Primary Ectopic Mediastinal Goiter Combined with Papillary Microcarcinoma of the Cervical Thyroid Gland / 대한내분비외과학회지

True primary mediastinal ectopic goiters are quite rare, and they occur in less than 1% of all goiters. We report here on a case in which a primary mediastinal ectopic goiter was accompanied with papillary microcarcinoma of the cervical thyroid. The mediastinal ectopic goiter was not connected to the cervical thyroid and its blood was supplied from intrathoracic vessels, which necessitated a thoracotomy or sternotomy for removal rather than a standard cervical collar incision. We performed total thyroidectomy for the papillary microcarcinoma of the cervical thyroid gland and transsternal removal for the mediastinal goiter; this resulted in a favorable outcome.

Hemodynamic evaluation of flow to the femur head in patients with systemic lupus erythematosus / 대한내과학회지

BACKGROUND: One of the groups with highest risk for avascular necrosis is patient with systemic lupus erythematosus (SLE). Corticosteroid therapy is also the most important risk factor. No predictive test, however, was known to detect avascular necrosis. The purpose of this study is to evaluate hemodynamic flow to the proximal femur in patients with SLE with long term corticosteroid therapy. METHODS: Twenty-two patients with SLE without avascular necrosis and with long-term corticosteroid treatment (mean months; 41 (1-156)) versus 15 healthy controls were evaluated. Medial and lateral circumflex arteries of 44 hips in 22 SLE patients and 30 hips in healthy controls were examined using ultrasoud equipment with color Doppler and power Doppler capability. Arterial pulstality index (PI) and peak systolic velocity (PSV) were determined with neutral and internal rotation position (stimulated ischemia). RESULTS: PSV was significantly increased in patients with SLE than healthy controls (70.6+/-40.4 vs 46.9+/-19.3; p<0.001) with neutral position as well as (74.8+/-42.3 vs 49.9+/-19.9; p<0.001) with internal rotation. PI was also higher in SLE patients than healthy controls (8.9+/-6.3 vs 5.5+/-3.4; p<0.001) with neutral position as well as (8.1+/-7.1 vs 3.9+/-2.5; p<0.001) with internal rotation. PI strongly correlated with PSV (r=0.99, p<0.001). But PSV or PI did not correlate with duration of corticosteroid use. CONCLUSION: Peak systolic velocity and pulstality index of arteries to the femur head in patients with SLE with long-term corticosteroid treatment were significantly higher than healthy controls. These hemodynamic changes may contribute to develop avascular necrosis of the hip in patients with SLE.

The Accuracy of the Physical Examination, Mammography, and Ultrasonography in the Assessment of Tumor Size and Axillary Lymph Node Metastasis in Breast Cancer Patient / 한국유방암학회지

PURPOSE: With the increasing use of neoadjuvant chemotherapy and minimally invasive therapy, the accuracy of preoperative determination of breast tumor size and axillary lymph node status become more important. The purpose of this study was to correlate physical examination, mammographic, and ultrasonographic measurements of tumor size and regional lymph node status with pathologic findings and to evaluate the accuracy of various preoperative examination methods. METHODS: Ninety patients presenting with palpable primary breast cancer treated with mastectomy or breast conserving surgery with axillary dissection were measured breast tumor size and axillary lymph node status by physical examination, mammography, and high resolution duplex ultrasonography, and correlated with the values obtained at pathologic examinations. RESULTS: The sensitivity of mammography and sonography for breast tumor were 82.5% and 90.8%, respectively. The average diameter of tumors was 3.39+/-1.77 cm on pathologic examination. Physical examination demonstrated the highest correlation coefficient (r=0.759) in measurement of the tumor size. The sensitivity of physical examination mammography, and sonography for axillary node involvement were 37.5%, 57.7%, and 73.9%, respectively, and with specificity of 98.1%, 86.5%, and 92.9%, respectively, and with positive predictive value of 93.8%, 75.0%, and 85.0%, respectively. CONCLUSION: Physical examination is the best non-invasive predictor of the real size of palpable primary breast cancer, whereas high resolution duplex ultrasonography is most sensitive assessment method of axillary lymph node status. The specificity of axillary nodal status can be increased by fine-needle biopsy under sonographic guidance and it can be serve as useful adjuncts to sentinel node biopsy.

