{"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&hellip;<\/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"],"_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}]}}