Case Report

A Case of Familial Male-Limited Precocious Puberty with a Novel Mutation

10.4274/jcrpe.galenos.2020.2020.0067

  • Shilpa Gurnurkar
  • Emily DiLillo
  • Mauri Carakushansky

Received Date: 02.04.2020 Accepted Date: 07.07.2020 J Clin Res Pediatr Endocrinol 0;0(0):0-0 [e-Pub] PMID: 32757547

Familial Male-Limited Precocious Puberty (FMPP), also known as testotoxicosis, is a rare cause of precocious puberty in males. It is caused by a mutation in the luteinizing hormone/chorionic gonadotropin receptor (LHCGR) gene, resulting in the receptor to be constitutively activated. This causes excessive production of testosterone, leading to precocious puberty in males. Generally, boys present with signs of puberty, such as pubic hair growth, acne, and increased height velocity around the age of 2-4 years old. Like any other cause of precocious puberty, the goal of treatment is to prevent virilization and also delay closure of the epiphyseal plates to maintain adult height potential. Treatment therefore is aimed at decreasing the effects of testosterone, as well as stop the conversion of testosterone to estrogen. Because the disorder is so rare, little is known about the long-term effects of treatment; however, studies using bicalutamide and anastrozole have been promising. In this report, we present a case of FMPP with a novel mutation in the LHCGR gene, who has been responding well to therapy using both drugs.

Keywords: Familial male limited precocious puberty, bone age, short stature, adult height