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Biomedical subjects

R Ryu

Publications and source records attributed to R Ryu.

15 recordsLinked to original sources
PubMed1998

Percutaneous mesenteric venous thrombectomy and thrombolysis: successful treatment followed by liver transplantation.

Mesenteric vein thrombosis (MVT) is a rare cause of intestinal ischemia. Because of its nonspecific symptoms, diagnosis is often delayed. We describe a patient with liver cirrhosis who developed acute MVT while waiting for liver transplantation. Surgical intervention carried a high risk because of her underlying cirrhosis. Mesenteric venous thrombectomy and thrombolysis were performed with an AngioJet (Possis Medical, Minneapolis, MN) thrombectomy device and streptokinase infusion through transjugular route. The patient subsequently received an orthotopic liver transplant. We also present a review of the literature about the occurrence and treatment options for MVT.

Aged↗
PubMed1997

Chest radiographic findings in patients with tuberculosis with recent or remote infection.

To determine if chest radiographic findings differ in adult tuberculosis patients with recent and remote infection, we reviewed the chest radiographs of 103 patients with tuberculosis in Los Angeles and performed RFLP analyses of their Mycobacterium tuberculosis isolates. Patients whose isolates had identical or closely related RFLP patterns were considered a "cluster." Most patients in large clusters (more than seven patients) had tuberculosis from recent infection, whereas most unclustered patients had tuberculosis from remote infection. Mediastinal adenopathy or pleural effusions were classified as typical of recent infection, and upper lobe infiltrates, cavitation, or fibrosis were classified as characteristic of remote infection. Radiographic patterns were typical of remote infection in 62% of patients and were characteristic of recent infection in 23% of patients. The distribution of these radiographic patterns was similar in clustered and unclustered patients, both with or without human immunodeficiency virus (HIV) coinfection. However, mediastinal adenopathy and pleural effusions were significantly more common in HIV-infected patients. We conclude that: (1) chest radiographic findings in adults with tuberculosis of recent infection are similar to those in patients with remote infection; (2) the distinctive chest radiographic findings in HIV-infected patients with tuberculosis are not due to an increased frequency of recent infection.

AIDS-Related Opportunistic Infections↗
PubMed1990

Meniscal pathology. The expanding role of magnetic resonance imaging.

Magnetic resonance imaging (MRI) is a recently developed diagnostic medical imaging technology that shows great promise in the evaluation of knee meniscal diseases. Fifty-seven patient knees were evaluated by a single experienced MRI interpreter; the findings were compared with arthroscopic findings by a single experienced knee arthroscopist. The overall sensitivity and specificity rates of MRI for tears in virgin menisci compared to arthroscopy were both 92%. These results support reports in the literature that MRI is an accurate noninvasive technique for evaluating meniscal tears. Seven patients were treated with arthroscopic meniscal repair and were evaluated by MRI before and after surgery. Despite an asymptomatic postoperative status in six patients, abnormal intrameniscal signal persisted in four. An unstable meniscal fragment was visualized in the patient with postoperative pain. MRI is also useful in evaluating meniscal degeneration, meniscal ossicles, parameniscal cysts, and abnormal meniscal morphology. MRI is the noninvasive diagnostic technique of choice in evaluating a spectrum of knee meniscal diseases.

Adolescent↗
PubMed1989

Bone abnormalities of the knee: prevalence and significance at MR imaging.

Focal abnormal signal intensity within the distal femoral condyles or proximal tibial plateaus is frequently seen on T1- or intermediate-weighted magnetic resonance (MR) images of the knee. To characterize the prevalence and significance of these findings better, a retrospective study of MR imaging of the knee, performed on the first 434 consecutive patients at a primarily outpatient community MR imaging center, was undertaken. A signal intensity loss demonstrated on images with a short echo time (20 or 25 msec) was divided into three types based on morphologic criteria. A type 1 finding was a diffuse, often reticulated signal intensity loss in the metaphyseal and epiphyseal regions of bone. A type 2 loss was associated with an interruption in the smooth, black cortical line. A type 3 finding was a profound signal intensity loss primarily restricted to the immediate subcortical region. Seventeen percent of all cases revealed a type 1 or 2 loss that may have been compatible with acute bone injuries. These bone lesions were frequently associated with tears of the anterior cruciate ligament and contralateral collateral ligament, but infrequently these lesions were detected with plain radiography and arthroscopy. When associated with a weight-bearing cortex, bone injuries detected with MR imaging may explain clinical symptoms of pain on weight bearing, and type 1 injuries may represent regions of bone at increased risk for the subsequent development of insufficiency fractures if the bone is not adequately protected during trabecular healing.

Adolescent↗
PubMed1971

[Hemophilia].

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Adrenal Cortex Hormones↗