Renal hemangioma is a rare tumor which can be capillary or cavernous. There have been less than 30 renal capillary hemangioma cases reported in the English literature. Herein we will report a case of renal hemangioma which was detected in a 74-year-old man operated with the impression of urothelial carcinoma of hilum.

Background: Given the limited number of beds in intensive care units, establishing a system that can predict the outcome in COVID19 positive patients based on imaging plays an important role in using resources efficiently. Therefor this study was conducted to design an optimal scoring system related to the severity of COVID19 cases for distinguishing severe from non-severe patients. Materials and Methods: In this cross-sectional retrospective study, 82 patients with a definite diagnosis of COVID-19 infection, who had at least one chest CT scan in hospital course were enrolled.To assess the severity of pulmonary parenchymal involvement, we semi-quantitatively evaluated the extent and nature of abnormalities. The area of lung involvement was scored in three levels based on a 0-4 grading scale. Also, we established a 4-point scoring system for defining the nature of lung abnormalities. The two scores were multiplied by each other. A final radiologic severity score was determined after adding together the scores of all levels.Result: Of all cases, fifty-three (64.6%) were male with an average age of age 53.75. Among the patients in our study, 7 (8.5%) had severe disease and the mortality rate was 7.2%. The mean (±standard deviation) of the radiologic severity score was 34.3(±18.4) in the severe group and 11.3(±11.4) in the non-sever group. (P-value <0.05). Also, we found a significant reverse relationship between our severity score and O2 saturation (P-value <0.05).Conclusion: The radiologic severity score demonstrated a significant correlation with the patients' mortality and severity of illness in COVID-19 patients.

BACKGROUND Reviewing and interpretation of cross-sectional imaging studies has become the main part of Medical Imaging (formerly known as Radiology) practice over the past twenty years. The rapid changes in the practice of medical imaging however has not been paralleled by development of new teaching methods. In the current study, we present a teaching method for the radiology residents the cross-sectional anatomy of the temporal bone as a psychomotor skill.METHODS In this cross-sectional study, we included a total number of 21 radiology resident of Shiraz University of Medical Sciences for a 2-month period. We provided a teaching scheme based on the Gagne’s theory which consisted of 6 steps ie: 1-gaining attention, 2-informing the learner of the objective, 3-stimulating recall of prerequisite learning, 4-presenting the stimulus material, 5-providing learning guidance, and 6-eliciting the performance, 7-providing feedback, assessing the performance and 8-enhancing retention and transfer. The residents were evaluated before and after the training sessions using objective structured clinical examination (OSCE), resident satisfaction and educational goal achievement questionnaires.RESULTS We have included a total number of 21 radiology residents with mean age of 27.9 ± 8.6 (range from 26-38) years, 14 (66.6%) men and 7 (33.4%) women. We observed that the OSCE score improved significantly after the twenty-minute session (2.57 ± 1.62 vs. 8.02 ± 2.43; p<0.001 ). Mean resident satisfaction score measured by standardized questionnaires was 7.63 ± 2.86 on scale of 10. Regarding the achievement of educational goals, we observed that the score increased significantly after the mini-sessions (4.33 ± 1.22 vs. 8.27 ± 2.46; p=0.021 ).CONCLUSIONS Considering the interpretation of cross sectional images as a psychomotor skill, may be proven to be an effective teaching method. Using a standardized approach and defining predetermined transition points in moving between orthogonal planes can enhance learning radiology as it is today.

Background: Gastrointestinal mast cell sarcoma is a rare variant of mastocytosis. It is a unifocal tumor with high destructive capacity and metastatic potential. Diagnosis of mast cell sarcoma can be challenging and might be so delayed that unfavorable prognosis may be expected. In this case report, we will describe our experience with a case of mast cell sarcoma in the small intestine of an elderly woman, which was diagnosed early on throughout the course of her disease and successfully treated. Case presentation: The patient was a 59-year-old woman who presented with abdominal pain, flushing, weight loss, and vomiting. Imaging studies supported the existence of an infiltrative neoplasm in the jejunum. Then, surgical removal of the tumor was performed. The presence of mast cells in the resected tumor was confirmed by immunohistochemistry, histopathology, and Giemsa staining. After almost a year of follow-up, the patient's overall condition was fine, and no signs of recurrence were found. Conclusions: This is the first reported case of successfully treated gastrointestinal mast cell sarcoma. All of the previously reported cases had been diagnosed after recurrence with no response to treatment. Our case shows the significance of early diagnosis and treatment in this condition and its impact on outcome and prognosis. That could be achieved only if the pathologist has a high suspicion for this rare disease and keeps it in the back of one's mind.