Highlights• The majority of cases were in the age group of 50 to 60 years of old.•A total of 2964 cases of COVID-19 were investigated. J o u r n a l P r e -p r o o fThe datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Purpose Unidentified dynamics for the causative agent of COVID-19, SARS-Cov-2, led to the critical public health issue. Suspicion for the airborne potential of SARS-Cov-2 is an important problem for its transmission and relevant epidemics. This research investigated hospital indoor air quality to SARS-Cov-2 occurrence and determination its air born potential. Methods The site study was a referral hospital with 630 beds for admitting of COVID-19 patients. Air sampling was done (n = 31) on selected wards including Emergency 1, Emergency 2, bedridden (4-B, 10-D), ICU 2, ICU 3, CT-SCAN, and laundry. The average temperature and relative humidities were 22 ± 1°C and 43 percent respectively. All glass impinger used for sampling in which the sampling pumps capacities were 5 and 40 L.min − 1. Sampling duration time was 20 and 15 minutes and 100 to 1000 L of air were gathered. All parts of the sampling equipment were completely disinfected by hot water, ethanol (70%), chlorine solution (1000 ppm), hot water (70°C for 1 min) and washed with distilled water. The transmitting media (7 ml) was injected into impinger and residual of this media (2 ml) was sent to the virology laboratory within 2 hours and preserved on refrigerator < 4°C. Analysis of samples was performed by RT-PCR and repeated for accuracy control. Results All of the samples were negative for SARS-Cov-2 occurrence. These results showed that SARS-Cov-2 had not airborne potential in this hospital. Conclusions Although SARS-Cov-2 similar to the SARS virus but, SARS-Cov-2 is not an airborne virus.

Male breast enlargement as gynecomastia may be as a sign of underlying systemic diseases. Male breast malignancy is also considered in differential diagnosis. We present a young man with primary chest wall lymphoma as gynecomastia, without pre-existing problem or other disease. Here, we present his clinical manifestation, management, and his early outcome. Chest wall lymphoma as an initial presentation of isolated chest wall mass in males is a rare clinical entity and its presentation as gynecomastia is even extremely unusual. © 2019 Tehran University of Medical Sciences. All rights reserved. Acta Med Iran 2019;57(4):276-279.

Background:Obstructed defecation syndrome (ODS) occurs in about 7% of adults; it seems that the etiology of pelvic floor disorders is multifactorial. Pregnancy and childbirth damage to the pelvic nerve and muscles are proposed causes for this condition. The precise role of vaginal delivery (VD) is not clearly defined, although in recent studies association of pelvic floor disorder with Operative vaginal delivery and episiotomy has been proposed.Objectives:In this prospective study, we assessed the outcome of stapled transanal rectal resection (STARR) in females with one of the two modes of delivery (VD or caesarean section (C/S).Patients and Methods:We used Longo’s ODS score for the assessment of the severity of pelvic floor malfunction. Stapled Trans Anal Rectal Resection (STARR) procedure was performed using two circular staplers. Follow-up was done 12 months after the discharge. To assess the role of episiotomy in patient with VD, we divided them into two subgroups; females who had VD with episiotomy (Vd + epi) and females who had VD alone. Data were analyzed using SPSS version 20 software. P values less than 0.05 were considered statistically significant.Results:In 30 consecutive females undergoing STARR for the treatment of ODS, who enrolled in this prospective study, 19 (63.3%) had Vaginal Delivery VD and 11 (36.7%) had Cesarean Section (C/S). The ODS score before the surgery was higher in females who had C/S, although there was no significant difference between VD and C/S groups in terms of the percentage of the ODS score improvement after the STARR surgery.Conclusions:Higher ODS score in females who had C/S showed that C/S could not protect the pelvic organ from pregnancy and delivery trauma. It seems that episiotomy has a protective effect during VD; it can reduce the severity of trauma in pelvic organs during childbearing.

Aims: Mechanical bowel obstruction is a frequent surgical emergency and a frequently confronted burden in abdominal operation. This study aimed to find out the model of mechanical bowel obstruction in the Iranian population. Methods and materials: In this study, all patients with clinical and radiological evidence of mechanical bowel obstruction that admitted to the Department of Surgery of Baqiyatallah Hospital with a diagnosis of mechanical bowel obstruction from January 2012 to December 2015 were included. The age, gender, symptoms operative details, postoperative complications, outcome, and mortality, were recorded. Results: 193 patients with mechanical bowel obstruction were admitted in our study. Regarding the clinical presentation of the patients, the absence of passage of flatus and/or feces with abdominal pain (65.8%) were the most common presenting symptoms. Adhesions, colonic volvulus, hernias, different types of colorectal cancer were the most frequent causes of obstruction (54.9%, 15.54%, 7.2%, and 9.8%, respectively). Twenty-one patients died, resulting in a mortality rate of 10.9%. In the 19 patients with colorectal cancer, 7 (31.6%) patients have died and cause of death in all them related to cancer disease. Conclusion: The results showed that the most common mechanisms of intestinal obstruction were adhesions, volvulus, cancers, and hernias, respectively, and the most common risk factors were appendectomy history, herniation surgery history, and cholecystectomy history, respectively. About 21 patients (10.8%) underwent obstruction surgery with a diagnosis of malignancy, which was confirmed in 19 cases of tumor pathology, of which about one third had recurrence within 3 years.