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Puberty Menorrhagia — Detailed MBBS Answer (15 Marks)

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Definition

• Blood loss >80 mL per menstrual cycle, or
• Duration >7 days, occurring at regular intervals

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Epidemiology

• Abnormal vaginal bleeding affects 10–30% of women of reproductive age
• Heavy menstrual bleeding is very common in adolescents, as most early post-menarchal cycles are anovulatory
• Menstrual cycles remain anovulatory for an average of 18 months after menarche while the hypothalamic-pituitary-ovarian (HPO) axis matures
• Up to 20–24% of adolescents with menorrhagia may have an undiagnosed coagulation disorder
• Primary coagulation disorders account for up to 20% of acute uterine bleeding in adolescents

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Etiology and Pathophysiology

Primary Cause — Anovulation (Most Common)

1. At menarche, the hypothalamus and pituitary have not yet developed mature positive feedback to rising estrogen levels
2. The midcycle LH surge fails to occur → no ovulation → no corpus luteum formation
3. Without a corpus luteum, progesterone is not produced
4. Unopposed estrogen continues to stimulate endometrial proliferation
5. The thickened, fragile endometrium outgrows its blood supply, sheds irregularly, and bleeds heavily — estrogen breakthrough bleeding
6. Without progesterone-induced prostaglandin F2α (which causes vasospasm and hemostasis), bleeding is prolonged

PALM-COEIN Classification (FIGO 2011)

Causes Specific to Puberty Menorrhagia

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Clinical Features

History

• Heavy menstrual flow — soaking >1 pad/tampon per hour for several consecutive hours (each pad absorbs ~20–30 mL)
• Passage of blood clots (indicates rapid blood loss exceeding the fibrinolytic capacity)
• Prolonged bleeding duration (>7 days)
• Fatigue, pallor, breathlessness → symptoms of iron-deficiency anemia
• Onset near/around menarche
• Family history of bleeding disorders (screen for von Willebrand disease if: heavy bleeding since menarche, plus two of: bruising monthly, epistaxis monthly, frequent gum bleeding)
• History of postpartum hemorrhage or surgical/dental bleeding in family members
• Drug history: anticoagulants, SSRIs, herbal supplements (ginseng)

Symptoms to Elicit (Underlying Causes)

• Weight gain, cold intolerance, constipation → hypothyroidism
• Galactorrhea → hyperprolactinemia
• Hirsutism, obesity → PCOS
• Petechiae, purpura, mucosal bleeding → hematologic disorder

Physical Examination

1. General: Pallor, tachycardia, hypotension (assess hemodynamic stability first)
2. BMI: Obesity suggests PCOS
3. Skin: Hirsutism (PCOS), petechiae/purpura (coagulopathy), acne
4. Thyroid: Goiter (hypothyroidism)
5. Galactorrhea: Squeeze for nipple discharge
6. Pelvic examination (with chaperone):
   • Inspect vulva, perineum, urethra, perianal region
   • Speculum: visualize cervix and vaginal canal
   • Bimanual: uterine size, adnexal masses, tenderness
   • Note: In adolescents who are not sexually active, rectal exam may substitute bimanual exam

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Investigations

Step 1 — Immediate (All Cases)

Step 2 — Hormonal and Metabolic

Step 3 — Imaging

Step 4 — If Indicated

• Endometrial biopsy: In adolescents generally NOT required unless persistent AUB unresponsive to treatment; reserved for women >45 or those with risk factors for hyperplasia
• Hysteroscopy: For structural lesions
• Bone marrow biopsy: If myeloproliferative disorder suspected

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Diagnosis

• Heavy menstrual bleeding near menarche
• Regular/irregular cycles (anovulatory cycles are often irregular)
• Exclusion of pregnancy, structural causes, coagulopathy
• Most cases = anovulatory AUB (HPO axis immaturity)

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Differential Diagnosis

1. Pregnancy complications (threatened/inevitable abortion, ectopic)
2. Coagulation disorders (vWD, ITP)
3. Hypothyroidism
4. PCOS
5. Pelvic infection / endometritis
6. Cervical or vaginal trauma/foreign body
7. Structural lesions (polyp, fibroid — rare at this age)

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Management

A. General Measures

• Reassurance — explain the physiologic basis (HPO immaturity)
• Correct iron deficiency anemia: oral ferrous sulfate 200 mg TDS
• Monitor hemoglobin; transfuse if Hb <7 g/dL or hemodynamically unstable

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B. Medical Management

1. Non-hormonal (for mild–moderate bleeding)

2. Hormonal Management (Mainstay in Adolescents)

Note: High-dose IV estrogen in acute profuse bleeding followed by COCP for maintenance is the classic "stop the bleed" regimen in adolescents.

3. Management of Specific Causes

• Hypothyroidism → Levothyroxine (bleeding resolves with thyroid correction)
• vWD → DDAVP (desmopressin) or vWF concentrate; tranexamic acid adjunct
• ITP → Corticosteroids, IV immunoglobulin, platelet transfusion if critical
• PCOS → COCP + lifestyle modification; metformin

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C. Surgical Management

D&C alone is NOT recommended as a sole treatment as it does not provide long-term control.

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D. Management Algorithm Summary

Puberty Menorrhagia
       │
       ├── Hemodynamically UNSTABLE
       │        ├── IV access, resuscitation
       │        ├── High-dose IV conjugated estrogen OR
       │        │   IV tranexamic acid 1–1.3 g
       │        ├── High-dose COCP to stabilize
       │        └── Hematology/GYN consult; D&C if needed
       │
       └── Hemodynamically STABLE
                ├── Exclude pregnancy (βhCG)
                ├── Investigations: CBC, coagulation, TSH, vWD screen
                ├── Iron supplementation
                ├── Mild → NSAIDs + tranexamic acid
                ├── Moderate → Cyclic progestin or COCP
                └── Treat underlying cause

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Complications

1. Iron-deficiency anemia — most common complication
2. Hypovolemic shock — in severe acute hemorrhage
3. Psychological impact — school absence, social embarrassment, anxiety
4. Infertility (if underlying PCOS or coagulopathy untreated)
5. Complications of untreated hypothyroidism or PCOS

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Prognosis

• Excellent for anovulatory puberty menorrhagia — most cases resolve spontaneously as the HPO axis matures (within 2–3 years of menarche)
• Cases with underlying coagulopathy (e.g., vWD) require long-term hematologic management but do well with targeted therapy
• PCOS is a chronic condition requiring ongoing management

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Key Points for MBBS Examination

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