A Case of Primary Pericardial Hemagiopericytoma

Intracardiac hemangiopericytomas are rare tumors which originates from the pericyte in the external wall of capillaries. 1) The tumors are known to usually develop in the lower extremities, pelvic cavity and retroperitoneum, 2) but are very rare in the heart. 3) The symptoms and signs of a hemagiopericytoma depend on the size and location of the tumor. 2) A hemagiopericytoma has a high potential for local recurrence and metastasis, so regular follow-up is needed following surgical excision. 2) A 36-year-old man presented with shortness of breath and chest discomfort. Before operating, a chest CT scan showed that a compressive collapse of the left lung had developed next to a large mediastinal tumor. Because of impending respiratory failure due to collapse of the left lung, an operation was performed. The operation showed that the mediastinal tumor was a large loculated hemopericardium accompanied by pericardial bleeding. A hematoma evacuation with a pericardiectomy was performed, and the pathology of the thickened pericardial wall revealed a malignant hemangiopericytoma. The patient has followed up for 6 months without symptoms or sign of tumor recurrence following the radiation therapy.

Comparison of CT Angiography and Digital Subtraction Angiography in the Evaluation of Intracranial Aneurysmal Neck

PURPOSE: To compare the usefulness of three-dimensional multislice CT angiography(CTA) and digital subtraction angiography (DSA) in the evaluation of intracranial aneurysmal neck. MATERIALS AND METHODS: Nineteen patients with intracranial aneurysm (23 cases) underwent DSA and subsequent CTA. Using a multislice CT scanner and the SSD(shaded surface display) technique, clipping, cutting and the MPR technique, three-dimensional images were obtained. These were (a) external, (b) internal, from the direction of the parent artery, (c) internal, from the direction of the aneurysmal dome, and (d) an aneurysmal cutting image. The CTA findings were retrospectively compared with the DSA images. RESULTS: Twenty aneurysms were small and three were large. In eleven cases aneurysm neck was small, in nine it was wide, and in three it was relatively wide. For aneurysnal neck evaluation, CTA was superior to DSA in six of nine wide-neck aneurysms and all three large-sized wide-neck aneurysms. In small neck aneurysms 8 of 11 cases and in relatively wide neck all 3 cases showed similarly good images by both modalities. Of the 23 cases demonstrated by four different images, 14 cases showed the best image in internal image from parent artery direction and 6 cases showed similarly good image in both aneurysmal cutting image and internal image from parent artery direction. In the evaluation of wide neck aneurysms, 7 of 9 cases showed the best image at internal image from parent artery direction, compared with other three different images. In two cases of aneurysms, calcification was visible in the aneurysmal wall, so it was difficult to evaluate the aneurysmal neck. CONCLUSION: CTA was superior to DSA in the evaluating the intracranial aneurysmal neck. CTA maybe an additional available modality to evaluate the aneurysmal neck which is difficult to detect by the DSA. And the information of intracranial aneurysmal neck through CTA will be of value in surgical and endovascular treatment.

Areas of Decreased Parenchymal Attenuation Associated with Bronchiectasis: Correlation between Severity and Extent of Bronchiectasis on HRCT with Pulmonary Function Test

PURPOSE: To determine the correlation between areas of decreased parenchymal attenuation seen in cases of bronchiectasis, and the severity and extent of the condition, as revealed by HRCT and the plmonary function test (PFT). MATERIALS AND METHODS: The findings of forty-five patients with bronchiectasis who had undergone PFT and HRCT were retrospectively analysed. CT scores were calculated according to the severity and extent of the condition, and areas of low attenuation, and the correlation coefficients between these were determined. Bronchiectasis was classified as either cylindrical or cystic, and using Student's t test, the statistical significance of the results of the PFT were determined. RESULT: The severity and extent of bronchiectasis correlated with the extent of areas of low attenuation (r > .45, p .44, p < .01). The functional parameters of the PFT which help differentiate between cylindrical and cystic bronchiectasis are FEV1, FVC, MMEF, DLCO (p < .01), RV, and TLC (p < .05). CONCLUSION: In patients with bronchiectasis, the extent of the condition correlated closely with the extent of low attenuation, and the latter, especially in cases of cylindrical bronchiectasis, showed significant correlation with the extent of abnormalities revealed by the pulmonary function test.

Radiologic Findings of Deep Seated Cere b ral Arteriovenous

PURPOSE: To analyze the radiologic-especially angiographic-findings of deep seated cerebral arteriovenous malformation(AVM) involving nonvisualized straight sinus. MATERIALS AND METHODS: In six patients aged between 15 and 53 years with deep seated cerebral AVM, CT and MR images were retrospectively analyzed with regard to the following features : the presence of straight sinus, the location of AVM, and the occurrence of hemorrhage. Angiograms were analyzed for venous drainage routes of AVM, the appearance of veins, the presence of falcine sinus and venous drainage from normal deep brain parenchyme. In four patients who had undergone intravascular embolization therapy, pre- and post- embolization angiograms were compared. RESULTS: CT and MR images showed neither straight sinus nor thrombosis. AVMs were deeply seated in the brain, and in all cases there was cerebral hemorrhage. Angiograms disclosed that venous drainage of all AVMs occurred via the veins of Galen. In one case, venous flow via the falcine sinus to the superior sagittal sinus was noted, but in others, retrograde flow in the deep venous system was observed. Marked collateral routes followed in response to the obstruction of straight sinus included the basal vein of Rosenthal, the internal occipital, internal cerebral, and cerebellar hemispheric veins (which are Galenic afferents), and the inferior sagittal s-inus. In all patients, contralateral routes were partially involved. Venous drainage from normal deep parenchyme through the transcerebral veins to the superficial venous system was noted, and in one case, s-traight sinus which had been observed on an angiogram five years earlier was no longer present. CONCLUSION: Angiography offers effective evaluation of the dynamic aspect of venous flow in cases involving deep-seated AVM, and of normal deep parenchyme in cases in which AVM involves nonvisualized straight sinus. Before intravascular treatment of AVM, venous flow must be carefully analyzed.

