{"id":4422466,"date":"2025-01-11T20:14:48","date_gmt":"2025-01-12T02:14:48","guid":{"rendered":"https:\/\/myendoconsult.com\/learn\/topics\/galactorrhea\/"},"modified":"2025-01-19T20:28:42","modified_gmt":"2025-01-20T02:28:42","slug":"galactorrhea","status":"publish","type":"oen_topic","link":"https:\/\/myendoconsult.com\/learn\/topics\/galactorrhea\/","title":{"rendered":"Galactorrhea"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">GALACTORRHEA<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Definition and Presentation<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Galactorrhea<\/strong> = Inappropriate milky discharge from breasts (in a woman not postpartum or &gt;6 months after childbirth, not breastfeeding).<\/li>\n\n\n\n<li>Usually <strong>bilateral<\/strong>, spontaneous or expressible; may be <strong>unilateral<\/strong> but less common.<\/li>\n\n\n\n<li><strong>Rare<\/strong> in men.<\/li>\n\n\n\n<li>Often traces back to postpartum lactation that never fully ceased.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Normal Physiology of Lactation<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Hormonal Requirements<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Prolactin<\/strong> (anterior pituitary)<\/li>\n\n\n\n<li><strong>Estrogen &amp; Progesterone<\/strong> (ovaries) for duct\/lobule development.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"3600\" height=\"2100\" src=\"https:\/\/myendoconsult.com\/learn\/wp-content\/uploads\/The-hypothalamo-hypophyso-prolactin-axis.png\" alt=\"\" class=\"wp-image-4422890\" srcset=\"https:\/\/myendoconsult.com\/learn\/wp-content\/uploads\/The-hypothalamo-hypophyso-prolactin-axis.png 3600w, https:\/\/myendoconsult.com\/learn\/wp-content\/uploads\/The-hypothalamo-hypophyso-prolactin-axis-300x175.png 300w, https:\/\/myendoconsult.com\/learn\/wp-content\/uploads\/The-hypothalamo-hypophyso-prolactin-axis-768x448.png 768w, https:\/\/myendoconsult.com\/learn\/wp-content\/uploads\/The-hypothalamo-hypophyso-prolactin-axis-1536x896.png 1536w, https:\/\/myendoconsult.com\/learn\/wp-content\/uploads\/The-hypothalamo-hypophyso-prolactin-axis-2048x1195.png 2048w\" sizes=\"auto, (max-width: 3600px) 100vw, 3600px\" \/><figcaption class=\"wp-element-caption\">The hypothalamic pituitary gonadal axis<\/figcaption><\/figure>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Pregnancy-Related Changes<\/strong>\n<ul class=\"wp-block-list\">\n<li>Blood <strong>prolactin<\/strong> progressively increases, peaking at delivery (~10\u00d7 normal upper limit).<\/li>\n\n\n\n<li>Rising <strong>estrogens<\/strong> stimulate prolactin secretion (pituitary lactotroph stimulation).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Suckling Action<\/strong>\n<ul class=\"wp-block-list\">\n<li>Stimulates <strong>prolactin<\/strong> release (milk production) and <strong>oxytocin<\/strong> release (myoepithelial contraction \u2192 milk let-down).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Dopamine Inhibition<\/strong>\n<ul class=\"wp-block-list\">\n<li>Dopamine (prolactin-inhibiting factor) from <a href=\"https:\/\/myendoconsult.com\/learn\/anatomy-of-the-hypothalamus-and-pituitary-gland\/\" data-wpil-monitor-id=\"221\">hypothalamus \u2192 pituitary<\/a> lactotrophs \u2192 suppresses prolactin secretion.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Galactorrhea and Prolactinomas : Concise Review\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/fTq8hg4JEnU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">CAUSES OF GALACTORRHEA<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Hyperprolactinemia-Related<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Common Pathway<\/strong>: Excess prolactin often \u2192 galactorrhea.<\/li>\n\n\n\n<li><strong>Hypothalamic\/Pituitary Stalk Lesions or Macroadenomas<\/strong>\n<ul class=\"wp-block-list\">\n<li>Interfere with dopamine transmission \u2192 <strong>loss of prolactin inhibition<\/strong> \u2192 elevated prolactin.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Prolactinoma<\/strong> (pituitary tumor secreting prolactin)\n<ul class=\"wp-block-list\">\n<li>Often presents with galactorrhea, amenorrhea.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Dopamine Antagonists<\/strong> (psychiatric or GI drugs)\n<ul class=\"wp-block-list\">\n<li>e.g., <strong>risperidone, phenothiazines, metoclopramide<\/strong> \u2192 block dopamine effects \u2192 \u2191 prolactin.