BackgroundIntra-articular osteoid osteoma (OO) causes irreversible joint damage. Its treatment of choice is radiofrequency ablation (RFA); however, some areas of the acetabulum are hard to access. Therefore, hip arthroscopy was used to treat this tumor. We aim to systematically review the literature with regards to arthroscopic management of acetabular OO, and to report a further case in which hip arthroscopy was used for treatment.MethodsPubMed and EMBASE were searched for articles relevant to the arthroscopic management of acetabular OO on December 2, 2014. All articles published on and before that date were reviewed, and studies which met our pre-determined inclusion criteria were included. Articles screening and data abstraction were done by two reviewers independently. We also presented a 31-year-old man with acetabular OO who underwent hip arthroscopy for the management of his tumor after failing to respond to medications and computed tomography scan (CT)-guided RFA.ResultsThe initial search revealed 14 studies, of which ten met our inclusion criteria. A total of ten patients underwent hip arthroscopy for the management of acetabular OO. Only two patients were females, and the patients' age ranged from 7 to 47 years. Two patients underwent arthroscopic guided-RFA of the lesion, while the rest underwent excision. The follow-up period ranged from 6 months to 2 years. Success rate was 100 %, and no recurrence was reported. Minor complications (transient impotence and perineal numbness) developed in one patient (10 %). Arthroscopic-guided RFA failed to eliminate the tumor in our additional case. A second trial of CT-guided RFA was successful in treating the patient's condition.ConclusionsHip arthroscopy is an effective and safe option for the management of acetabular OO, with success rate exceeding 90 %. Studies of higher level of evidence are required.Electronic supplementary materialThe online version of this article (doi:10.1186/s12891-015-0779-8) contains supplementary material, which is available to authorized users.

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Summary Background This study aims to compare medical students’ educational outcomes in performing knee arthrocentesis through searching and using YouTube videos versus traditional supervisor‐led sessions. Method Seventy‐one medical students were randomly assigned to three groups. Group A had a traditional supervisor‐led clinical session, where the supervisor demonstrated the procedure. Students in group B were provided with links to YouTube videos of knee arthrocentesis that were deemed to be of high educational quality, whereas group C searched and learned from any YouTube video that they found themselves based on the learning objectives provided. Student performance was first examined following the learning sessions, and then again after receiving feedback on the performance. Results Prior to feedback, statistically significant higher mean scores were noted for group A in the identification of an appropriate puncture site (p = 0.015), puncture site sterilization (p = 0.046), wearing sterile gloves (p < 0.001) and direction of needle insertion (p < 0.001). The overall mean scores (maximum possible score is 21) before feedback for groups A, B and C were 17.9 ± 1.9, 14.9 ± 2.0 and 15.4 ± 1.8, respectively (p < 0.001). The overall mean scores after feedback for groups A, B and C were 21.0 ± 0.0, 20.9 ± 0.3 and 21.0 ± 0.0, respectively (p = 0.037). Conclusion Students performed equally whether they were provided with videos or found their own; however, without appropriate learner feedback from an instructor, YouTube videos cannot replace traditional supervisor‐led sessions for learning knee arthrocentesis.

Extracorporeal shock wave therapy had favorable outcomes in treating coccydynia. The majority of patients had partial relief of their pain and disability following this therapy.

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Our new classification scheme of FDP tendon avulsion appeared to be comprehensive and useful in guiding the surgeon for the best treatment option. Nevertheless, this should be confirmed by using it for larger number of patients with different patterns of injury.

Undoped and Al-doped SnO2 thin films have been prepared by sol–gel spin coating process on glass substrate  for different doping (0, 2.5 ,5 ,7.5,10)% The starting precursor was used as tin chloride dihydrate (SnCl2.2H2O), ethanol , with and without stabilizer. As annealing in a temperature 500°C for one hours, the results of (X-Ray ) diffraction showed that the films have a Polycrystalline structure and increased intensity when use  stabilizer and orientation was (020) with lattice constants (a=4.796, b=5.796, c= 5.193) Å.   The surface morphology of the (SnO2: Al) thin films have been studied using atomic force microscopy (AFM) which indicated that the grown films showed good crystalline and homogeneous surface. The Root Mean Square (RMS) values and surface roughness of the films increased with increasing doped concentration specify when use  stabilizer.