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Biomedical subjects

K Jonsson

Publications and source records attributed to K Jonsson.

At least 19 recordsLinked to original sources
PubMed1992

CT of the wrist in suspected scaphoid fracture.

Bone scan and sagittal projection CT of the scaphoid was performed in 10 patients with clinically suspected scaphoid fractures. The primary and follow-up plain radiographs were negative or equivocal for fracture. CT examination demonstrated scaphoid fracture in 7 patients and normal findings in 3. It is concluded that CT of the scaphoid can replace bone scan to diagnose or rule out fracture in institutions where nuclear medicine facilities are not available.

Adolescent↗
PubMed1992

Osteochondritis dissecans of the elbow. A long-term follow-up study.

Thirty-one patients with osteochondritis dissecans of the capitellum humeri were followed for an average of 23 years. There were symptoms in about half of the elbows at the follow-up examination. Impaired motion and pain on effort were the most common complaints. Roentgenographic signs of degenerative joint disease were present in more than half of the elbows and correlated with a reduced range of motion. The diameter of the radial head increased in comparison with the contralateral elbow in two thirds of the patients.

Adolescent↗
PubMed1979

Arterial occlusion of pelvic bone tumors.

Arterial occlusion of the internal iliac artery was successful in the relief of pain due to primary and secondary neoplasms of the bony pelvis in 8 of 9 patients. These included 3 giant cell tumors, 1 aneurysmal bone cyst, 1 recurrent chondrosarcoma, 3 metastatic renal cell carcinoma and 1 metastatic clear cell sarcoma. Calcification of the margin of the lesion occurred in 3 of 4 primary neoplasms after infarction. The transcatheter arterial occlusion was accomplished utilizing Gelfoam and stainless steel coils. Although most patients experienced pain and fever for several days following the procedure, no permanent sequelae or complications were encountered.

Adenocarcinoma↗
PubMed1979

How accurate is angiographic staging of renal carcinoma?

Angiographic interpretations were compared with the pathologic findings of 75 patients undergoing nephrectomy for renal carcinoma. Angiography correctly predicted the clinical stage in only 36 per cent of the cases. This failure rate was attributed to the lack of consistent radiologic criteria for determining invasion of the perinephric fat, renal vein, and extension to regional lymph nodes.

Adult↗
PubMed1979

Angiography in leiomyosarcoma of the inferior vena cava--report of two cases.

Two patients with leiomyosarcoma of the suprarenal inferior vena cava are presented. In one case the tumour was misinterpreted as intrahepatic at angiography. In the second case an extrahepatic location was suggested after repeated angiography. The diagnosis should be borne in mind when a large hypovascular mass appears to be located centrally in the liver at coeliac angiography and when ultrasound examination has revealed its solid nature.

Age Factors↗
PubMed1978

Lymphangiography in patients with malignancy in a non-descended testicle.

Lymphangiography was performed on 23 patients with malignancy in non-descended testicles, 14 of whom had seminomatous and 9 non-seminomatous tumors. Lymph node metastases were shown by lymphangiography in 8 patients: 3 in lumbar nodes, 1 in iliac nodes alone and 4 in lumbar and iliac lymph nodes. Microscopic metastases were shown in lumbar nodes at retroperitoneal lymph node dissection in 2 patients when the lymphangiograms were negative. Iliac lymph node metastases are rare in testicular tumors but may be seen in tumors of non-descended testicles, alone or in combination with lumbar metastatic disease. This information is extremely important for the radiologist as well as the clinician in the management of patients.

Adult↗
PubMed1978

Prostaglandin E1 (PGE1) in angiography of tumors of the extremities.

Prostaglandin E1 (PGE1) is a potent vasodilator. The value of this agent as an adjuvant in angiography of tumors of the extremities was evaluated in 10 patients. Except in one case involving a hemangioma, the diagnostic information concerning tumor vascularity and delineation of the extent of disease decreased after the use of PGE1. The visualization of small normal muscular arteries was improved. Therefore, the effect of PGE1 may be to preferentially increase the blood flow in normal tissues relative to the tumor. PGE1 seems to be of little value in enhancing the angiographic demonstration of neoplasms of the extremity.

Adolescent↗
PubMed1978

Angiography of abdominal leiomyosarcoma.

The spectrum of angiographic findings of abdominal leiomyosarcoma in 33 cases is presented, and the value of angiography in the diagnosis and management of such patients is discussed. Angiographic features of abdominal leiomyosarcomas are different depending upon the site of origin. Small bowel lesions are hypervascular, and those in the stomach and colon moderately vascular. Well circumscribed masses with enlarged feeding arteries and draining veins form the predominant presentation of small bowel leiomyosarcoma. In the retroperitoneum these neoplasms are usually hypovascular to moderately vascular, and displacement of major vessels, particularly the inferior vena cava, is the most common angiographic finding. Bladder leiomyosarcoma can be either moderately vascular or hypervascular. Vascularity of metastases is usually similar to that of the primary lesion.

