Finite element analysis of malposition in bi-unicompartmental knee arthroplasty.

Purpose: Bi-unicompartmental knee arthroplasty is a less invasive treatment than a total one, great advantage for the patient but more difficult for the surgeon because of the lower visibility during surgery; this can therefore lead to eventual small errors in cutting angles during the procedure. The aim of this study is to investigate the effects of these slight angle variations in terms of anterior-posterior slope for the lateral tibial tray.

Methods: The geometries of the bones were acquired and uncemented fixed bearing metal-back UKAs virtually implanted in a finite elements environment.

Staghorn cystine stone in a 72-year-old recurrent calcium stone former.

This case deals with the first diagnosis of Type B cystinuria with cystine nephrolithiasis in a 72-year-old male. Cystinuria is an inherited disease that consists of congenital abnormalities of renal and intestinal transport of dibasic amino acids. It often leads to frequent recurrent stone formation.

Results of vardenafil mediated power Doppler ultrasound, contrast enhanced ultrasound and systematic random biopsies to detect prostate cancer.

Purpose: We evaluated the ability of the phosphodiesterase-5 inhibitor vardenafil to increase prostate microcirculation during power Doppler ultrasound. We also evaluated the results of contrast and vardenafil enhanced targeted biopsies compared to those of standard 12-core random biopsies to detect cancer.

Materials And Methods: Between May 2008 and January 2010, 150 consecutive patients with prostate specific antigen more than 4 ng/ml at first diagnosis with negative digital rectal examination and transrectal ultrasound, and no clinical history of prostatitis underwent contrast enhanced power Doppler ultrasound (bolus injection of 2.

Videourodynamics in patients with neurogenic bladder due to multiple sclerosis: our experience.

Purpose: The aims of this study were to: (a) analyse the most frequent morphofunctional features of the lower urinary tract observed during videourodynamic examination in patients with neurogenic bladder due to multiple sclerosis; (b) investigate the role of the videourodynamic examination in the clinical management of these patients; and (c) demonstrate the relationship between morphological and functional variables.

Materials And Methods: We performed videourodynamic examinations in 75 patients affected by neurogenic bladder secondary to multiple sclerosis.

Results: The introduction of pharmacological therapy, based on clinical and functional evaluation of the lower urinary tract, is correlated with satisfactory morphofunctional outcomes, reducing moderate-to-severe postvoid residual (PVR; p < 0.

CT-guided radiofrequency ablation of osteoid osteoma: long-term results.

The aim of the study was to assess the safety and efficacy of CT-guided percutaneous radiofrequency (RF) ablation of osteoid osteoma (OO). From 1997 to 2001, RF ablation was performed on 38 patients with OO, diagnosed clinically and by radiography, scintigraphy, contrast-enhanced MRI, and CT. Treatment was performed via percutaneous (n=29) or surgical (n=9) access, under CT guidance in all cases, with an 18-gauge straight electrode.

Tc 99m-Sestamibi scintimammography in the differentiation of benign and malignant breast microcalcifications.

The capability of the mammography-scintimammography combination to distinguish between benign and malignant isolated clusters of breast microcalcifications is discussed. Scintimammography using Tc 99m-Sestamibi was performed in 97 women with an isolated cluster of microcalcifications on mammograms. Seventy-two women had final histopathologic diagnoses (24 cancer and 48 benign pathology).

Laparoendoscopic treatment of gastric ectopic pancreas.

A case of ectopic pancreas located on the anterior gastric wall treated with a combined gastroscopic and laparoscopic approach, which permitted isolation and complete resection of the lesion, is reported. The patient was discharged without complication.

Percutaneous management of multiple bilateral liver abscesses complicating Crohn disease.

Liver abscess is a rare complication of Crohn disease. A case of multiple, bilateral, pyogenic liver abscesses appearing as a recurrent manifestation of Crohn disease in a 34-year-old man is reported. Conservative management with antibiotics, double-catheter drainage, and multiple aspirations was successful.

MR virtual endoscopy of the upper urinary tract.

Objective: We investigated the feasibility of applying surface-rendered virtual endoscopy to the visualization of the upper urinary tract by processing unenhanced MR urography data sets.

Subjects And Methods: Twenty-six patients, having neoplastic lesions (n = 9), calculi (n = 8), pelviureteric junction stenoses (n = 4), postoperative fibrotic strictures (n = 3), and extrinsic compressions of the ureter (n = 2), underwent unenhanced MR urography. Virtual endoscopy of the upper urinary tract was obtained using a thresholding technique and surface-rendering MR urography data sets.

Laparoscopic radiofrequency thermal ablation of hepatocarcinoma: preliminary experience.

The objective was to evaluate the feasibility, safety, and effectiveness of radiofrequency thermal ablation (RFT), performed during laparoscopy with a cooled-tip electrode needle, in the treatment of neoplastic hepatic focal lesions. Seven patients with hepatocarcinoma (10 hepatic lesions) were treated during laparoscopy with RFT using a 100-watt RF generator and 17-gauge, dual-lumen, cooled-tip electrode needles with a 3-cm exposed tip. The mean exposure time was 12 minutes for each needle insertion.

[Correlation of ultrasound and galactography in the diagnosis of nipple discharge. Preliminary results].

Introduction: Several pathologic conditions involving the breast ductal tree can cause bloody or serous nipple discharge. Galactography plays a major clinical role in identifying and localizing intraductal masses, but its sensitivity in detecting cancer is certainly suboptimal. Presently high-frequency ultrasound (US) probes allow detection and guided biopsy of intraductal lesions.