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/myendoconsult.com\/learn\/primary-vs-secondary-hypothyroidism\/\" data-wpil-monitor-id=\"222\">Primary Hypothyroidism<\/a><\/strong>\n<ul class=\"wp-block-list\">\n<li>\u2191 TRH \u2192 stimulates pituitary lactotrophs \u2192 hyperprolactinemia.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Chronic Renal Failure<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u2191 prolactin secretion + decreased clearance.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Nipple\/Chest Wall Stimulation or Lesions<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chronic Nipple Stimulation<\/strong> (e.g., mechanical, frequent self-exam).<\/li>\n\n\n\n<li><strong>Chest Wall Injuries<\/strong> or surgeries, <strong>thoracotomy<\/strong>, <strong>herpes zoster<\/strong> on chest.<\/li>\n\n\n\n<li><strong>Spinal cord lesions<\/strong> (cervical region).<\/li>\n\n\n\n<li>Mechanism: Mimics suckling \u2192 triggers reflex prolactin release.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. GH Excess (Acromegaly)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>~50% of women with <strong>acromegaly<\/strong> have galactorrhea (GH has lactogenic activity) \u2192 can occur even without hyperprolactinemia.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. End-Organ Breast Hypersensitivity<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Most common single cause<\/strong> (~50% of galactorrhea cases).<\/li>\n\n\n\n<li>Normal serum prolactin; regular menses.<\/li>\n\n\n\n<li>Often <strong>postpartum<\/strong>: lactation fails to stop completely even when menses resume.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5. Other Rare Situations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Usually mild or minimal contribution unless hyperprolactinemia present.<\/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\">TREATMENT AND MANAGEMENT<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Address Underlying Hyperprolactinemia<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Dopamine agonists<\/strong> (bromocriptine, cabergoline) for prolactinomas \u2192 normalize prolactin, resolve galactorrhea.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>When <a href=\"https:\/\/myendoconsult.com\/learn\/topics\/nonfunctioning-pituitary-adenoma\/\" data-wpil-monitor-id=\"219\">Pituitary Tumors Are Nonfunctioning<\/a><\/strong>\n<ul class=\"wp-block-list\">\n<li>Dopamine agonists reduce prolactin (stalk effect) but do not treat tumor mass; surgical\/other interventions may be necessary.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Medication-Related<\/strong>\n<ul class=\"wp-block-list\">\n<li>If a <a href=\"https:\/\/myendoconsult.com\/learn\/drugs-causing-hyperprolactinemia-mnemonic\/\" data-wpil-monitor-id=\"220\">drug induces hyperprolactinemia<\/a>, consider alternative therapy.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Nonhyperprolactinemic (Idiopathic) Galactorrhea<\/strong>\n<ul class=\"wp-block-list\">\n<li>Usually benign; reassurance \u00b1 supportive measures as needed.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><a href=\"https:\/\/myendoconsult.com\/learn\/download\/prolactinoma-lecture-slides\/\" data-type=\"link\" data-id=\"https:\/\/myendoconsult.com\/learn\/download\/prolactinoma-lecture-slides\/\">Download Lecture Slides for Hyperprolactinemia\/Prolactinoma<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>GALACTORRHEA Definition and Presentation Normal Physiology of Lactation CAUSES OF GALACTORRHEA 1. Hyperprolactinemia-Related 2. Nipple\/Chest Wall Stimulation or Lesions 3. GH Excess (Acromegaly) 4. End-Organ Breast Hypersensitivity 5. Other Rare Situations TREATMENT AND MANAGEMENT Download Lecture Slides for Hyperprolactinemia\/Prolactinoma<\/p>\n","protected":false},"featured_media":0,"template":"","oen_topic_chapter":[685],"class_list":["post-4422466","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\/4422466","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":8,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic\/4422466\/revisions"}],"predecessor-version":[{"id":4422895,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic\/4422466\/revisions\/4422895"}],"wp:attachment":[{"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/media?parent=4422466"}],"wp:term":[{"taxonomy":"oen_topic_chapter","embeddable":true,"href":"https:\/\/myendoconsult.com\/learn\/wp-json\/wp\/v2\/oen_topic_chapter?post=4422466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}