Influence of the Length Ratio Between Second and Third Metatarsals After Modified Weil Osteotomy on Clinical Outcomes.

Metatarsalgia is a frequent foot disorder. The objective was to evaluate whether the length ratio between the second and the third metatarsals after Weil osteotomy influences clinical outcomes. This retrospective study included 37 patients (53 feet).

Degenerative Lumbar Spinal Stenosis.

Degenerative lumbar spinal stenosis is the most frequent cause of low back pain and/or sciatica in the elderly patient. Epidemiology, pathophysiology, clinical manifestations and testing are reviewed in a wide current bibliographic investigation. The importance of the relationship between clinical presentation and imaging study, especially magnetic resonance imaging (MRI), is emphasized.

First metatarsophalangeal joint- MRI findings in asymptomatic volunteers.

Objectives: To evaluate the spectrum and frequency of MR findings of the first metatarsophalangeal joint (MTPJ) in asymptomatic volunteers.

Methods: MR imaging of 30 asymptomatic forefeet was performed with a dedicated extremity 1.5-Tesla system.

Adhesive capsulitis of the knee.

The authors describe the case of a 42-year-old woman presenting with significant knee pain and disability. Her imaging findings using contrast MR imaging and FDG PET/CT suggested adhesive capsulitis, which was confirmed by arthroscopy, histology, and the clinical outcome.

Initial investigation of ¹⁸F-NaF PET/CT for identification of vertebral sites amenable to surgical revision after spinal fusion surgery.

Purpose: A pilot study was performed in patients with recurrent back pain after spinal fusion surgery to evaluate the ability of (18)F-NaF PET/CT imaging to correctly identify those requiring surgical intervention and to locate a site amenable to surgical intervention.

Methods: In this prospective study 22 patients with recurrent back pain after spinal surgery and with equivocal findings on physical examination and CT were enrolled for evaluation with (18)F-NaF PET/CT. All PET/CT images were prospectively reviewed with the primary objective of identifying or ruling out the presence of lesions amenable to surgical intervention.

Comparison of magnetic resonance imaging to physical examination for syndesmotic injury after lateral ankle sprain.

Background: Clinical assessment of syndesmotic injury usually consists of two tests: the ankle external rotation test and squeeze test. This study sought to determine the sensitivity and specificity of both for syndesmotic injury secondary to lateral ankle sprain.

Methods: Fifty-six patients with sprained ankles underwent clinical examination for syndesmotic injury with the aforementioned tests.

Conventional rotator cuff repair complemented by the aid of mononuclear autologous stem cells.

Purpose: To investigate the behavior of rotator cuff tears treated with conventional repair technique with the aid of autologous bone marrow mononuclear cells (BMMC).

Methods: Fourteen consecutive patients (9 women, 5 men, mean age of 59.2 years) with complete rotator cuff tears (mean preoperative UCLA score of 12 ± 3.

Bone marrow MR imaging findings in disuse osteoporosis.

Objective: To demonstrate MR imaging findings in the cortical and trabecular bone as well as marrow changes in patients with disuse osteoporosis (DO).

Materials And Methods: Sixteen patients (14 men, 2 women, aged 27-86 years) with clinical and radiographic evidence of DO of a lower limb joint (10 knees, 6 ankles) with MR examination of the same joint performed within a 1-month period were selected, as well as 16 healthy volunteers (7 men, 9 women, aged 25-75 years, 10 knees and 6 ankles). MR imaging findings of the bone marrow were analyzed by 2 musculoskeletal radiologists in consensus regarding: diffuse or focal signal alteration, reinforcement of vertical or longitudinal trabecular lines, and presence of abnormal vascularization.

Erdheim-Chester disease: case report with unique postmortem magnetic resonance imaging, high-resolution radiography, and pathologic correlation.

Erdheim-Chester disease is an infiltrative form of histiocytosis characterized by replacement of normal tissues by lipid-laden histiocytes. The disease typically infiltrates the medullary portion of the diaphysis and metaphysis of long bones, producing a characteristic radiological pattern dominated by bone sclerosis. It usually affects adults of 40 years of age with a clinical spectrum ranging from an asymptomatic focal bone lesion to multisystemic disease.

