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Biomedical subjects

M G Stiris

Publications and source records attributed to M G Stiris.

At least 19 recordsLinked to original sources
PubMed2001

[Magnetic resonance arthrography of the hip joint in patients with suspected rupture of labrum acetabulare].

INTRODUCTION: MR arthrography by direct joint puncture and instillation of contrast medium is a minimally-invasive diagnostic technique in patients with suspected acetabular labral tear. The joint is distended, and the intraarticular structures are well separated. MATERIAL AND METHODS: 31 patients with chronic hip joint pain underwent MR arthrography by direct joint puncture and instillation of diluted gadolinium to evaluate the glenoid labrum. RESULTS: The glenoid labrum was seen in all patients. Labral tear was found in ten patients. Two of these underwent arthroscopy, and the tears were verified. We also found other causes of hip pain. One patient with villonodular synovitis at MR arthrography was verified at arthroscopy. INTERPRETATION: MR arthrography is a promising diagnostic technique for evaluating the acetabular labrum.

Acetabulum↗
PubMed2000

[Magnetic resonance tomography in skeletal and soft tissue trauma].

MRI has revolutionized the diagnostic yield in musculo-skeletal trauma. Studies have documented that MRI can be an accurate, cost-effective means of assessing injuries in the knee, the foot and the ankle, and it may also be cost-effective in other anatomic locations. MRI may have a significant impact on decision-making in relation to these patients and on the follow-up. The patient does not need to be moved for evaluation in all the anatomical planes. Each study can also be post-processed if necessary. MRI may be used in patients with fractures for evaluation of complications. The fracture lines as well as accompanying soft tissue damage are well documented.

Athletic Injuries↗
PubMed2000

[Magnetic resonance tomography in sinus tarsi syndrome].

The sinus tarsi is a cone-shaped anatomical space in the hind foot that is bounded by the talus and calcaneus, the talonavicular and posterior sub-talar joint, and is continuous with the tarsal canal medially. The space courses from posteromedial to anterolateral, with the larger portion of the cone laterally situated. The sinus tarsi consists of fatty tissue, arterial anastomoses, joint recesses posteriorly, nerve endings, and five ligaments. These include the lateral, intermediate, medial roots of the inferior extensor retinaculum, the cervical ligament, and the interosseous ligament. The sinus syndrome is characterized by lateral foot pain, focal pain to palpation over the tarsal sinus, and hind foot instability. This chronic disease is related to a history of inversion trauma in the majority of patients. Magnetic resonance imaging (MRI) may be used in the evaluation of abnormalities associated with the sinus tarsi syndrome.

Calcaneus↗
PubMed2000

MR cholangiopancreaticography and endoscopic retrograde cholangiopancreaticography in patients with suspected common bile duct stones.

PURPOSE: To prospectively compare MR cholangiopancreaticography (MRCP) vs. endoscopic retrograde pancreaticography (ERCP) in patients with suspected common bile duct (CBD) stone disease. MATERIAL AND METHODS: Fifty consecutive patients with suspected CBD disease underwent MRCP and then ERCP within 12 h of each other. The result of the MRCP was blinded to the reader of the ERCP. The MRCP was done using a superconducting 1.0 T unit with a heavily T2-weighted breath-hold technique. The ERCP was done in the fluoroscopy suite by one of the clinicians and was evaluated by one of the radiologists who had not read the MRCP examinations. RESULTS: There were 28 true-positives, 17 true-negatives, 1 false-positive, and 4 false-negatives. The sensitivity was 87.5% and the specificity 94.4%, respectively. The positive predictive value was 96.6% and the negative predictive value was 81.1%. CONCLUSION: MRCP was shown to be good enough to replace ERCP as a diagnostic method in patients with suspected CBD disease. MRCP is now our modality of choice after ultrasound in the diagnostic evaluation of these patients.

Adult↗
PubMed1999

[Magnetic resonance tomography of biliary and pancreatic ducts].

