ESTROGEN-ONLY–PRODUCING ADRENAL MASS AS AN OVERLOOKED ETIOLOGY OF ISOSEXUAL PRECOCIOUS PUBERTY IN GIRLS: A CASE REPORT AND LITERATURE REVIEW

ABSTRACT Objective: An estrogen-only–producing adrenal tumor is a rare etiology of isosexual precocious puberty (PP) in girls. Methods: We describe a 2.5-year-old girl who presented with signs and symptoms of isosexual PP. In primary laboratory and imaging investigations, serum estradiol level was found to be increased, while follicle-stimulating hormone, luteinizing hormone, adrenocorticotropic hormone, cortisol, testosterone, and 17-hydroxyprogesterone levels were shown to be within normal ranges. Abdominopelvic ultrasound and abdominal computed tomography revealed a right-sided adrenal mass, which was initially assumed to be an incidentaloma. Diagnosis of an adrenal cortical tumor was confirmed by tumor resection. Histologic examination revealed the tumor to be a benign adenoma with scattered areas of necrosis. Results: Tumor resection resulted in normalized serum estradiol and diminished clinical signs after 3 weeks. The child received no additional treatment and remains symptom free after 30 months o...