Biomedical subjects

S J Shin

Publications and source records attributed to S J Shin.

150 records · Page 9Linked to original sources

PubMedDate not supplied

Fluid-fluid levels in ovarian teratomas.

BACKGROUND: We evaluated the imaging features of ovarian teratomas containing fluid-fluid levels on ultrasonography (US). METHODS: We retrospectively reviewed US examinations of two groups with 805 masses (370 benign ovarian teratomas and 435 nonteratomatous adnexal masses). RESULTS: In 27 teratomas and eight nonteratomatous adnexal masses, fluid-fluid levels were detected on US. According to the echogenicity of each layer, 27 teratomas were classified as three types: 1, supernatant hypoechoic and dependent hyperechoic layers (n = 16); 2, supernatant hyperechoic and dependent hypoechoic layers (n = 8); and 3, supernatant hypoechoic and dependent hypoechoic layers with bright fluid interface (n = 3). In eight (30%) of 27 teratomas, US showed floating nodules at the interface, five of which had posterior acoustic shadowing. All eight nonteratomatous adnexal masses showed type 1 fluid-fluid levels. CONCLUSION: The fluid-fluid level seen on US is strongly suggestive but not pathognomonic of dermoids. Fluid-fluid levels with supernatant hyperechoic and dependent hypoechoic layers, supernatant hypoechoic and dependent hypoechoic layers with bright interface, and a floating nodule might pathognomonic findings of benign ovarian teratomas.

Adult↗

PubMedDate not supplied

Vascular complications in lumbar spinal surgery: percutaneous endovascular treatment.

Four patients underwent endovascular treatment of vascular injuries complicating lumbar spinal surgery. In two patients with massive retroperitoneal hemorrhage, the extravasating lumbar arteries were successfully embolized with microcoils. Two patients with large iliac arteriovenous fistula (AVF) were treated, one with embolization using a detachable balloon and coils, which failed, and the other with placement of a stent graft after embolization of distal runoff vessels, which occluded the fistula. We conclude that acute arterial laceration or delayed AVF complicating lumbar spinal surgery can be managed effectively with selective embolization or stent-graft placement, respectively.

Adult↗

PubMedDate not supplied

Radiographic knee dimensions in discoid lateral meniscus: comparison with normal control.

We reviewed the knee radiographs of 68 cases of arthroscopically proven discoid lateral meniscus, including 42 cases of complete type and 26 cases of incomplete type discoid lateral meniscus. Knee radiographs of 70 cases that had no arthroscopic evidence of pathology of the meniscus were used as controls. We excluded patients who had significant trauma history and who were under 16 years of age or over 60 years to avoid measuring radiographs of skeletally immature or degenerative knees. The absolute values and relative normalized values of specific knee dimensions, such as a squared-off appearance of the lateral femoral condyle, widened femorotibial joint space, cupping of the lateral tibial plateau, obliquity of the lateral tibial plateau articular surface, high fibular head, and hypoplasia of the lateral intercondylar spine, were compared between the patients with discoid lateral meniscus and the normal controls. Among those dimensions, high fibular head and widened lateral tibiofemoral joint space showed statistically significant differences between the discoid lateral meniscus group and normal control group. We suggest that these findings would be useful in screening lateral discoid meniscus on plain radiography.

Adolescent↗

PubMedDate not supplied

Thyroid metastasis from intraductal papillary-mucinous carcinoma of the pancreas. A case report.

BACKGROUND: Intraductal papillary-mucinous carcinoma (IPMC) of the pancreas is a newly identified clinicopathologic entity of the exocrine pancreas. It has been considered a slowly growing and less-aggressive carcinoma with a favorable prognosis. There have been only a few documents reporting its distant metastasis and cytologic features, with no report of thyroid metastasis until the present. CASE: A case of IPMC occurred in a 45-year-old male, who was admitted with rapid growth and tenderness of the thyroid. Abdominal computed tomography showed the typical cystic dilatation of IPMC with adjacent organ metastasis. Fine needle aspiration of the thyroid yielded papillary fronds of carcinoma cells with nuclear pleomorphism, abundant cytoplasm and prominent nucleoli in a mucinous background. Immunohistochemical findings from the skin and thyroid characterized the papillary-mucinous carcinoma as having originated in the pancreas. CONCLUSION: This case suggests that papillary carcinoma fronds aspirated from the thyroid should be further differentiated from the primary site and that a pleomorphic nucleus in a mucinous background is a useful feature to exclude a thyroid origin. Before this, distant metastasis of IPMC to the skin and thyroid has not been reported. The prognosis of IPMC with wide, distant metastasis at an advanced stage is poor.

