• The Journal of Korean Orthopaedic Ultrasound Society
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• v.7 no.1
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• pp.45-48
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• 2014

Ganglionic cyst is the most common benign tumor in the wrist and hand, and easily diagnosed with ultrasonography. Ganglionic cyst in sonography usually appears as hypoechoic or anechoic with well-demarcated cystic mass. We report a case of the hyperechoic mass at the volar aspect of the wrist, which confirmed as ganglionic cyst by operative and histological findings.

• The Journal of the Korean bone and joint tumor society
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• v.15 no.2
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• pp.151-154
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• 2009

Bronchogenic cyst is rare lesion that arises from maldevelopment of the primitive foregut, and is usually found in the lung and mediastinum. Cutaneous or subcutaneous bronchogenic cyst is rare and occur unusually in the shoulder region. We report here a case of 20-month-old boy with a bronchogenic cyst on his left shoulder region. He underwent incisional biopsy and curettage for a tender cystic mass at a department of dermatology, diagnosed as a epidermal inculsion cyst. But, additional cystic mass was palpated during wound care. MRI showed a well-defined subcutaneous cystic mass. The excised cyst was lined with pseudostratified ciliated columnar epithelium with occasional goblet cells and diagnosed as a bronchogenic cyst.

• Tuberculosis and Respiratory Diseases
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• v.47 no.2
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• pp.265-271
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• 1999

Patients with mediastinal teratoma are usually asymptomatic, but may develop symptoms by rupture into adjacent structures which result in pneumonia, hemoptysis, pleural effusion, pericardial effusion, or pneumothorax. Rarely, life-threatening acute respiratory distress require a emergency surgery. Rupture into pleural cavity may result in pleuritis and pleural effusion with severe anterior chest or back pain. The symptom must be differentiated from other common intrathoracic distress diseases. Clinical, cytologic and radiologic examinations of pleural effusion, and moreover, measurement of enzymes such as amylase or insulin, which is secreted from pancreatic tissues, in pleural effusion and cystic fluid enabled us to make the diagnosis of rupture of mediastinal teratoma preoperatively.

• Journal of Yeungnam Medical Science
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• v.10 no.2
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• pp.417-422
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• 1993

Diagnosis of malignant germ cell tumors of the ovary is usually difficult because many ovarian neoplasms have similar clinical and radiologic manifestations. We reviewed retrospectively 12 cases of ovarian malignant germ cell tumor and evaluated with respect to size, mass characteristics on computed tomography for differential diagnosis. Endodermal sinus tumors were mainly cystic mass with some solid component and septations. Immature teratomas showed typical manifestations, such as fatty tissue, calcifications, cysts, and irregular shaped soft tissue densities. Dysgerminoma was mainly solid mass without cystic component, and mixed germ cell tumor showed nonspecific manifestations. All cases were relatively large in size, and young in age. In conclusion, CT findings of malignant germ cell tumors are helpful in differential disgnosis.

• The Korean Journal of Nuclear Medicine
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• v.28 no.2
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• pp.214-219
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• 1994

The purpose of this study is to evaluate thallium scanning as a potential test in differentiating malignant from benign lesions of breast. Thirty-one female patients underwent thallium scan of the breast. After intravenous injection of 74-111 MBq(2-3 mCi)of thallium-201, anterior and lateral images were obtained. We compared thallium scans with pathological results. Of 11 patients with breat cancers, 10 cases(90.9%) were detected using thallium scan. Thallium scan obtained in one patient who had breast cancer but received several cycles of chemotherapy did not show thallium uptake. The smallest detectable cancer was 1.5cm in diameter. In contrast, there is no thallium accumulation in breasts of 17 of 20 patients with benign disease(85%). Three cases of 13 fibrocystic disease show thallium uptake in their breast. In conclusion, thallium scan is an effective test in differentiating benign from malignant lesion.

• Journal of Veterinary Clinics
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• v.24 no.2
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• pp.251-254
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• 2007

A 10-year-old intact female Yorkshire terrier dog was referred for evaluation of marked abdominal distension and hemorrhagic effusion. Abdominal radiography and ultrasonography demonstrated abdominal effusion and intraabdominal mass with anechoic cystic components. On ascites cytology, neoplastic epithelial cells with vacuolated cytoplasm and prominent nucleoli were identified. Magnetic resonance imaging (MRI) showed the well-defined, heterogeneous, and large mass filled the intraabdominal cavity. At necropsy, a large mass arising from the right ovary was observed. Histopathologically, the mass was composed of papillary structures lined by neoplastic epithelial cells. The dog was definitively diagnosed as malignant ovarian adenocarcinoma with papillary pattern based on clinical and histopathological findings.

