FP images provide diagnostically useful information by depicting tissue vascularization and perfusion.

The aim of the study is to develop a clinically useful and reproducible method for evaluating lateral meniscal extrusion in normal and transplanted knees under different axial loading conditions. Magnetic resonance imaging (MRI) and ultrasound (US) were used to assess meniscal extrusion. Both types of imaging were performed at least 6 months postoperatively (mean 23.5 months). Coronal MR images (DESS-3D sequence) of the lateral compartments of 10 normal knees and 17 transplanted lateral knees were analyzed. Extrusion was defined as the distance measured from the femoral condyle or tibial plateau to the outer edge of the meniscus. Subjects were examined in the supine position. Ultrasound print-outs of the lateral compartment of both knees of ten patients (transplanted side and contralateral normal side) were analyzed. Extrusion cross-sectional area (CSA) and distance were measured just anterior to the lateral collateral ligament: the former was defined as the CSA of the meniscus outside the knee, the latter as the greatest distance from a line connecting the femur and tibia to the outer edge of the lateral meniscus. Patients were examined in the supine position, bipodal stance and unipodal stance. The viable meniscal allograft was securely sutured to a bleeding functional meniscal rim. No bone blocks were used to fix the allograft; instead, the anterior and posterior horn were firmly sutured to their enthesis. The MRI results (tibial) show the transplanted lateral meniscus to be significantly (p<0.005) more extruded in comparison to the normal lateral meniscus. The anterior horn (mean 5.8 mm, SD=2.8) of the transplanted lateral meniscus tends to be more extruded than the posterior horn (mean 2.7 mm, SD=1.48). The posterior horn of the normal lateral meniscus does not (mean 0 mm) extrude, while the mean extrusion of the anterior horn is 0.8 mm (SD=0.92). In the US results, the transplanted lateral meniscus is significantly (p<0.005) more extruded than the normal lateral meniscus in all patient positions. Both cross-sectional surface and distance are equally good parameters to determine meniscal extrusion. There is no statistical difference between patient positions. The transplanted lateral meniscus extrudes, in the supine position, bipodal and unipodal stance 6.43 (SD=1.84), 6.01 (SD=1.93) and 6.99 mm (SD=2.7) respectively. The extrusion surface of the lateral transplanted meniscus is 50.50 mm2 (SD=15.32), 47.24 mm2 (SD=14.35) and 58.61 mm2 (SD=29.65) in the supine position, bipodal stance and unipodal stance respectively. The normal lateral meniscus extrudes in the supine position, bipodal and unipodal stance 3.77 (SD=1.76), 3.94 (SD=1.66) and 3.79 mm (SD=1.79) respectively. The extrusion surface of the normal lateral meniscus is 22.42 mm2 (SD=12.54), 23.24 mm2 (SD=12.74) and 24.79 mm2 (SD=10.18) in the supine position, bipodal stance and unipodal stance respectively. The presented data shows that the transplanted lateral meniscus, without bone block fixation but with firm fixation of the horns to the original en...

Addition of MRI to CT in consensus reading with a radiologist results in a moderate decrease of the CTV, but an important decrease of the interobserver delineation variation, especially at the prostatic apex.

Dynamic, contract-enhanced, subtraction MR images may be useful to differentiate malignant from benign soft-tissue masses.

A retrospective study evaluated meniscal suturing using an inside-out technique vs. an all-inside technique (Biofix meniscus Arrow). Fifty-five knees in 55 patients who underwent closed meniscus repair between 1985 and 1995 were divided in two groups: 20 managed by an inside-out technique; and 35 managed by an all-inside technique. All patients underwent the same postoperative program of partial weight bearing, immediate motion, and rehabilitation of the knee. They were subjected to a clinical examination using Hospital for Special Surgery knee rating system. The mean follow-up was 13 years, 2 months (11 years, 11 months-15 years, 4 months) in the inside-out group and 6 years, 5 months (6 years-6 years 10 months) in the Biofix Arrow group. Sixteen patients also had an anterior cruciate ligament injury, of which six were repaired at the time of meniscus repair and one 6 years after meniscal repair. Thirty-nine patients had an excellent or good result (87% satisfactory outcome), three had a fair result, and three had a poor result. Meniscal suturing thus provides good clinical long-term results. The advantages of an all-inside technique include short operating time, superfluous capsular exposure, easier technique, and potentially lower risk of neurovascular lesions, especially when posterior horns are involved.