Homozygous variant FOXE3 causes autosomal recessive anterior segment dysgenesis type 2: a case report

Background: Anterior segment dysgenesis (ASD) is a developmental condition that affects the frontal part of the eyes. Genetic mutations in FORKHEAD BOX E3 can lead to a variety of ASD conditions. Case Presentation: Here, we report a 2-year-old female patient with ASD type 2 autosomal recessive linked disease. Whole exome sequencing test was conducted and resulted in a missense mutation at position 120 altering arginine to proline. To our knowledge, this is the first case reported in Oman. Conclusion: For patients with ASD, it is crucial to take the full family history and genetic work up to aid in the diagnosis and long-term management of the condition. [JBCGenetics 2023; 6(1.000): 75-79

Progressive pseudorheumatoid dysplasia in an Omani family: a case report

Background: Progressive pseudorheumatoid dysplasia (PPRD) is an inherited autosomal recessive musculoskeletal condition caused by mutations in the Cellular Communication Network Factor 6 (CCN6) gene. This causes a variety of clinical features such as short stature, genu varum, etc. Case Presentation: This study reported cases of three patients from the same family who exhibited the clinical features of PPRD, and the condition was diagnosed through confirmatory genetic testing. The whole exome sequencing test results for the 15-year-old and 3-year-old males revealed a class-5 pathogenic homozygous mutation in the CCN6 gene, resulting in both individuals being diagnosed with autosomal recessive PPRD. The results for the third patient had not come out yet. Conclusion: For patients with PPRD, it is necessary to take the full family history and genetic testing that might help in the diagnosis and treatment of the condition. [JBCGenetics 2023; 6(1.000): 85-88

Metabolic and other morbid complications in congenital generalized lipodystrophy type 4

Morbidity and mortality rates in patients with autosomal recessive, congenital generalized lipodystrophy type 4 (CGL4), an ultra-rare disorder, remain unclear. We report on 30 females and 16 males from 10 countries with biallelic null variants in CAVIN1 gene (mean age, 12 years; range, 2 months to 41 years). Hypertriglyceridemia was seen in 79% (34/43), hepatic steatosis in 82% (27/33) but diabetes mellitus in only 21% (8/44). Myopathy with elevated serum creatine kinase levels (346–3325 IU/L) affected all of them (38/38). 39% had scoliosis (10/26) and 57% had atlantoaxial instability (8/14). Cardiac arrhythmias were detected in 57% (20/35) and 46% had ventricular tachycardia (16/35). Congenital pyloric stenosis was diagnosed in 39% (18/46), 9 had esophageal dysmotility and 19 had intestinal dysmotility. Four patients suffered from intestinal perforations. Seven patients died at mean age of 17 years (range: 2 months to 39 years). The cause of death in four patients was cardiac arrhythmia and sudden death, while others died of prematurity, gastrointestinal perforation, and infected foot ulcers leading to sepsis. Our study highlights high prevalence of myopathy, metabolic abnormalities, cardiac, and gastrointestinal problems in patients with CGL4. CGL4 patients are at high risk of early death mainly caused by cardiac arrhythmias