• Tuberculosis and Respiratory Diseases
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• v.46 no.5
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• pp.718-722
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• 1999

Thymoma is the most common tumor in the compartment of anterior mediastinum. The malignant thymoma is classified into invasive thymoma(category I) and thymic carcinoma(category II). Recently, well-differentiated thymic carcinoma is a proposed category 1.5 used to describe a subset of thymic epithelial tumors, allowing for the existence of intermediate form based on the clinical features and the histological characteristics. Thymic cyst is a congenital or a acquired disorder. Congenital thymic cyst may develop due to failure of the thymopharyngeal duct to obliterate and acquired thymic cyst develops from inflammation(multilocular thymic cyst), or neoplasm(cystic thymoma). Cystic degeneration in thymoma is a relatively frequent but focal event. In rare cases, the process proceeds to the extent that most or all of the lesion becomes cystic. Until now, well-differentiated thymic carcinoma with extensive cystic degeneration has not been reported in our country. We experienced a case of 14 year-old female patient showing extensive cystic degeneration in well-differentiated thymic carcinoma. And so we report it with review of the articles related.

• Journal of Veterinary Clinics
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• v.31 no.5
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• pp.439-444
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• 2014

A 5-year-old, 2.7 kg female maltese dog was presented a local veterinary clinic with one week history of hindlimb lameness associated with patellar luxation. Reduction of bilateral medial patellar luxation was operated using trochlear resection and lateral reinforcement technique. Three weeks after the surgery, the dog showed bending spine with pain in thoracic and lumbar region, continuous ataxia and intermittent convulsion. Magnetic resonance imaging scanning revealed a hyperintense mass in right frontal lobe of brain and abnormal cavitation from cervical cord to third lumbar cord. Histopathologically, neoplasm in brain composed of meningothelial cells showed loosely reticular or lace-like morphology with numerous extracellular cystic spaces of variable size and shape. Neoplastic cells were positive for vimentin and negative for neuron specific enolase and glial fibrillary acidic protein. Irregular shaped enlarge central canal-like cavity was existed in cervical and lumbar cords. In our best knowledge, this report described the clinical findings, imaging and histopathologic characteristics of unusual intracranial microcystic meningioma with secondary syringomyelia in a dog.

• Journal of the Korean Society of Radiology
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• v.82 no.2
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• pp.481-486
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• 2021

Endosalpingiosis is a condition that causes the non-neoplastic proliferation of ectopic tubal epithelium. Florid cystic endosalpingiosis is an atypical subtype that is very rarely reported. It presents as a mass-like feature and therefore needs to be differentiated from tumorous conditions. Here, we report the imaging findings of a case of multicentric florid cystic endosalpingiosis in the extraperitoneal pelvic cavity and the retroperitoneal spaces.

• Investigative Magnetic Resonance Imaging
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• v.11 no.2
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• pp.127-132
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• 2007

Sinonasal neuroendocrine carcinoma is a rare disease, and reports focusing on the MR imaging findings of sinonasal neuroendocrine carcinoma are extremely rare. Threrefore we intend to report 2 cases of histologically confirmed neuroendocrine carcinoma. A 62-year-old man and a 74-year-old man are both presented with nasal bleeding. Computed tomography(CT) images of the 2 patients showed large, ill-defined masses in sinonasal cavities with adjacent bony destructions. MR images showed masses with isosignal intensity on Tl-weighted images and mixed iso- and high signal intensity on T2-weighted images. Post-contrast MR images showed heterogenous enhancement of masses with necrosis. Adjacent bony destructions were also noted on MR images. In both cases, peritumoral cystic lesions or mucoceles with high signal intensity on T1-weighted images were noted in sphenoid sinus. Both of the CT and MR imaging findings of the 2 patients were nonspecific which are usually seen in malignant tumor. But further study is needed for the significance of the peritumoral cystic areas adjacent the tumors.