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Background: Polycystic ovarian syndrome (PCOS) mimics non-classic congenital hyperplasia (NCCAH), presenting with hyperandrogenic symptoms. NCCAH is usually diagnosed later in life, where 21-hydroxylase (21OHD) is the most common deficiency. There are more than 300 mutations in 21OHD, being V281L one of the described mutations. Clinical Case: 23 y/o female patient G0P0 comes to the office complaining of irregular periods, frontal hair loss, weight gain, acne and hirsutism. She has had noticed these changes since menarche; however, her acne was getting worse. Was seen 2 months prior to presentation by her gynecologist who order a free Testosterone that was elevated (6.4 pg/mL, n&amp;lt;4.2 pg/mL), with normal TSH (1.1 uIU/mL, n,0.45-4.5). She was not taking any medication. Her mother has history of 2 spontaneous abortions and her sister has acne and hirsutism as well. On physical exam BMI was 26, it was noticed comedones and papules on her face, back and shoulders. Ferriman-Gallwey scale was &amp;gt;8. At the initial visit due to the clinical scenario, it was thought that she had hyperandrogenic syndrome, probably secondary to PCOS. Serum blood test were ordered and showed an elevated total testosterone (71 ng/dL, n,8-48ng/dL), free testosterone (8.4 pg/mL, n&amp;lt;4.2 pg/mL), 17- OH pregnenolone performed by liquid chromatography-tendem mass spectrometry (LC-MS/MS) was (429 ng/dL, n, 35-290 ng/dL luteal phase) and androstenedione LC-MS/MS (1941 ng/dL, n, 41-262 ng/dL) which confirmed NCCAH diagnosis due to 21OHD. She had no desire to become pregnant at the time of evaluation; however, was concern about fertility and genetics. Was started on OCPs and genetic testing was positive for V281L mutation in the CYP21A2 gene, being homozygous for this mutation. Three months after, her acne and frontal hair loss were better, and a trial of spironolactone 50 mg daily, was prescribed. For her sister and mother was suggested to consult endocrinology, due to possible same disease. Conclusion: this case highlights the importance of recognizing NCCAH as a cause of hyperandrogenism. Molecular genetic analysis should be offered with genetic counseling to patients, since they can carry a severe allele which can affect their progeny. Clinicians should be aware of the importance of family history when diagnosing NCCAH on their patients; for detection, treatment and genetic counseling of NCCAH on family members as well, as found in this case.

SAT-210 When Acne, Hirsutism and Menstrual Irregularities Are More Than PCOS