Radio-frequency thermal ablation of liver metastases with a cooled-tip electrode needle: results of a pilot clinical trial.

The aim of this study was to evaluate feasibility, safety, and effectiveness of radio-frequency (RF) thermal ablation, performed by using a cooled-tip electrode needle, in the treatment of liver metastases. Twenty-nine patients (20 males and 9 females; age range 43-77 years) with one to four hepatic metastases 1.1-4.

Combined transcatheter arterial chemoembolization and percutaneous ethanol injection for the treatment of large hepatocellular carcinoma: local therapeutic effect and long-term survival rate.

The aim of our study was to investigate local therapeutic effects and long-term results of combined transcatheter arterial chemoembolization (TACE) and percutaneous ethanol injection (PEI) in the treatment of large hepatocellular carcinoma (HCC). Eight-six patients (67 males and 19 females, age range 48-75 years, mean age 65.1 years) with Child-Pugh class A (n = 48) or B (n = 38) liver cirrhosis and a large HCC (main tumor 3.

[Doppler color US in the diagnosis and treatment of iatrogenic pseudoaneurysms].

Pulsatile masses occur increasingly as a complication of transfemoral or transaxillary percutaneous catheterization, as the number of catheterization procedures and their complexity has increased. These iatrogenic injuries may be represented by a pseudoaneurysm or by a periarterial hematoma with transmitted arterial pulsation: the 2 vascular injuries require prompt differentiation because pseudoaneurysms need treatment by means of US-guided compression or surgical repair. Nineteen patients (10 men and 9 women, aged 40-85 years, mean: 62 years) with a groin (no.

[Combined treatment of hepatocarcinoma with chemoembolization and alcohol administration. Long-term results].

We investigated the long-term outcome of combined transcatheter arterial chemoembolization (TACE) and percutaneous ethanol injection (PEI) for the treatment of hepatocellular carcinoma (HCC). A series of 86 patients with biopsy-proved HCC were treated at our Institution January, 1991, to June, 1996. All patients had a single primary tumor bigger than 3 cm, occurring solitary or associated with no more than 2 daughter nodules.

Intrahepatic metastatic nodules of hepatocellular carcinoma detected at lipiodol-CT: imaging-pathologic correlation.

Background: The purpose of this study was to determine whether tiny (< 2 cm) areas of iodized-oil retention diagnosed as intrahepatic metastatic nodules of hepatocellular carcinoma (HCC) at computed tomography (CT) following intraarterial injection of Lipiodol (Lipiodol-CT) correlate with truly cancerous foci on the corresponding sectioned pathologic specimens.

Methods: Thirty-two consecutive patients with biopsy-proven HCC (26 men and six women, aged 41-72 years) underwent prospective evaluation with Lipiodol-CT before undergoing surgery (hepatic resection, 30 patients; liver transplantation, two patients). Imaging findings were correlated with intraoperative and pathologic findings.

Differentiation of hepatocellular adenoma and focal nodular hyperplasia of the liver: comparison of power Doppler imaging and conventional color Doppler sonography.

The aim of our study was to compare the diagnostic efficacy of power Doppler imaging and conventional color Doppler sonography for differentiating between hepatocellular adenoma (HCA) and focal nodular hyperplasia (FNH) of the liver. Thirty-one focal liver lesions (in 29 patients) with histologic proof of HCA (n = 9) or FNH (n = 22) were studied with power and color Doppler sonography according to a standardized examination protocol. The size of the lesions ranged between 1.

Long-term results of percutaneous ethanol injection therapy for hepatocellular carcinoma in cirrhosis: a European experience.

The objective of our work was to evaluate the long-term results of percutaneous ethanol injection (PEI) for the treatment of hepatocellular carcinoma (HCC) in patients with liver cirrhosis. A total of 184 cirrhotic patients with HCC underwent PEI as the only anticancer treatment over an 8-year period. Patients were followed after therapy by means of clinical examinations, laboratory tests, and US and CT studies performed at regular time intervals.

Usefulness of echo-color Doppler in differentiating parathyroid lesions from other cervical masses.

The aim of our study was to clarify possible differential color Doppler US features between parathyroid lesions and other cervical masses. A total of 56 parathyroid lesions in 54 patients with primary hyperparathyroidism were preoperatively examined with color Doppler sonography. Color Doppler flow patterns were compared with those of 72 thyroid nodules and 20 cervical lymph nodes.

Assessment of tumor vascularity in hepatocellular carcinoma: comparison of power Doppler US and color Doppler US.

Purpose: To compare power Doppler ultrasound (US) with conventional color Doppler US for the assessment of tumor vascularity in hepatocellular carcinoma (HCC).

Materials And Methods: Fifty-one patients with 88 histologically proved HCCs were examined with power and color Doppler US according to a standardized examination protocol. Findings at Doppler studies of each lesion were correlated with findings at digital subtraction angiography.

Peripheral ischemic occlusive arterial disease: comparison of color Doppler sonography and angiography.

We examined 334 legs in 167 consecutive patients with advanced peripheral ischemic disease using color Doppler sonography and angiography. Angiography revealed 714 lesions (369 nonsignificant stenoses, 297 significant stenoses, and 48 occlusions) in the 334 legs examined. Overall, color Doppler sonography revealed diagnostic agreement with angiography in 668 of 714 lesions (93.