A concerned mother has brought her 8-year old girl to the gynecology clinic because of enlarged breasts. Her daughter has been feeling depressed as her schoolmates make fun of her for her large breasts. There has no axillary or pubic hair. There is no history of menarche. Her voice did not change. Her examination is completely normal.
What is the most likely diagnosis?
A-Precocious puberty
B-Isolated premature thelarche
C-Pituitary adenoma
D-Androgen insensitivity syndrome
E-Congenital adrenal hyperplasia