{"id":4422435,"date":"2025-01-11T18:41:33","date_gmt":"2025-01-12T00:41:33","guid":{"rendered":"https:\/\/myendoconsult.com\/learn\/topics\/precocious-puberty\/"},"modified":"2025-01-13T07:03:03","modified_gmt":"2025-01-13T13:03:03","slug":"precocious-puberty","status":"publish","type":"oen_topic","link":"https:\/\/myendoconsult.com\/learn\/topics\/precocious-puberty\/","title":{"rendered":"Precocious Puberty"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">PRECOCIOUS PUBERTY<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Definition<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Precocious puberty<\/strong> = onset of secondary sexual characteristics <strong>before age 8<\/strong> in girls or <strong>before age 9<\/strong> in boys.<\/li>\n\n\n\n<li>May be <strong>isosexual<\/strong> (appropriate for genetic sex) or <strong>contrasexual<\/strong> (virilization in girls, feminization in boys).<\/li>\n\n\n\n<li>Occurs <strong>10\u00d7 more often<\/strong> in girls (usually central\/true precocious puberty).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">GONADOTROPIN-DEPENDENT (CENTRAL) PRECOCIOUS PUBERTY<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">General<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Also called <strong>true<\/strong> precocious puberty.<\/li>\n\n\n\n<li>Caused by <strong>early maturation<\/strong> of the GnRH pulse generator \u2192 premature LH, FSH secretion.<\/li>\n\n\n\n<li>Accounts for ~20\u00d7 higher incidence in girls than in boys.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Clinical Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Girls: Premature thelarche (breast dev.) + pubarche in normal pubertal sequence, advanced <a href=\"https:\/\/myendoconsult.com\/learn\/bone-age-assessment\/\"  data-wpil-monitor-id=\"207\">bone age<\/a>, accelerated growth.<\/li>\n\n\n\n<li>Boys: Early testicular enlargement (gonadarche), plus pubic hair, advanced bone age, accelerated growth.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Etiologies<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Idiopathic<\/strong> (no identifiable CNS lesion):\n<ul class=\"wp-block-list\">\n<li>90% of central precocity in girls.<\/li>\n\n\n\n<li>50% of central precocity in boys (the other 50% have CNS lesion).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>CNS Causes<\/strong>:\n<ol class=\"wp-block-list\">\n<li><strong>Hamartomas<\/strong> of the tuber cinereum (ectopic GnRH pulse generator)<\/li>\n\n\n\n<li><strong>Astrocytoma<\/strong>, <strong>ependymoma<\/strong><\/li>\n\n\n\n<li><strong>Hypothalamic or optic gliomas<\/strong> (e.g., in NF1)<\/li>\n\n\n\n<li><strong>Craniopharyngioma<\/strong> or other tumors near the posterior hypothalamus<\/li>\n\n\n\n<li><strong>Radiation<\/strong> to CNS (e.g., for leukemia)<\/li>\n\n\n\n<li><strong>Hydrocephalus<\/strong>, CNS inflammatory disorders (e.g., sarcoid)<\/li>\n\n\n\n<li><strong>Pineal region neoplasms<\/strong> (e.g., germinoma)<\/li>\n\n\n\n<li><strong>Congenital midline defects<\/strong><\/li>\n<\/ol>\n<\/li>\n\n\n\n<li><strong>Rare<\/strong>: Gonadotropin-secreting pituitary tumors, or androgen exposure can secondarily activate GnRH pulses.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Laboratory Findings<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>LH, FSH, estradiol\/testosterone<\/strong>: Elevated, appropriate to pubertal levels.<\/li>\n\n\n\n<li><strong>Bone age<\/strong>: Advanced.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Imaging<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Head MRI<\/strong>: Indicated, especially in boys, or if suspicion of CNS lesion in girls.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Treatment<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If <strong>CNS lesion<\/strong>: Specific therapy (surgery, radiation, etc.).<\/li>\n\n\n\n<li><strong>Idiopathic<\/strong>: GnRH agonist therapy (e.g., leuprolide) to <strong>arrest early puberty<\/strong>, help attain better adult height.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">GONADOTROPIN-INDEPENDENT (PERIPHERAL) PRECOCIOUS PUBERTY<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">General<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Also called <strong>pseudoprecocious puberty<\/strong>.<\/li>\n\n\n\n<li><strong>Excess sex steroids<\/strong> (estrogens\/androgens) from gonadal or adrenal sources, <strong>independent<\/strong> of LH\/FSH.<\/li>\n\n\n\n<li>LH and FSH are <strong>suppressed<\/strong> due to negative feedback from high sex steroids.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Isosexual vs. Contrasexual<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Isosexual<\/strong>: External characteristics match genetic sex (e.g., girl with estrogen excess).<\/li>\n\n\n\n<li><strong>Contrasexual<\/strong>: Virilization of girls, feminization of boys.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Causes in Girls (Isosexual)<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Exogenous Estrogen<\/strong> (e.g., creams)<\/li>\n\n\n\n<li><strong>Ovarian Sources<\/strong>: Follicular cysts, granulosa-cell tumors, gonadoblastoma, Leydig cell tumors.<\/li>\n\n\n\n<li><strong>Adrenal Estrogen-Secreting Neoplasms<\/strong><\/li>\n\n\n\n<li><strong>McCune-Albright Syndrome<\/strong> (MAS)\n<ul class=\"wp-block-list\">\n<li><strong>GNAS<\/strong> somatic mutation \u2192 constitutive Gs protein \u2192 multiple endocrine hyperfunctions.<\/li>\n\n\n\n<li>Triad: <strong>Caf\u00e9-au-lait<\/strong> spots (coast-of-Maine), bony fibrous dysplasia, precocious puberty (often early vaginal bleeding &lt;2 yrs).