitoneal teratoma, pheochromocytoma, hydronephrosis which could be detected with coronal sectional image of computerized tomography.
Angiomyolipoma ; Diagnosis ; Hydronephrosis ; Pheochromocytoma ; Radiography ; Teratoma

The lung and stomach are very unusual sites for teratoma. The histologic findings of intrapulmonary and gastric teratomas are not different from those arising in usual sites, such as the ovary or testis. However, preoperative diagnosis is sometimes difficult to make partly because of unusual location. We report here two cases of teratoma, one intrapulmonary teratoma and the other gastric. The intrapulmonary teratoma in our study had an endobronchial tumor growth, which rules out mediastinal teratoma. Meanwhile gastric teratomas usually present as a submucosal tumor and most cases are reported in infancy and childhood. Gastric teratoma in this study occurred in a 27-year-old man. To the best of our knowledge, this case of intrapulmonary teratoma is the eighth and the gastric teratoma is the first to be reported in Korea.
Adult ; Case Report ; Gastrectomy ; Human ; Lung Neoplasms/surgery ; Lung Neoplasms/radiography ; Lung Neoplasms/pathology* ; Male ; Middle Age ; Stomach Neoplasms/surgery ; Stomach Neoplasms/radiography ; Stomach Neoplasms/pathology* ; Teratoma/surgery ; Teratoma/radiography ; Teratoma/pathology* ; Tomography, X-Ray Computed

Gastric teratomas are extremely rare neoplasms and almost exclusively benign. They occur predominantly in males and generally present as a palpable abdominal mass. To our knowledge, only one adult case has been described in the Korean literature. We report a case in which an immature gastric teratoma in a 3-month-old boy was revealed by CT and US.
Case Report ; Human ; Infant ; Male ; Stomach Neoplasms/*epidemiology/radiography/ultrasonography ; Teratoma/*epidemiology/radiography/ultrasonography ; Tomography, X-Ray Computed

Malignant transformation of teratoma in the anterior mediastinum is rare; the mass usually has a long history and is seen in older patients. We report a case of teratoma with malignant transformation in the anterior mediastinum, complicated by rupture. CT revealed a lobulated, inhomogeneous cystic mass with a fat com-ponent and wall calcifications. The lateral wall was disrupted and consolidation in the adjacent left upper lobe was noted, suggesting rupture. A heterogeneously enhanced solid portion, obliterating the fat plane between the mass and the great vessels was present in the medial aspect of the mass, and pathologic examina-tion demonstrated the presence of adenocarcinoma.
Adenocarcinoma/pathology ; Human ; Male ; Mediastinal Neoplasms/pathology/*radiography ; Mediastinum/pathology ; Middle Age ; Rupture, Spontaneous ; Teratoma/pathology/*radiography

Pleuropulmonary blastoma (PPB) is a rare malignant dysontogenetic neoplasm primarily affecting children and is characterized histologically by a variably mixed blastematous and sarcomatous patterns. We herein report a very exceptional adult case of PPB. A 21-yr-old male patient presented with a left chest pain of two weeks' duration. A computed tomography scan revealed a large, multicystic tumor occupying the left lower hemithorax, leading to the impression of a ruptured mediastinal cystic teratoma. A thoracotomy for resection of the tumor was performed. On histologic examination, the tumor consisted of cystic walls and associated solid lesions which showed undifferentiated blastemal tissues with focal fibrosarcomatous and rhabdoid features. Immunohistochemically the tumor cells only showed diffuse strong positivity for vimentin. The histologic findings corresponded to a type II PPB. The authors suggest that PPB, especially of type I or II, should be included in the radiologic differential diagnosis of mediastinal cystic neoplasms in a young adult.
Adult ; Diagnosis, Differential ; Human ; Immunohistochemistry ; Lung Neoplasms/*diagnosis/radiography/surgery ; Male ; Pulmonary Blastoma/*diagnosis/radiography/surgery ; Teratoma/*diagnosis/*radiography/surgery ; Tomography, X-Ray Computed ; Vimentin/biosynthesis

A extragonadal malignant teratoma of the extremity is a rare pheonemenon. We describe a extremely rare case of malignant teratoma of the left proximal humerus in a 14-yr-old female. Radiologic evaluations, including magnetic resonance imaging, suggested a malignant bone tumor, but a pathological examination revealed an immature bony teratoma. Bone scintigraphy and positron emission tomography computed tomography scan showed increased uptake of proximal humerus but no other abnormal lesion.
Adolescent ; Bone Neoplasms/*diagnosis/pathology/radiography ; Female ; Humans ; *Humerus/radiography ; Magnetic Resonance Imaging ; Positron-Emission Tomography ; Teratoma/*diagnosis/pathology/radiography ; Tomography, X-Ray Computed

