Syndrome of inappropriate antidiuretic hormone (SIADH) secretion is a recognisable complication of acute porphyria. We report a nine-year-old female patient with hereditary tyrosinaemia type 1 and poor adherence to nitisinone therapy who presented with acute abdominal pain, vomiting and lethargy at Sultan Qaboos University Hospital, Muscat, Oman in 2016. She subsequently developed generalised tonic-clonic seizures attributable to severe hyponatremia that met the diagnostic criteria of SIADH. The acute porphyria screen also appeared positive. The patient responded well to fluid restriction and was discharged home without immediate neurological sequelae.  https://www.selleckchem.com/EGFR(HER).html  Although acute porphyria is also a recognised complication of uncontrolled tyrosinaemia type 1, to the best of the authors' knowledge, no patient with tyrosinaemia type 1 has been reported to present with SIADH.Paraovarian cysts constitute about 10% of all adnexal masses in females and occur most commonly in the third and fourth decades of life. These cysts are benign and usually uncommon in adolescence. Such cysts pose a diagnostic challenge while distinguishing them from ovarian cysts clinically and during radiological investigations. We report a rare case of a 13-year-old female patient with bilateral paraovarian cysts, including a giant cyst in right mesosalpinx presenting to Sohar hospital, Oman in 2018. The definitive origin of the huge mass on the right side of abdominal cavity could not be established in the current case despite contrast enhanced computerized tomography. It was only on laparoscopic exploration that this mass was identified as a giant paraovarian cyst. Both the giant cyst and a smaller paraovarian cyst on the left side were enucleated with minimally invasive surgery while preserving the fertility of the patient. Only one other similar case of bilateral paraovarian cysts in an adolescent, including a giant cyst managed with laparoscopy, has been documented previously.On 27 April 2020, the National Health Service England issued an emergency alert for a new condition owing to the observation of an increasing number of cases of a COVID-19-related hyperinflammatory syndrome termed multisystem inflammatory syndrome in children (MIS-C). Some of the presenting symptoms appeared similar to the Kawasaki disease and toxic shock syndrome. We report the cases of six children fitting the criteria of MIS-C, admitted to Royal Hospital and Sohar Hospital, Oman, between the months of June and July in 2020. Four of these patients required admission at the paediatric intensive care unit for inotropic support while two were admitted to the paediatric ward on suspicion of appendicitis. MIS-C has been reported in a small number of individuals below the age of 21 years with a median age of 9-10 years. Five of the current patients were aged less than the median age reported in the existing literature. All of the patients showed complete recovery with supportive management, intravenous immunoglobulin and steroids, with one patient requiring interleukin-6 inhibitor (tocilizumab).
  Bone failure due to avascular necrosis (AVN) is a complex pathological phenomenon. Analysis of molecular changes in the bone matrix may help to shed light on the disease process and guide management. This study aimed to explore changes in bone quality and structural damage caused by sickle cell disease (SCD)-induced AVN using Raman spectroscopy.
 
  A total of 10 necrotic femoral heads were obtained from seven SCD patients who underwent total hip replacements. The femoral heads were cut in half and scanned using Raman spectroscopy in correlation with preoperative magnetic resonance imaging to identify necrotic and healthy control areas. Subsequently, samples were examined to determine changes in bone mineralisation, crystallinity, carbonate content, collagen cross-linking and mineral and collagen fibril orientation.
 
  Significant changes were observed in bone mineral content, mineral-to-organic content and collagen fibril orientation in necrotic compared to control areas (
  ≤0.050).
 
  The necrotic samples displayed severe structural damage and loss of mineral and organic contents. Similar Raman signals have been reported in other metabolic bone diseases such as osteoporosis, thereby potentially supporting the use of medical treatment in AVN to promote bone quality.
 The necrotic samples displayed severe structural damage and loss of mineral and organic contents. Similar Raman signals have been reported in other metabolic bone diseases such as osteoporosis, thereby potentially supporting the use of medical treatment in AVN to promote bone quality.
  This study aimed to assess parental knowledge, attitudes and practices regarding antibiotic use for children with upper respiratory tract infections (URTIs).
 
  A multi-centre cross-sectional study was conducted from September 2018 to April 2019 at 15 randomly selected primary health centres in Muscat, Oman. A total of 384 parents with children under 12 years old were recruited. A validated questionnaire was utilised to determine knowledge, attitudes and practices regarding antibiotic use for children with URTIs.
 
  All 384 parents participated in the study (response rate 100%). Almost half of the participants (n = 173; 45.1%) agreed that antibiotics were the first and best treatment for URTIs in children, with 184 parents (47.9%) reporting that influenza symptoms in children improved more rapidly after the administration of antibiotics and 203 (52.9%) believing that antibiotics prevented complications. The majority (n = 219; 57.0%) of parents never gave their children antibiotics without a prescription, and 291 (75.8%) never used leftover antibiotics. Most participants (n = 233; 60.7%) stated that it was the doctor's decision to prescribe antibiotics, 192 (50.0%) had never asked a physician to prescribe antibiotics for their child and 256 (66.7%) had never changed doctors because they did not prescribe antibiotics.
 
  This study found that parents had confidence in their healthcare providers; however, it also showed the extent of their lack of knowledge regarding the use of antibiotics for children with URTIs. There is a need for both public- and healthcare professional-oriented educational initiatives to promote rational antibiotic usage in Oman.
 This study found that parents had confidence in their healthcare providers; however, it also showed the extent of their lack of knowledge regarding the use of antibiotics for children with URTIs. There is a need for both public- and healthcare professional-oriented educational initiatives to promote rational antibiotic usage in Oman.