<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Causes in Boys (Isosexual)<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Leydig Cell Tumors<\/strong> (testicular, usually benign)<\/li>\n\n\n\n<li><strong>hCG-Secreting Germ Cell Tumors<\/strong> (pineal, retroperitoneum, testes, etc.) \u2192 hCG mimics LH.<\/li>\n\n\n\n<li><strong>Adrenal Tumors<\/strong> producing androgens.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/myendoconsult.com\/learn\/topics\/congenital-adrenal-hyperplasia-cah\/\"  data-wpil-monitor-id=\"205\">Congenital Adrenal Hyperplasia<\/a><\/strong> (e.g., 21-hydroxylase deficiency, 11\u03b2-hydroxylase deficiency).<\/li>\n\n\n\n<li><strong>Testotoxicosis<\/strong>: Germline activating LH receptor mutation \u2192 early testosterone secretion.<\/li>\n\n\n\n<li><strong>McCune-Albright Syndrome<\/strong> (less common in boys).<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Contrasexual Precocity<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Girls<\/strong> with androgen excess: exogenous androgens, adrenal androgen-secreting tumors, CAH.<\/li>\n\n\n\n<li><strong>Boys<\/strong> with estrogen excess: exogenous estrogens, adrenal estrogen-secreting neoplasms.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Laboratory Findings<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>LH, FSH<\/strong>: Low (suppressed).<\/li>\n\n\n\n<li><strong>Sex steroids (E2, T)<\/strong>: Elevated.<\/li>\n\n\n\n<li><strong>Bone age<\/strong>: Advanced.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Treatment<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Address primary source<\/strong> of sex steroid (e.g., remove tumor, treat CAH with glucocorticoids).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">INCOMPLETE PRECOCIOUS PUBERTY<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Definition<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Premature thelarche<\/strong> or <strong>Premature adrenarche<\/strong> without full pubertal development.<\/li>\n\n\n\n<li>Often benign variants; bone age not advanced.<\/li>\n\n\n\n<li>May precede or evolve into full-blown central precocious puberty in a subset.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Other Causes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Untreated primary hypothyroidism<\/strong> can cause incomplete precocious puberty (rare).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">DIAGNOSTIC EVALUATION AND TREATMENT OF PRECOCIOUS PUBERTY<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Clinical Evaluation<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>History<\/strong>: Headaches, vision changes, polydipsia\/polyuria (suggest CNS lesion?), prior radiation or medications.<\/li>\n\n\n\n<li><strong>Growth Chart<\/strong>: Plot all heights over time.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/myendoconsult.com\/learn\/endocrine-reviews-reproductive-endocrinology\/tanner-staging\/\"  data-wpil-monitor-id=\"206\">Tanner Staging<\/a><\/strong>: Document breast\/genital\/pubic hair development.<\/li>\n\n\n\n<li><strong>Bone Age<\/strong>: Assess advanced skeletal maturation.<\/li>\n\n\n\n<li><strong>Lab Tests<\/strong>:\n<ul class=\"wp-block-list\">\n<li>LH, FSH, estradiol, testosterone, 17-hydroxyprogesterone, DHEA-S, androstenedione, TSH, \u00b1 \u03b2-hCG, \u03b1-fetoprotein.<\/li>\n\n\n\n<li>GnRH stimulation test (if needed) for central puberty diagnosis.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Imaging<\/strong>:\n<ul class=\"wp-block-list\">\n<li><strong>MRI (head)<\/strong> for central puberty.<\/li>\n\n\n\n<li><strong>Abdominal\/pelvic<\/strong> imaging for gonadal\/adrenal tumor suspicion.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Management<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Central (Gonadotropin-Dependent)<\/strong>\n<ul class=\"wp-block-list\">\n<li>If <strong>CNS lesion<\/strong>: Specific therapy (e.g., surgical resection of craniopharyngioma, radiation, etc.).<\/li>\n\n\n\n<li><strong>Idiopathic<\/strong>: GnRH agonists (leuprolide) to halt progression, preserve height.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Peripheral (Gonadotropin-Independent)<\/strong>\n<ul class=\"wp-block-list\">\n<li>Treat underlying source (e.g., resect androgen-secreting tumor, glucocorticoids for CAH).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>PRECOCIOUS PUBERTY Definition GONADOTROPIN-DEPENDENT (CENTRAL) PRECOCIOUS PUBERTY General Clinical Features Etiologies Laboratory Findings Imaging Treatment GONADOTROPIN-INDEPENDENT (PERIPHERAL) PRECOCIOUS PUBERTY General Isosexual vs. Contrasexual Causes in Girls (Isosexual) Causes in Boys (Isosexual) Contrasexual Precocity Laboratory Findings Treatment INCOMPLETE PRECOCIOUS PUBERTY Definition Other Causes DIAGNOSTIC EVALUATION AND TREATMENT OF PRECOCIOUS PUBERTY Clinical Evaluation Management<\/p>\n","protected":false},"featured_media":0,"template":"","oen_topic_chapter":[685],"class_list":["post-4422435","oen_topic","type-oen_topic","status-publish","hentry","oen_topic_chapter-reproductive-disorders","post-wrapper","thrv_wrapper"],"_links":{"self":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic\/4422435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic"}],"about":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/types\/oen_topic"}],"version-history":[{"count":3,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic\/4422435\/revisions"}],"predecessor-version":[{"id":4422438,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic\/4422435\/revisions\/4422438"}],"wp:attachment":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/media?parent=4422435"}],"wp:term":[{"taxonomy":"oen_topic_chapter","embeddable":true,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic_chapter?post=4422435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}