Uterine fibroids are benign tumors unique to women, affecting approximately one in four to five women over the age of 35. While diagnosis and treatment have become increasingly sophisticated, 5% to 8% of patients experience atypical symptoms and are misdiagnosed with other conditions, allowing uterine fibroids to remain undetected.
Main Symptoms of Uterine Fibroids
Early-stage uterine fibroids often show no obvious symptoms; clinical manifestations only appear once the tumors grow to a certain size. The endometrium near fibroids is rich in blood vessels, leading to menorrhagia and prolonged menstrual periods during menstruation.
As fibroids enlarge, they cause pressure-related symptoms:
- Compression of the bladder results in frequent and urgent urination.
- Compression of the urethra may cause urinary retention or difficulty urinating.
- Compression of the rectum leads to difficult defecation.
- Compression of the ureter can cause ureteral obstruction, hydronephrosis, and upper ureteral dilatation.
Pedunculated subserosal fibroids may twist and cause acute abdominal cramps. Submucosal fibroids protruding into the vaginal cavity through the cervical canal can trigger lower abdominal pain, while intramural fibroids may induce or worsen dysmenorrhea.
As a space-occupying lesion in the uterus, fibroids often interfere with blastocyst implantation, impede sperm migration, disrupt normal embryonic development, and increase the risk of infertility or miscarriage.
Conditions Easily Confused with Uterine Fibroids
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Dysfunctional Uterine Bleeding Submucosal fibroids frequently mimic dysfunctional uterine bleeding during menstruation. These fibroids are prone to necrosis and infection, and antibiotic therapy only provides temporary relief.
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Ovarian Tumors Ovarian tumors are often misdiagnosed as uterine fibroids. Most ovarian tumors are cystic; solid ovarian tumors carry a high risk of malignancy. Unlike fibroids, ovarian tumors rarely cause menstrual abnormalities unless ovarian function is severely impaired.
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Chronic Pelvic Inflammatory Disease Chronic inflammation can form pelvic masses with symptoms such as pressure, dysmenorrhea, and menstrual irregularities similar to fibroids. However, inflammatory conditions present prodromal signs including a history of infection, fever, and elevated white blood cell count, and respond rapidly to antibiotic treatment.
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Uterine Hypertrophy Uterine hypertrophy shares similar symptoms with fibroids, and menstrual flow alone cannot distinguish the two. On gynecological examination, uterine hypertrophy lacks the nodular texture characteristic of fibroids, with no significant pressure symptoms or urinary/bowel abnormalities. Ultrasound can reliably differentiate the two conditions.
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Endometrial Polyps Endometrial polyps may cause uterine enlargement and menstrual changes, but they are soft, generally small in size, and do not affect bowel or bladder function or cause hydronephrosis. They also do not induce dysmenorrhea.
Other conditions including hydatidiform mole and ectopic pregnancy with pelvic hematoma may also be difficult to distinguish from uterine fibroids.
Key Minimally Invasive Treatment: Focused Ultrasound Ablation
For patients misdiagnosed or confirmed with uterine fibroids, Focused Ultrasound Ablation (FUSA) has emerged as a leading non-invasive therapeutic option, especially suitable for cases where misdiagnosis delayed appropriate intervention.
Focused ultrasound ablation works by precisely concentrating high-intensity ultrasound energy into the fibroid tissue, generating localized thermal ablation that induces coagulative necrosis and shrinkage of fibroids without damaging surrounding healthy tissue. This procedure is non-surgical, incision-free, and preserves the uterus completely, making it ideal for women seeking fertility preservation.
Compared with traditional treatments, focused ultrasound ablation offers shorter recovery times, no anesthesia risks in many cases, and rapid relief of heavy menstrual bleeding, pelvic pressure, and pain. It is particularly recommended for patients with atypical symptoms who were previously misdiagnosed, as it provides a safe, effective, and minimally invasive solution once the correct diagnosis is established.
Measures to Prevent Misdiagnosis
Each disease has distinct clinical features. Women presenting with abnormal menstruation, uterine enlargement, abdominal pain, infertility, or pressure symptoms should seek immediate medical evaluation. Comprehensive imaging, especially ultrasound and MRI, combined with clinical history, helps avoid misdiagnosis and ensures timely treatment.