An unusual case of 17-hydroxylase deficiency presenting with short stature.

17α-Hydroxylase and 17,20-lyase are enzymes encoded by the CYP17A1 gene and are necessary for the production of cortisol and sex steroids. Females with 17α-hydroxylase deficiency usually present with primary amenorrhea and delayed puberty accompanied by hypertension and electrolyte imbalance. Here, we report the case of a 14-year-old female patient who presented with severe short stature and delayed puberty without any complaint suggestive of 17-hydroxylase enzyme deficiency. Laboratory test results showed low cortisol and dehydroepiandrosterone sulfate (DHEA-S) along with high luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Turner syndrome was excluded after genetic analysis showed a 46,XX karyotype, and 17α-hydroxylase deficiency was diagnosed by detecting a c.1319G>A (p.Arg440His) variation/alternation in the patient's CYP17A1 gene.