Given the rarity of 11β-hydroxylase deficiency (11βOHD), there is a paucity of data about the differences in clinical and biochemical characteristics of classic (C-11βOHD) and non-classic 11βOHD (NC-11βOHD).To characterize a multicenter pediatric cohort with 11βOHD.The clinical and biochemical characteristics were retrospectively retrieved. CYP11B1 gene sequencing was performed. Seventeen plasma steroids were quantified by liquid chromatography-mass spectrometry and compared to that of controls.102 patients (C-11βOHD; n=92, NC-11βOHD; n=10) from 76 families (46,XX; n=53) had biallelic CYP11B1 mutations (novel 9 out of 30). Five 46,XX patients (10%) were raised as males. Nineteen patients (19%) had initially been misdiagnosed with 21-hydroxylase deficiency. Female adult height was 152 cm (-1.85SDS) and male 160.4 cm (-2.56SDS).None of the NC-11βOHD girls had ambiguous genitalia (C-11βOHD 100%) and none of the NC-11βOHD patients were hypertensive (C-11βOHD 50%). Compared to NC-11βOHD, C-11βOHD patients were diagnosed earlier (1.33 vs. 6.9 years, p<0.0001), had higher bone age-to-chronological age (p=0.04) and lower adult height (-2.46 vs. -1.32SDS, p=0.05). The concentrations of 11-oxygenated androgens and 21-deoxycortisol were low in all patients. The baseline ACTH and stimulated cortisol were normal in NC-11βOHD. Baseline cortisol, cortisone, 11-deoxycortisol, 11-deoxycorticosterone and corticosterone concentrations, and 11-deoxycortisol/cortisol, 11-deoxycorticosterone/cortisol and androstenedione/cortisol ratios were higher in C-11βOHD than NC-11βOHD patients (p<0.05). The 11-deoxycortisol/cortisol ratio >2.2, <1.5 and <0.1 had 100% specificity to segregate C-11βOHD, NC-11βOHD and control groups.NC-11βOHD can escape from clinical attention due to relatively mild clinical presentation. However, steroid profiles enable the diagnosis, differential diagnosis, and subtyping of 11βOHD.
Melek Yildiz, Emregul Isik, Zehra Yavas Abali, Mehmet Keskin, Mehmet Nuri Ozbek, Firdevs Bas, Seyit Ahmet Ucakturk, Muammer Buyukinan, Hasan Onal, Cengiz Kara, Karl-Heinz Storbeck, Feyza Darendeliler, Atilla Cayir, Edip Unal, Ahmet Anik, Huseyin Demirbilek, Tugba Cetin, Fatma Dursun, Gonul Catli, Serap Turan, Henrik Falhammar, Tugba Baris, Ali Yaman, Goncagul Haklar, Abdullah Bereket, Tulay Guran