Differentiation of Multiple Myeloma and Metastasis: Emphasis on Bone Marrow Invo l vement Pattern of Spine inSagittal MR Images

PURPOSE: To differentiate multiple myeloma and metastasis of the spine. MATERIALS AND METHODS: Retrospectiveanalysis of MR images of the patients with multifocal spinal involvement of multiple myeloma and metastasis wasdone. Analysis was done in viw points of bone marrow involvement pattern(focal, diffuse, and mixed), margin,number, size and uniformity of the focal lesions, involvement of pedicle and posterior element, and epidural andparavertebral mass formation. RESULTS: Multiple myeloma predominantly showed diffuse pattern (11/21, 52.4%) ofmarrow involvement, while metastasis showed mainly focal pattern (18/21, 85.7%). Margin of the focal lesions weredistinct in majority (8/10, 80%) of multiple myeloma and indistinct in majority (16/21, 76.2%) of metastasis. Sizeof the focal lesions were smaller in cases of multiple myeloma than those of metastasis, but number and standarddeviation of the size of the focal lesions did not show significant difference between the two diseases.Involvement of posterior element were more common in multiple myeloma, and epidural mass formation andparavertebral mass formation were more common in metastasis. CONCLUSION: The diffuse pattern of marrow involvementalone suggests multiple myeloma. When a focal or a mixed pattern is found, distinct margin and smaller focallesions are suggestive of multiple myeloma, and indistinct margin and larger focal lesions andepidural/paravertebral mass formation are suggestive of metastasis.

MR Findings of Sturge-Weber Syndrome : Emphasis on Vascular Abnormality

PURPOSE: To observe MR findings of vascular abnormality in Sturge-Weber syndrome and to determine the value of MRI in diagnosis. MATERIALS AND METHODS: Ten patients with Sturge-Weber syndrome (age : 3 months-32 years)were evaluated by MR imaging ; in six and four cases, respectively, the results were correlated with those of CT and angiography. We retrospectively analysed changes in the cortical vein and deep venous system, including the medullary and subependymal vein, as well as an largement of the choroid plexus, leptomeningeal enhancement, and changes in diploic space. RESULTS: In all cases except one, in which non-contrast enhanced study had been performed, varying degrees of leptomeningeal enhancement were seen. In nine cases the cortical vein became smaller; enlargement of the choroid plexus was seen in eight cases, change in the diploic space in seven (including three in which there was angiomatous involvement), and enlargement of the deep venous system in seven. In younger patients, collateral pathways were less developed and leptomeningeal angiomatous changes were more pronounced than in those who were older. CONCLUSION: MRI is a useful modality for the evaluationn of vascular changes in Sturge-Weber syndrome. These changes vary according to a patient's age and the duration of the disease.

Tuberculous Pneumonia: CT Findings in 20 Patients

PURPOSE: To evaluate CT findings of tuberculous pneumonia mainly presenting as parenchymal consolidation. MATERIALS & METHODS: CT scans of twenty patients with tuberculous pneumonia were retrospectively reviewed. Analyses included the location, extent, and homogeneity of consolidation, presence of volume loss of involved lung and air-bronchogram, associated lesions suggesting previous tuberculous infection and evidence of bronchogenic spread. RESULTS: The location of consolidation revealed relatively even distribution without any specific predilection site. The areas of consolidation were irregular in margin (95%), inhomogeneous in attenuation (75%) including focal areas of low attenuation and multiple cavities within it. Volume loss (70%) of the involved lobe was associated. There were lesions suggesting previous tuberculous infection (95%) in the surrounding area and evidences of bronchogenic spread (100%) such as poorly-defined nodules and Iobular consolidations in the remote site from main consolidation. CONCLUSION: In tuberculous pneumonia, the areas of consolidation are irregular in margin and inhomogeneous in attenuation on CT scan. The evidences of bronchogenic spread and lesions suggesting previous tuberculous infection are almost always associated in the surrounding or remote site from main consolidation.