Uterine fibroids
Uterine leiomyomas are benign monoclonal smooth-muscle tumors of the myometrium that cause heavy menstrual bleeding, bulk symptoms, and reproductive dysfunction; management ranges from expectant care to hormonal bleeding control to fertility-sparing or definitive surgery.
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What this article covers
- Overview
Benign monoclonal smooth-muscle tumor: uterine leiomyomas (fibroids or myomas) arise from myometrial smooth muscle and are the most common benign neoplasm of the female genital tract, presenting as…
- Epidemiology
Very common, age-related: fibroids occur in 50% to 80% of women, most prevalent during the reproductive years, typically regressing after menopause.
- Risk factors
Reproductive age: the peak incidence window; risk falls sharply after menopause.
- Pathophysiology
Monoclonal smooth-muscle proliferation: each fibroid arises from a single myometrial smooth-muscle cell with a somatic mutation, proliferating clonally, so one uterus can carry multiple genetically distinct tumors.
- Clinical features
Majority asymptomatic: most fibroids are incidental findings on exam or imaging for another reason.
- Differential diagnosis
Adenomyosis: cyclic but heavy, prolonged menses with severe cramping and dyspareunia; uterus is uniformly, symmetrically enlarged, globular, and boggy rather than irregular and nodular, with…
- Diagnosis
Confirmatory basis, exam first then confirmed by imaging: an enlarged, irregular, firm, nontender uterus on bimanual exam suggests fibroids; the diagnosis is confirmed by transvaginal ultrasound…
- Management
First, if fibroids are asymptomatic, treat with expectant observation only: annual pelvic examination and CBC as clinically indicated; routine surveillance imaging is not required.
- Complications
Iron deficiency anemia: the most common clinically significant complication, from chronic heavy blood loss; confirm with CBC and iron studies and treat with oral iron replacement as above.
- Prognosis
Favorable overall course: most fibroids remain asymptomatic or minimally symptomatic and regress after menopause; most women require no intervention.
- Prevention
No proven primary prevention: no screening test or intervention prevents fibroid formation; efforts focus on early symptom recognition and modifiable risk-factor reduction.
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Related articles
- Adenomyosis
Adenomyosis is the presence of endometrial glands and stroma within the myometrium, producing a diffusely enlarged, boggy, symmetric uterus with heavy menstrual bleeding and severe dysmenorrhea; it is a pathologic diagnosis, supported clinically by exam and ultrasound or MRI, and definitively treated with hysterectomy.
- Evaluation of abnormal uterine bleeding
Abnormal uterine bleeding is any deviation from normal menstrual volume, duration, frequency, or regularity, classified by the PALM-COEIN system into structural and nonstructural causes. Pregnancy is excluded first with beta-hCG, postmenopausal bleeding gets an endometrial biopsy, and acute heavy bleeding is treated first-line with high-dose IV conjugated estrogen.
- Endometrial polyp
Endometrial polyps are focal, usually benign, estrogen-sensitive overgrowths of endometrial glands and stroma projecting into the uterine cavity that present with abnormal or intermenstrual bleeding; diagnosis is by saline-infusion sonohysterography or hysteroscopy, and treatment is hysteroscopic polypectomy with pathology, which is both diagnostic and curative.
- Endometrial cancer
Endometrial cancer is the most common gynecologic malignancy, most often a type I endometrioid adenocarcinoma driven by unopposed estrogen and heralded by postmenopausal bleeding. Any postmenopausal bleeding or thickened endometrial stripe prompts endometrial biopsy, and early-stage disease is treated with total hysterectomy and bilateral salpingo-oophorectomy, giving a favorable overall prognosis.
- Endometriosis
Endometrial-like glands and stroma implanted outside the uterus drive cyclic pelvic pain, dyspareunia, dyschezia, and infertility. Diagnosis is presumed clinically and confirmed by laparoscopic visualization with biopsy; treatment is staged from NSAIDs and hormonal suppression through conservative or definitive surgery.
- Ectopic pregnancy
A fertilized ovum implants outside the endometrial cavity, almost always in the fallopian tube, and is the leading cause of maternal death in the first trimester. Diagnosis rests on quantitative beta-hCG paired with transvaginal ultrasound, and management branches immediately on hemodynamic stability.
- Pelvic inflammatory disease
Pelvic inflammatory disease is an ascending polymicrobial infection of the upper female genital tract, most often caused by Neisseria gonorrhoeae, Chlamydia trachomatis, or Mycoplasma genitalium, diagnosed clinically on uterine, adnexal, or cervical motion tenderness. Most women are treated as outpatients with a single dose of ceftriaxone plus 14 days of doxycycline, while parenteral cefotetan or cefoxitin plus doxycycline, or clindamycin plus gentamicin, is reserved for hospitalized patients, with tubo-ovarian abscess and infertility among the major complications of delayed treatment.
- Von Willebrand disease
Von Willebrand disease is the most common inherited bleeding disorder, caused by deficient or dysfunctional von Willebrand factor, producing mucocutaneous bleeding from impaired platelet adhesion plus a mild secondary factor VIII deficiency. Diagnosis rests on the vWF antigen, ristocetin cofactor activity, and factor VIII activity panel, and management centers on desmopressin for type 1, vWF concentrate for severe or desmopressin-unresponsive disease, and antifibrinolytics for mucosal bleeding.
- Hypothyroidism
Hypothyroidism is thyroid hormone deficiency, most commonly caused by autoimmune (Hashimoto) thyroid failure in iodine-sufficient countries, diagnosed by an elevated thyroid-stimulating hormone with a low or normal free thyroxine. First-line treatment is levothyroxine dosed at 1.6 mcg/kg lean body weight orally once daily, titrated using thyroid-stimulating hormone rechecked no sooner than 6 weeks after any dose change.
- Menopause
Menopause is the permanent cessation of menses from ovarian follicular depletion, confirmed retrospectively after 12 months of amenorrhea around a mean age of 51 years. Management centers on treating moderate to severe vasomotor symptoms with the lowest effective dose of hormone therapy in appropriately selected candidates, alongside bone and cardiovascular risk assessment.
- Infertility
Infertility is failure to conceive after 12 months of regular, unprotected intercourse (6 months if the woman is 35 or older), most often from ovulatory dysfunction, male factor, or tubal or pelvic disease. Diagnosis rests on midluteal progesterone, semen analysis, and hysterosalpingography in both partners concurrently. First-line treatment for anovulatory infertility is ovulation induction with letrozole or clomiphene citrate, escalating to intrauterine insemination or in vitro fertilization when indicated.