A five-year-old boy with anaphylaxis reaction to gadolinium-based MR contrast medium: a case report.

Magnetic resonance imaging (MRI) is one of the most widely used tests in orthopedic areas. Gadolinium-based magnetic resonance (MR) contrast media are commonly used for MRI tests. They are known to be safe with little side effects and low incidence of acute adverse reactions. Although not common, immediate hypersensitivity reaction can occur in some patients after administration of gadolinium-based MR contrast media, causing skin rash, vascular edema, dyspnea, abdominal pain, hypotension, altered mental status, cardiopulmonary arrest, and even death. During a knee joint MRI test in a 5-year-old boy, anaphylaxis, a serious symptom, occured after injecting gadolinium-based MR contrast medium. Here we report this case along with a literature review.

Corrigendum to "Component Asymmetry in Bilateral Cementless Total Hip Arthroplasty".

[This corrects the article on p. 27 in vol. 15, PMID: 36778988.].

Superior mesenteric artery syndrome in a patient with fibrodysplasia ossificans progressiva.

An 18-year-old boy with fibrodysplasia ossificans progressiva lost weight at an accelerated rate due to gastrointestinal symptoms, resulting in a weight loss of 36 kg in 1 year. His first outpatient abdominal computed tomography (CT) result was unremarkable. Since the patient had biliary vomiting during hospitalization, his CT was reexamined, and the superior mesenteric artery syndrome diagnosis was confirmed. Thus, clinicians must consider superior mesenteric artery syndrome when presented with weight loss.

Component Asymmetry in Bilateral Cementless Total Hip Arthroplasty.

Background: This study investigated the results of component asymmetry (CA) in bilateral cementless total hip arthroplasty (THA). Methods: This study included 300 patients, who underwent bilateral cementless THA between April 2000 and December 2017. They were divided into the component symmetry (CS) and CA groups; CA group was sub-classified into acetabular component asymmetry (ACA) and femoral component asymmetry (FCA). Radiologic and clinical outcomes of the CA group were compared with those of the CS group. Results: The incidence of CA was 25.7% (77/300 patients), including 55 patients with ACA, 34 patients with FCA, and 12 with both components asymmetric. The mean time interval between operations in the CA group was significantly longer than that in the CS group (p < 0.001). The mean differences in horizontal and vertical distances from teardrop to the center of rotation of the acetabular component between both hips in the ACA group were significantly larger than those in the CS group (p = 0.033 and p < 0.001, respectively). The mean femoral component alignment angle difference between both hips was significantly larger in the FCA group than in the CS group (p < 0.001). The mean Harris Hip Score at last follow-up of the CA group was similar to that of the CS group. Conclusions: CA in patients undergoing bilateral cementless THA was not rare, especially with a longer time interval between operations. Regardless of CA, when stable fixation of the components was achieved, satisfactory radiologic and clinical outcomes were obtained.

Screw only versus screw plus plate in isolated talonavicular arthrodesis.

BACKGROUND: We aimed to compare outcomes of treatment of isolated talonavicular arthrodesis (ITNA) with screw only or screw plus plate, respectively. METHODS: We retrospectively evaluated 40 consecutive cases of ITNA [two-screw fixation patients: Group 1 (23 cases); screw-plus-plate fixation patients: Group 2 (17 cases)]. Outcome measures included radiographic findings, Foot and Ankle Outcome Scores (FAOS), and visual analogue scale (VAS) scores. RESULTS: Nonunion occurred more frequently in group 1 (21.7%) than in group 2 (5.9%), but there was no statistical significance (p = 0.216). Although the preoperative FAOS and VAS score showed similar results between both groups, there were significantly better clinical outcomes in two of five FAOS domains and VAS scores at 3 months postoperative and final follow-up (p < 0.05). CONCLUSION: Although union rates were not significantly different, nonunion occurred more frequently in screw only group and we obtained more favorable clinical outcomes in screw plus plate group.