Abdominal Neoplasms↗
PubMed1978

Lymphangiographic changes after radiation therapy.

Lymphangiographic appearance following radiotherapy is described in 21 patients with pre- and posttherapy lymphangiograms. Following radiotherapy to normal lymphatics, decrease in nodal size and lymph vessel caliber is noted uniformly after 12 months. Before 12 months the development of these changes is variable and may not be seen, especially during the first several months. Following irradiation of abnormal lymph nodes, dilatation of the lymph vessels distal to the abnormal nodes may occur. These lymphangiographic findings can be related to histologic changes seen in lymph nodes after radiation therapy.

Adolescent↗
PubMed1977

How is renal carcinoma detected?

The primary symptoms and signs, indicating urography, in 369 patients with renal carcinoma have been reviewed. Gross haematuria was noted in 33%, signs of malignancy in 20% and in 13% metastases were first diagnosed. In 15% the renal tumor was an incidental finding at urography performed because of prostatism, cystopyelitis, hypertension and prostatic carcinoma. It is concluded that every urography must have such a high quality as to be able to evaluate the entire urinary system in all patients, as a renal carcinoma may be found at urography in any patient above the age of 30 years.

Abdomen↗
PubMed1977

Changes in the lymphatic dynamics after retroperitoneal lymph node dissection.

Lymphatic dynamics in the retroperitoneal space are altered after retroperitoneal lymph node dissection. Obstruction with or without visible collaterals is seen frequently. Lymphaticovenous communications and lymphocysts are also common findings. The immediate sequelae are of minor importance, although the mass effect of lymphocysts may be serious. The collateral pathways and lymphaticovenous anastomoses may result in the appearance of metastases in unusual sites.

Adolescent↗
PubMed1977

The angiographic appearance of thymic tumors.

Angiography of the internal mammary artery was performed in 30 patients with suspected tumors in the anterior mediastinum. In 3 patients, thymic venography was also performed. In 13 lymphoepithelial thymomas, a smooth outline with the arteries penetrating the periphery of the tumor was demonstrated. Frequently, neovascularity but never encasement of large arteries or arteriovenous (AV) shunting was exhibited. In the lymphoepithelial thymomas of the cell-rich type, the accumulation of contrast medium and neovascularity were pronounced. This type of thymoma may possibly be locally more invasive than others. In carcinomas, the arteries penetrated the tumor and AV shunting was common. Arteriography was superior to venography in the few patients in whom both examinations were performed. Angiographically, it should be possible to differentiate thymomas from carcinomas.

Adult↗
PubMed1977

Fine needle aspiration biopsy of retroperitoneal lymph nodes and abdominal masses: an updated report.

Percutaneous fine needle aspiration biopsy of retroperitoneal lymph nodes and abdominal masses was performed in 109 patients. Eighty-five per cent of the aspiration biopsies yielded sufficient cytologic material for a correct diagnosis. Indications include confirmation of lymphangiographic findings and the establishment of a histologic diagnosis in lieu of surgery. No significant complications were encountered.

Abdominal Neoplasms↗
PubMed1977

The use of prostaglandin E1 for enhanced visualization of the splanchnic circulation.

A single bolus injection of prostaglandin E1 (5-7.5 microgram) into the superior mesenteric, hepatic or pancreatico-duodenal arteries was employed as a pharmacoangiographic aid in 22 patients. Good quality arterial phase and greatly enhanced portal venograms were obtained. No significant complications were observed. The authors found the technique useful in diagnosis of primary and metastatic lesions in the liver and pancreas.

Abdomen↗
PubMed1977

Subintimal injection of contrast medium as a complication of selective abdominal angiography.

The frequency, cause and sequelae of subintimal injection of contrast medium as a complication of selective abdominal angiography have been evaluated. The frequency increased considerably with the degree of superselectivity. The risk of total occlusion and clot formation in the renal artery after subintimal injection is high. Injury and total occlusion of the celiac and hepatic arteries have better chance for healing than of the renal arteries. A subintimal injection in the proximal part of the superior mesenteric artery may result in the development of an aneurysm.

Abdomen↗
PubMed1977

Ether-dissolved ethiodol for lymphangiography: an experimental study.

In order to decrease administration time, the viscosity of Ethiodol was reduced by mixing it with ether; this mixture was evaluated in lymphangiography of dogs. The ether-Ethiodol solution was injected into a cannulated lymph vessel of one hind limb and compared to pure Ethiodol in the other. For the ether-Ethiodol solution, the time required for complete injection was 10-30 min in most cases compared to 60-105 min for Ethiodol alone. The radiographic appearance of the lymph vessels and nodes appeared similar on both sides, and follow-up lymphangiograms in two animals after 1 and 3 weeks showed no difference from the original study. Microscopic examination of the opacified lymph nodes on both sides revealed no histologic differences. The techniques has potential clinical application.

Animals↗