PURPOSE: We performed this study to evaluate the incidence of thoracic inlet pathologies. We also evaluated the extension of the thoracic inlet lesions to neck and/or mediastinum to determine anatomic connections between neck and mediastinum. MATERIALS AND METHODS: we evaluated chest radiographs and CT scans of the 41 patients with various pathologies involving this region. RESULTS: Thyroid lesions and malignant lymphomas were the most common pathologic lesions in this region (54%). Thoracic inlet lesions extending from mediastinum included various pathologies including thymic lesion (n=8) in the anterior mediastinum, neurogenic tumor(n=2) in the posterior mediastinum and malignant lymphoma(n=5) in the multiple compartment. Thoracic inlet lesions extending from the neck(n=9) were mostly thyroid lesions(n=8) arising in the visceral space of the neck. Thoracic inlet lesions(n=11) involving both neck and mediastinum were thyroid lesions, abscesses, thymic lesion, malignant lymphomas and cavernous hemangiomas. Thyroid lesions and cavernous hemangiomas showed remarkable enhancement on post contrast enhanced CT. Teratoma contained fat density and Two cases of abscesses contained air density. CONCLUSION: Thyroid lesions and malignant lymphomas were the most common pathologies in the thoracic inlet. There was anatomic connection between neck and mediastinum through the thoracic inlet. CT was valuale in evaluation of the location, extension, and density of the mass for the differential diaguonis of the thoracic inlet lesions.
Abscess ; Bays* ; Hemangioma, Cavernous ; Humans ; Incidence ; Lymphoma ; Mediastinum ; Neck ; Pathology ; Radiography, Thoracic ; Teratoma ; Thyroid Gland ; Tomography, X-Ray Computed

A malignant transformation or a tumor rupture is a rare complication of ovarian mature cystic teratoma (MCT). A tumor rupture in a malignant-transformed MCT has never been reported in the literature. We present the CT images of a 39-year-old woman showing a large, predominantly cystic mass in the lower abdomen, with fat-fluid-level ascites. A contrast-enhanced solid component, with regional discontinuity within the cystic lesion, is also demonstrated. The pathologic diagnosis of the ruptured MCT unveils the malignant transformation (squamous cell carcinoma) and mesenteric carcinomatosis.
Adult ; Cell Transformation, Neoplastic/pathology ; Diagnosis, Differential ; Female ; Humans ; Ovarian Neoplasms/*pathology/*radiography/surgery ; Teratoma/*pathology/*radiography/surgery ; *Tomography, X-Ray Computed

A rare case of intraventricular germinoma in the third ventricle, which occurred 30 months after total removal of mature teratoma on the same location in a 29- yr-old man is presented. Recurrence is supposed to represent an acceleration of localized dysplastic processes of totipotent germ cells present in the midline neuraxis or a growth of unidentified microscopic residue of germinoma component in mature teratoma. Although the radiation therapy after total removal of mature teratoma is still controversial, careful follow-up is warranted for evaluating a possible recurrence of other germ cell tumors.
Adult ; Cerebral Ventricle Neoplasms/classification/pathology/*radiography/surgery ; Germinoma/classification/pathology/*radiography/surgery ; Humans ; Magnetic Resonance Imaging ; Male ; Neoplasms, Second Primary/classification/pathology/*radiography/surgery ; Teratoma/complications/*surgery ; Tomography, X-Ray Computed ; Ventriculoperitoneal Shunt

PURPOSE: The purpose of this study was to describe the MR findings of the spectrum of the Currarino triad and to discuss the potential role of MR imaging in evaluating these anomalies. MATERIALS AND METHODS: Seven children (age range: 2-12 months) with Currarino triad were evaluated using MR imaging, plain radiography, and barium study. In addition, CT scans (n=3) and sonography (n=2) were performed. We retrospectively analyzed MR imaging findings and correlated these with the findings of other imaging modalities. RESULTS: Anorectal anomalies included anorectal stenosis in five patients and an imperforate anus in two. MR imaging findings of anorectal stenosis included an elongated thick-walled anorectal canal and dilatation of the proximal segment of the rectum. In the patients with an imperforate anus, the location of the blind rectal pouch and sphincteric musculature was delineated. In one case, a transcolostomy enema revealed a fistula not evident on MR images. Presacral masses included four teratomas and three lipomas associated with various spinal anomalies. On MR imaging, which gave better results than CT or sonography, a detailed evaluation of presacral masses and associated anomalies was possible. Sacral anomalies included a typical scimitar-shaped sacral defect in five patients, abnormal curvature in one, and malsegmentation in one. In all cases, MR imaging showed the abnormal sacrum, but plain radiography more clearly demonstrated its anomalous shape. CONCLUSION: Various anorectal anomalies, presacral masses, and other associated anomalies were demonstrated by MR imaging. When the Currarino triad is suspected, MR imaging should therefore follow plain radiographs.
Anal Canal ; Anus, Imperforate ; Barium ; Child ; Constriction, Pathologic ; Dilatation ; Enema ; Fistula ; Humans ; Lipoma ; Magnetic Resonance Imaging* ; Radiography ; Rectum ; Retrospective Studies ; Sacrum ; Teratoma ; Tomography, X-Ray Computed