Familial male-limited precocious puberty

Familial male-limited precocious puberty, often abbreviated as FMPP, also known as familial sexual precocity or gonadotropin-independent testotoxicosis,^[1] is a form of gonadotropin-independent precocious puberty in which boys experience early onset and progression of puberty.^[2] Signs of puberty can develop as early as an age of 1 year.^{[citation needed]}

Familial male-limited precocious puberty
Other names	Familial sexual precocity
Male-limited precocious puberty has an autosomal dominant pattern of inheritance. However, only males are affected; females with the mutant gene are not affected.
Specialty	Endocrinology

The spinal length in boys may be short due to a rapid advance in epiphyseal maturation. It is an autosomal dominant^[1] condition with a mutation of the luteinizing hormone (LH) receptor. As FMPP is a gonadotropin-independent form of precocious puberty, gonadotropin-releasing hormone agonists (GnRH agonists) are ineffective. Treatment is with drugs that suppress or block the effects of gonadal steroidogenesis, such as cyproterone acetate, ketoconazole, spironolactone, and testolactone.^[3] Alternatively, the combination of the androgen receptor antagonist bicalutamide and the aromatase inhibitor anastrozole may be used.^[4]

Robert King Stone, personal physician to American president Abraham Lincoln, described the first case of FMPP in 1852.^[5]

See also

• Follicle-stimulating hormone insensitivity
• Gonadotropin-releasing hormone insensitivity
• Hypergonadism, hyperandrogenism, and precocious puberty
• Inborn errors of steroid metabolism
• Leydig cell hypoplasia (or LH insensitivity)