Introduction After a vaccination, patients frequently have clinical symptoms of pain and swelling over the injection area which usually resolve 2–3 days after the injection. If the symptoms do not improve, a shoulder injury related to vaccine administration (SIRVA) will be considered, perhaps related to an improper injection technique. Herein we report our first case of a SIRVA after a Sinovac COVID-19 vaccination which occurred due to deep penetration and direction of the needle. The clinical symptoms of the patient improved after treatment with combined oral non-steroidal anti-inflammatory drugs and a short course of intravenous antibiotic. Case presentation A 52-year-old Thai male without prior shoulder pain had a Sinovac COVID-19 vaccination at his right shoulder. The injection was given by a nurse using a 27-gauge needle, 1.5 inches in length. The injection landmark was 3 finger breadths below the midlateral edge of the acromial process. The direction of the needle was 45° to the skin cephalad. Three days after receiving the vaccine the patient began to have right shoulder pain with limited range of motion and acute fever. He was admitted for medical treatment which his clinical symptoms gradually improved. Conclusion We report a case of subacromial-subcoracoid-subdeltoid bursitis following a Sinovac COVID-19 vaccine injection. This condition is rare, and usually related to an incorrect vaccination technique. To avoid this complication, nurses should identify the correct landmark, use an appropriate needle length, and point the needle in the correct direction.

Vascular involvement in neurofibromatosis type 1 is rare but has the potential to be fatal. We report a case of a patient with spontaneous rupture of a left intercostal artery aneurysm, which presented as a massive left hemothorax and was successfully treated by transarterial coil embolization.

High sensitivity (94%) and relatively high negative predictive value (85%) for Trömner sign indicate the usefulness of Trömner sign in ruling out CSM. High incidence of positive Trömner sign in presymptomatic cervical cord compression patients suggests Trömner sign could have a useful role in early detection of presymptomatic patients.

This study aimed to present the ‘dot-in-circle’ sign, which indicates the typical magnetic resonance imaging (MRI) and ultrasonographic (USG) findings for mycetoma involving soft tissue and bone. A total of 8 cases with histopathological proof of mycetoma affecting the musculoskeletal system, and that were examined via MRI and/or coexistent diagnostic ultrasonography between 2004 and 2013 in Songklanagarind Hospital were included in this study. The ‘dot-in-circle’ sign on the MRI and USG images of all the patients was reviewed by two radiologists. The analytic method was descriptive. All cases of musculoskeletal mycetoma revealed the ‘dot-in-circle’ sign on MRI, which was seen as multiple, small, round- to oval-shaped hyperintense lesions separated and surrounded by a low-signal intensity rim (circle), and a tiny, central, low-signal focus (dot). An USG study was available in four patients, and all USG findings demonstrated the ‘dot-in-circle’ sign as a central hyperechoic area (dot) surrounded by hypoechoic tissue (circle). In conclusion, the ‘dot-in-circle’ sign is a typical feature on MRI and USG findings for the diagnosis of musculoskeletal mycetoma.

Background: Transarterial embolization (TAE) is an effective procedure for the treatment of acute gastrointestinal bleeding (GIB). Factors associated with clinical success have not been well delineated. Purpose: To evaluate the technical and clinical successes of TAE for acute GIB in order to identify factors influencing clinical success and in-hospital mortality. Material and Methods: This was a retrospective study of 70 consecutive patients with GIB who underwent angiography and embolization between January 2004 and December 2011. The technical success rate, clinical success rate, and in-hospital mortality were calculated by percentage. Clinical parameters, angiographic, and embolization data were assessed for factors influencing clinical success and in-hospital survival using univariate and multivariate analysis. Statistical significance was set at P value <0.05. Results: The technical success rate was 98.6%. The primary clinical success rate was 71.4% and the secondary clinical success rate after repeat embolization was 78.6%. Bowel infarction was the most serious complication of three (4.3%) patients. Failure to achieve 30-day hemostasis can be predicted in patients who have one or more of the following factors: hemoglobin concentration <8 g/dL (P ¼ 0.004), coagulopathy (P ¼ 0.005), upper GIB (P ¼ 0.02), contrast extravasation (P ¼ 0.012), and more than one embolized vessel (P ¼ 0.005). In-hospital survival is affected by the amount of transfused packed red blood cells before embolization (P ¼ 0.008) and post-embolization bowel infarction (P ¼ 0.005). Conclusion: TAE is a feasible and effective management of acute GIB with high technical and clinical success rates. The factors influencing clinical success include hemoglobin concentration, coagulopathy, upper GIB, contrast extravasation, and more than one embolized vessel. The number of units of transfused packed red blood cells and post-embolization bowel infarction are important factors associated with in-hospital mortality.