ESPE Abstracts

Introduction: Prohormone convertases are a family of proteins that mediate the processing and activation of peptide hormones and neuropeptide precursors. Homozygous mutations of the PCSK1 gene result in prohormone convertase 1 deficiency that is characterized by diarrhea, hypoglycemia, multiple pituitary hormone deficiency beginning from neonatal period and obesity beginning after infancy.Case: A 35-day-old boy was referred to our hospit...

Pseudohypodosteronism type 1 (PHA-1) is an inherited disease caused by the resistance of peripheral tissues to aldosterone, leading to severe salt loss in infants. This rare disease is caused by mutations in the amiloride-sensitive epithelial sodium channel subunits (ENaCs). Loss-of-function mutations in ENaCs lead to PHA-1, which is associated with neonatal salt wasting. PHA1 can be transmitted as autosomal dominant and recessive forms. Patients with the autosomal dominant fo...

Introduction: Rabson-Mendenhall Syndrome (RMS) is an autosomal recessive, extremely rare, serious insulin resistance syndrome that occurs as a result of mutation in the insulin receptor (INSR) gene. Pathogenic variants in the INSR gene cause a broad spectrum of inherited insulin resistance syndromes. Here, a male case who presented with the complaint of diffuse acanthosis nigricans and was diagnosed with RMS is shared. Case Repor...

Background: Paternally expressed mono-allelic pathogenic variants in the MAGEL2 (melanoma antigen L2) gene cause Schaaf-Yang syndrome (SHFYNG), a multisystem disorder with psychomotor delay, intellectual disability, behavioral abnormalities, and obesity. Severity of the disease is highly variable, some patients may die in utero and some can live with moderate disabilities. MAGEL2 gene is located in the 15q11.2– q13 region which includes...

Introduction: Diabetes mellitus can develop as a result different etiology. Mitochondrial diseases may also cause diabetes mellitus. However, mitochondrial mutations are generally thought to be accompanied by a severe clinical finding. We present a patient who is determined 80% heteroplasmic deletion in the MT-DNT1 gene, with hearing loss and mitochondrial diabetes, which is quite different from the classical phenotype.Case:</str...

Introduction: Neonatal diabetes, defined as the onset of diabetes within the first six months of life, is very rare disease. Several genetic factors caused to neonatal disease have been identified to date. PTF1A (pancreatic transcription factor 1a) play a key role in early pancreas development and cerebellar neurogenesis. Biallelic mutations in PTF1A have been reported in patients with pancreatic and cerebellar agenesis, whereas mutations loc...

Introduction: The most common causes of hyperthyroidism in the pediatric age group are autoimmune conditions (Graves' disease or Hashitoxicosis). Hyperfunctioning thyroid carcinomas are rarely reported. In this case report, we present a 17-year-old girl who was diagnosed with papillary thyroid carcinoma upon testing for hyperthyroidism.Case: A 17-year-old girl had presented to another center with a 1-month history of...

Introduction: Isolated hypoaldestronism is a rare endocrinopathy in a limited number of patients who secrete normal level of cortisol, due to mutation in CYP11B2. In some cases clinical diagnosis can be late and genetic analysis showed difficulties.Case 1: A 7 month-old girl infant was referred to endocrinology department due to womiting, failure to thrive and severe hyponatremia with unexplained neutropenia. She was bor...

Introduction: Testicular regression syndrome (TRS) is a rare disease characterized by testicular dysfunction that causes varying degrees of virilization defect according to the emergence period in fetal life. The majority of cases present with normal male external genitalia. However, ambigious genitalia or, more rarely, female external genitalia can be found depending on the extent and timing of the intrauterine accident. Here, we present a case of TRS with no...

Introduction: A rare cause of diabetes mellitus is Wolfram Syndrome, which arises from mutations in wolframin gene found on chromosome 4. Optic nerve atrophy, diabetes insipidus, sensorineural deafness, psychiatric problems can accompany diabetes mellitus, so it can be also named as DIDMOAD syndrome. Hypergonadotrophic hypogonadism can be rarely observed in Wolfram syndrome. A case of novel homozygous mutation in the wolframin gene has been reported because of concomitant rare...