Adenocarcinoma, Mucinous↗

PubMedDate not supplied

Celiac axis stenosis: incidence and etiologies in asymptomatic individuals.

OBJECTIVE: To determine the incidence and etiologies of celiac axis stenosis in asymptomatic individuals. MATERIALS AND METHODS: This prospective study involved 400 consecutive patients (male: 319, female: 81) referred to us for celiac arteriography between April and July 1999. When celiac axis branches were opacified by collateral circulation during superior mesenteric arteriography, the presence of celiac axis stenosis was suspected; lateral projection celiac arteriography was performed and the pressure gradient was measured. The indicators used to determine whether or not celiac axis stenosis was significant were luminal narrowing of more than 50% and a resultant pressure gradient of at least 10 mmHg. Its etiology was determined on the basis of angiographic appearances and CT findings. RESULTS: Twenty-nine patients (7.3%) had celiac axis stenosis. The etiology of the condition was extrinsic compression due to the median arcuate ligament in 16 patients (55%) and atherosclerosis in three (10%), while in ten (35%) it was not determined. The incidence of celiac axis stenosis did not vary significantly according to sex, age and the presence of calcified aortic plaque representing atherosclerosis. CONCLUSION: The incidence of hemodynamically significant celiac axis stenosis in this asymptomatic Korean population was 7.3% and the most important etiology was extrinsic compression by the median arcuate ligament of the diaphragm. Atherosclerosis was only a minor cause of the condition.

Angiography↗

PubMedDate not supplied

Anterior pituitary functions in patients with uremia tested by stimulation with four combined hypothalamic releasing hormones.

Seven cases with uremia (6 men, 1 woman, mean age = 55.6 +/- 2.2 years) were studied with four combined hypothalamic releasing hormones (corticotropin-releasing hormone, CRH; luteinizing hormone-releasing hormone, LHRH; thyrotropin-releasing hormone, TRH; and growth hormone-releasing hormone, GHRH) for assessment of anterior pituitary functions. The mean basal levels of corticotropin (ACTH, 22.4 +/- 5.2 pg/ml), thyrotropin (TSH, 2.4 +/- 0.6 microU/ml), and follicle stimulating hormone (FSH, 26.0 +/- 3.4 mIU/ml) in uremic patients were not significantly different from those (34.0 +/- 3.5 pg/ml, 2.0 +/- 0.4 microU/ml, and 23.2 +/- 6.4 mIU/ml) of controls (5 men, 1 woman, mean age = 54 +/- 2.5 years), but the ACTH and TSH responses to the releasing hormones were significantly lower than those of the controls. The mean basal levels of luteinizing hormone (LH, 70.7 +/- 16.3 mIU/ml), cortisol (9.8 +/- 1.2 micrograms/dl) and prolactin (109.3 +/- 23.2 ng/ml) in uremic patients were significantly higher than those of normals (27.3 +/- 6.6 mIU/ml, 6.5 +/- 0.7 micrograms/dl and 15.7 +/- 3.4 ng/ml), while suppressed LH, cortisol and prolactin responses to the releasing hormones were observed in the uremic group. The mean basal growth hormone (GH) level in uremic patients (3.1 +/- 0.4 ng/ml) was not significantly different from that (2.8 +/- 0.7 ng/ml) of normals, but the GH response to the releasing hormones was significantly higher than that of controls. These results show pituitary dysfunction, such as blunted ACTH, TSH, LH and prolactin response, exists in uremic patients.(ABSTRACT TRUNCATED AT 250 WORDS)

Adrenocorticotropic Hormone↗