Magnetic resonance imaging of the biliary and pancreatic ducts, MRCP, is a technique developed over the last few years. Using strongly T2-weighted sequences, images of the biliary and pancreatic ducts similar to ERCP can be obtained within one single inhalation. No contrast media or medication is required. In 23 patients 25 MRCP examinations were retrospectively compared with ERCP or PTC. One patient had normal findings; three had gallbladder stones. Eight out of nine common bile-duct stones were shown. MRCP after papillotomy in one patient showed a common bile-duct stone; ERCP seven days later was normal. MRCP correctly showed obstruction and dilatation of the bileducts in ten patients with tumor and in one patient with chronic pancreatitis. Two of these were erroneously interpreted as caused by stone. 21 of 25 MRCPs were consistent with the final diagnosis. We consider MRCP a promising method which may replace diagnostic ERCP in majority of patients. Stones in the gallbladder and bile-ducts can be diagnosed. The method also shows obstructions and other lesions affecting pancreatobiliary ducts.

Adolescent↗
PubMed1997

MR findings in cases of suspected impacted fracture of the femoral neck.

PURPOSE: To evaluate MR imaging of the hip in patients with a clinically suspected impacted fracture of the femoral neck in cases where conventional plain films show negative or equivocal findings. MATERIAL AND METHODS: Twenty-seven such patients were prospectively examined by MR imaging with a 1.0 T unit, within 24 hours of admittance to hospital. A coronal T1-weighted turbo spin-echo sequence (n = 27), and a coronal STIR sequence (n = 25) or a coronal T2-weighted turbo spin-echo fat saturation sequence (n = 2) were used. The evaluations were made by 2 radiologists with experience in musculoskeletal radiology. RESULTS: There were 6 patients with a pertrochanteric fracture, 2 without and 4 with slight displacement. Five patients had an impacted fracture of the femoral neck, and 3 had a fracture of the superior pubic bone. Of 2 patients with advanced arthrosis, 1 had an impacted femoral neck fracture and the other a nondisplaced intertrochanteric fracture. There was 1 patient who had sustained a nondisplaced acetabular fracture with increased joint fluid and muscle contusions. Three patients had muscle contusions only. Two patients had bone marrow contusions only, while 2 others with advanced coxarthrosis had increased joint fluid only. Three patients showed normal findings. Our findings led to emergency surgery in 13 cases, and conservative measures directed to the specific MR findings in 14 patients. CONCLUSION: MR imaging should be the first modality of choice in examining patients with a clinically suspected impacted fracture of the femoral neck where conventional films show negative or equivocal findings.

Aged↗
PubMed1994

[Selective catheterization of the inferior petrosal sinus].

The inferior petrosal sinus is a dura sinus which traverses laterally and dorsally from the dorsal aspect of the cavernous sinus. It represents the nearest catheterization point for blood sampling from the pituitary gland. Inferior petrosal sinus venous sampling is used for diagnosis and lateralization of ACTH-secreting and growth hormone-producing hypophyseal adenomas. It is also used in the differential diagnosis of ectopic production of ACTH or other similar peptides. We briefly describe the anatomy of the inferior petrosal sinus and the catheterization technique, based on our experience from 15 patients. The endocrinological results are published in a separate article.

ACTH Syndrome, Ectopic↗
PubMed1994

[Analysis of blood from the inferior sinus petrosus in patients with Cushing syndrome and acromegaly].

Bilateral catheterization of sinus petrosus inferior was performed in ten patients with Cushing's syndrome and five patients with acromegaly. This was done in order to secure the diagnosis (Cushing's syndrome) and localize an adenoma (Cushing's syndrome and acromegaly). Blood from sinus petrosus inferior on both sides and from the peripheral vein was analyzed for concentration of ACTH or growth hormone after injection of ACTH-releasing hormone and growth hormone-releasing hormone respectively. The quotient between the ACTH concentration in blood from sinus petrosus and peripheral blood determines the diagnosis in Cushing's syndrome and the quotient between the concentration of ACTH or growth hormone between right and left sinus petrosus determines localization of the pituitary adenoma. Correct diagnosis and localization of ACTH-producing pituitary adenoma was found in eight of ten patients with Cushing's syndrome. One result was doubtful and one was wrong. In four patients with Cushing's disease (ACTH-producing adenoma) magnetic tomography (MT) was negative, but catheterization showed the presence of adenoma. In acromegalic patients, correct localization of the adenoma was determined in two out of five patients. In the other three patients, anatomical difficulties prevented satisfactory interpretation.

Acromegaly↗