
Fibroid Uterus — FIGO Classification & Treatment
Fibroids are benign smooth-muscle tumours of the uterus, and the commonest solid pelvic tumour in women; at least 70% of women develop them by late reproductive age
Many cause no symptoms and need no treatment
When they do cause symptoms: heavy or prolonged periods and anaemia, and bulk symptoms such as pelvic pressure, frequent urination and constipation
Treatment depends on symptoms, size and position of the fibroids, and whether she wants to keep her fertility and her uterus
Medicines control bleeding but do not remove large fibroids; surgery or embolisation is needed for bulk
| Type | Position | Description |
|---|---|---|
| 0 | Submucosal: pedunculated intracavitary | Attached by a stalk and lying inside the cavity |
| 1 | Submucosal: less than 50% intramural | Mostly in the cavity; less than half is inside the muscle |
| 2 | Submucosal: 50% or more intramural | Mostly in the muscle wall, but touching the endometrium |
| 3 | Contacts the endometrium, 100% intramural | Entirely in the muscle, touching the endometrium; does not distort the cavity |
| 4 | Intramural | Entirely in the muscle, away from both the endometrium and the outer surface |
| 5 | Subserosal: 50% or more intramural | Mostly in the muscle, reaching the outer surface |
| 6 | Subserosal: less than 50% intramural | Mostly outside the muscle, less than half inside |
| 7 | Subserosal: pedunculated | Attached by a stalk to the outer surface |
| 8 | Other | Elsewhere, for example the cervix or a parasitic fibroid; state the site |
Types 0, 1 and 2 can usually be removed through the hysteroscope (hysteroscopic myomectomy is highly effective for these types)
Submucosal fibroids (0–3) are the ones that most often cause heavy bleeding and affect fertility
Type 3 does not distort the cavity but touches the lining; it may still cause bleeding
Types 4–7 give bulk symptoms and need laparoscopic or open surgery, or embolisation, when treatment is required
Type 7 can twist, and type 8 (cervical or parasitic) needs a specialist plan
Write the type in the notes and the scan report so the whole team plans the same operation
Fibroids are classified by position: submucosal (inside the cavity), intramural (in the muscle) and subserosal (on the outer surface); the FIGO types 0 to 8 are shown above
Submucosal fibroids cause the most bleeding and affect fertility most
Heavy menstrual bleeding and anaemia: tiredness, breathlessness and pallor are the main complaints
Bulk symptoms: pelvic pressure or heaviness, frequent urination, constipation, and a lump felt in the lower abdomen
Other effects: pain, pain with sex, and sometimes infertility or pregnancy complications
Women of African descent develop clinically significant fibroids earlier, with larger uteri
Examination: a firm, irregular, enlarged uterus, usually non-tender
Pelvic ultrasound (transvaginal and abdominal) shows size, number and position; use MRI when more detail is needed, for example before embolisation or myomectomy
Hysteroscopy for submucosal fibroids, and when the cavity needs to be seen
Full blood count and ferritin to look for anaemia and iron deficiency
Pregnancy test, and endometrial sampling if she is over 45 or has risk factors for hyperplasia (from memory)
| Option | Dose and use | Points to remember |
|---|---|---|
| Tranexamic acid | 1.3 g three times a day, at least 6 hours apart, for up to 5 days a cycle, started when heavy bleeding begins (trial dose, maximum 3.9 g a day) | Non-hormonal; reduces bleeding but not size. Avoid with a history of thrombosis (last point |
| NSAIDs | Taken during the period | Help pain; can be offered while investigations or treatment are arranged |
| LNG-IUS 52 mg | One device, up to 5 years (duration | Treats the bleeding; expulsion is more frequent with fibroids, and it may not suit a distorted cavity |
| Combined hormonal contraceptives or progestogens | As for heavy menstrual bleeding | May help bleeding; evidence is limited |
| Oral GnRH antagonist with add-back (relugolix 40 mg, estradiol 1 mg, norethindrone acetate 0.5 mg once daily; elagolix combination also exists) | Up to 24 months (FDA limit) | Reduce bleeding and may shrink fibroids; bone loss risk, hence the limit. Availability varies by country |
| GnRH agonist (for example leuprolide) | Short-term, up to 6 months without add-back, or 12 months with add-back (oestrogen with norethindrone) | Shrinks fibroids and raises haemoglobin before surgery; fibroids regrow within 6–9 months of stopping; menopausal side effects |
| Ulipristal acetate (and mifepristone) | Short courses only where available | Not approved for daily use in the USA; use limited in Europe because of rare serious liver injury |
| Option | For whom | Points to remember |
|---|---|---|
| Hysteroscopic myomectomy | Submucosal fibroids (types 0, 1 and 2) | Highly effective; complications 1–3%; re-intervention about 7% at 60 months |
| Myomectomy (laparoscopic, robotic or open) | Wants to keep the uterus or conceive | Recommended when future pregnancy is wanted; recurrence about 25% by 40 months; transfusion risk 0–5% |
| Uterine artery embolisation | Wants to keep the uterus and is not planning pregnancy | Similar satisfaction at 2–5 years; more repeat procedures (15–38%); little data on later pregnancy |
| Radiofrequency ablation | Uterus-sparing, where available | Shrinks fibroids by 50–75%; access is limited; little pregnancy data |
| Hysterectomy | Family complete or other treatment failed or declined | Definitive; use the least invasive route, with vaginal preferred where possible |
Most women with fibroids conceive and deliver normally (from memory)
Submucosal fibroids lower the chance of pregnancy and raise the risk of miscarriage; removal by hysteroscopy is advised when she is trying to conceive (from memory)
If she wants a pregnancy and the uterus kept, myomectomy is recommended, ideally minimally invasive
Fibroids in pregnancy can cause pain (red degeneration), malpresentation, and bleeding after birth; the obstetric team should plan the delivery (from memory)
Medicines that suppress ovulation are not used when she is trying to conceive
Treating asymptomatic fibroids because they look large on a scan
Missing anaemia and not giving iron
Offering hormonal treatment when she is trying to conceive
Using a GnRH agonist for months without add-back and without a plan for the next step
Choosing embolisation for a woman who wants a pregnancy
Morcellating a uterus without excluding a sarcoma (from memory)
Ignoring a fast-growing fibroid