Hoffa's fat pad injuries and their relationship with anterior cruciate ligament tears: new observations based on MR imaging in patients and MR imaging and anatomic correlation in cadavers.

Purpose: To determine the normal anatomic relationships of Hoffa's fat pad with the anterior cruciate ligament (ACL) and with the frequency of Hoffa's fat pad abnormalities in ACL-deficient knees.

Design: Retrospective clinical study on patients and observational anatomic study on cadavers. The study was approved by the Institutional Review Board.

Meniscofemoral ligaments: patterns of tears and pseudotears of the menisci using cadaveric and clinical material.

Purpose: The purpose of the study was to determine the different types of pseudotears of the posterior horn of the lateral meniscus caused by the nearby meniscofemoral ligaments (MFLs), and to correlate the presence of these ligaments with patterns of meniscal tear.

Design: Retrospective clinical study with patients and prospective observatory study with cadaveric material.

Patients: Magnetic resonance imaging studies of the knee in 49 patients who had subsequent arthroscopy of the knee performed over a 1-year period at a single institution were reviewed by two readers in consensus for the presence and morphology of the MFLs of Humphry (LH) and Wrisberg (LW).

Anterior transverse ligament of the knee: MR imaging and anatomic study using clinical and cadaveric material with emphasis on its contribution to meniscal tears.

Purpose: To study the anatomy of the anterior transverse ligament of the knee (TL) and to correlate its presence with the occurrence of meniscal tears.

Patients: MR imaging studies of the knee performed over a 1-year period in 49 patients were reviewed by two readers in consensus for the presence and morphology of the TL. Ten cadaveric specimens underwent MR imaging and sectioning for anatomic and histological study.

Posterior cruciate ligament recess and normal posterior capsular insertional anatomy: MR imaging of cadaveric knees.

Purpose: To analyze the normal pattern of fluid accumulation adjacent to the posterior cruciate ligament and anatomic variations of joint capsule insertion sites in the posterosuperior corner of the human knee by using magnetic resonance (MR) imaging in cadaveric specimens.

Materials And Methods: Fourteen fresh cadaveric knees (obtained and used according to institutional guidelines, with informed consent from relatives of the deceased) from 11 men and three women (six left knees, eight right knees; age range, 70-82 years at time of death; mean age, 76 years +/- 4.4 [standard deviation]) were studied with high-spatial-resolution MR imaging performed before and after intraarticular injection of 35-45 mL gadopentetate dimeglumine.

Acromioclavicular joint osteoarthritis: comparison of findings derived from MR imaging and conventional radiography.

The purpose of this study was to determine the correlation between routine radiography and magnetic resonance (MR) imaging in the analysis of the acromioclavicular (AC) joint osteoarthritis (OA). MR imaging studies of the shoulder in 50 patients performed over a 1-year period at a single institution with corresponding conventional radiographic examinations performed within 1 month of the MR imaging study were restrospectively evaluated by the consensus of two musculoskeletal radiologists with special attention to the AC joint. As conclusion, information provided by conventional radiography in the analysis of AC joint OA does not correlate with that provided by MR imaging.

Neuropsychiatric systemic lupus erythematosus: correlation of brain MR imaging, CT, and SPECT.

Systemic lupus erythematosus (SLE) patients frequently present with neuropsychiatric symptoms. We conducted an imaging study with magnetic resonance (MR) imaging, computed tomography (CT), and single photon emission CT (SPECT) in 23 patients with SLE, 13 with major neuropsychiatric symptoms (NPSLE) and 10 without (non-NPSLE). The most frequent brain imaging findings were seen with MR imaging and were more prevalent in NPSLE: high signal intensity focal white matter lesions, infarcts in the cortex and pons, and basal ganglia lesions.

Erdheim-Chester disease: MR imaging, anatomic, and histopathologic correlation of orbital involvement.

Erdheim-Chester disease (ECD) is a rare form of histiocytosis of unknown origin characterized by tissue infiltration by lipid-laden histiocytes. Typically, the diaphyseal and metaphyseal portions of the tubular bones are affected, leading to a characteristic radiographic pattern of bone sclerosis. Orbital involvement is not infrequent and is manifested by exophthalmos and periorbital xanthomatous lesions, with associated visual problems.