managing-pelvic-pain

# Managing Pelvic Pain

Structures pelvic pain evaluation with systematic differential diagnosis, endometriosis assessment per ASRM staging, and multimodal management per ACOG Practice Bulletin No. 218.

## Why This Skill Exists

Chronic pelvic pain (CPP) — defined as non-cyclic pain in the pelvis lasting ≥ 6 months — affects 15–20% of women aged 18–50 and accounts for 10% of outpatient gynecologic visits and 40% of diagnostic laparoscopies. The differential diagnosis spans gynecologic, urologic, gastrointestinal, musculoskeletal, and neurologic etiologies, making systematic evaluation essential. Endometriosis, the most common gynecologic cause, affects an estimated 10% of reproductive-age women but has an average diagnostic delay of 7–10 years.

ACOG Practice Bulletin No. 218 (Chronic Pelvic Pain) emphasizes a structured, multidisciplinary approach. This skill ensures that each organ system is evaluated, red flags are identified, and management follows evidence-based pathways rather than proceeding directly to surgery.

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## Checkpoint A: Pre-Draft Intake (Mandatory)

1. **Pain characterization** — location, quality, severity (0–10 NRS), duration, temporal pattern (cyclic vs. non-cyclic, relation to menses)? (Default: from structured pain history)
2. **Associated symptoms** — dysmenorrhea, dyspareunia (superficial vs. deep), dyschezia, dysuria, bowel changes, bloating? (Default: from ROS)
3. **Menstrual history** — cycle length, regularity, HMB, AUB? (Default: from menstrual calendar)
4. **Obstetric and surgical history** — prior pregnancies, cesarean sections, laparoscopy, appendectomy, prior pelvic surgery? (Default: from history)
5. **GI and urologic symptoms** — IBS criteria (Rome IV), IC/BPS symptoms, recurrent UTI, hematuria? (Default: from symptom questionnaire)
6. **Psychosocial assessment** — depression, anxiety, history of physical or sexual abuse, catastrophizing? (Default: use PHQ-9 and GAD-7)
7. **Prior treatments** — hormonal therapy, analgesics, physical therapy, surgery, complementary therapies? (Default: from prior records)
8. **Red flags** — unintentional weight loss, postmenopausal onset, rectal bleeding, family history of ovarian/colon cancer? (Default: screen from history)

### Documents to Request

- Pain diary (location, severity, timing, triggers, alleviating factors)
- Prior pelvic imaging (transvaginal ultrasound, MRI)
- Prior surgical/laparoscopy operative reports and pathology
- GI workup results (colonoscopy, stool studies)
- Urologic workup results (urinalysis, cystoscopy, bladder diary)
- Mental health screening results (PHQ-9, GAD-7)
- Physical therapy evaluation notes

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## Step 1: Systematic Differential Diagnosis

### Gynecologic Causes

| Condition | Key Features | Primary Diagnostic Method |
|---|---|---|
| Endometriosis | Cyclic pain, dysmenorrhea, deep dyspareunia, dyschezia, infertility | Clinical diagnosis + laparoscopy (gold standard for confirmation); MRI for deep infiltrating endometriosis |
| Adenomyosis | HMB + dysmenorrhea, globular tender uterus on exam | TVUS or MRI (junctional zone > 12 mm on MRI) |
| Ovarian cysts (functional, endometrioma) | Unilateral pain, may be cyclic | TVUS — endometrioma has ground-glass echogenicity |
| Pelvic adhesions | Post-surgical or post-infectious chronic pain | Diagnosis at laparoscopy; imaging unreliable |
| Chronic PID / hydrosalpinx | History of STI, adnexal tenderness, tubal pathology | TVUS, hysterosalpingogram |
| Leiomyoma | HMB, bulk symptoms, pressure | TVUS |
| Pelvic congestion syndrome | Dull aching worse with standing, multiparous, dilated ovarian veins | MRI or venography — ovarian veins > 6 mm |

### Non-Gynecologic Causes

| System | Conditions | Evaluation |
|---|---|---|
| **GI** | IBS, IBD, chronic constipation, diverticular disease | Rome IV criteria, colonoscopy, stool calprotectin |
| **Urologic** | Interstitial cystitis/BPS, urethral diverticulum, chronic UTI | Bladder diary, potassium sensitivity test, cystoscopy |
| **Musculoskeletal** | Myofascial pain, abdominal wall trigger points (positive Carnett sign), pelvic floor myalgia | Physical exam — Carnett test, pelvic floor muscle assessment |
| **Neurologic** | Pudendal neuralgia, ilioinguinal nerve entrapment | Nerve blocks (diagnostic and therapeutic) |
| **Psychosocial** | Central sensitization, trauma-related pain, somatization | Validated screening tools, referral to pain psychology |

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## Step 2: Focused Physical Examination

Document the following systematically:

1. **Abdominal exam** — tenderness, guarding, Carnett sign (increased pain with abdominal wall tension = abdominal wall source)
2. **External vulvar exam** — vulvodynia assessment (cotton swab test), Bartholin glands, skin changes
3. **Single-digit vaginal exam** — palpate each pelvic floor muscle group (levator ani, obturator internus) for tenderness, trigger points, and spasm
4. **Speculum exam** — cervical motion tenderness, discharge, lesions
5. **Bimanual exam** — uterine size, shape, mobility, tenderness; adnexal masses or tenderness; uterosacral ligament nodularity (endometriosis)
6. **Rectovaginal exam** — uterosacral nodularity, cul-de-sac tenderness, rectovaginal septum nodules (deep infiltrating endometriosis)

Document findings by location and severity. Use anatomic diagrams or pain maps when available.

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## Step 3: Endometriosis-Specific Evaluation

### ASRM Revised Classification (Stages I–IV)

| Stage | Description | Point Score |
|---|---|---|
| I — Minimal | Isolated implants, no significant adhesions | 1–5 |
| II — Mild | Superficial implants, < 5 cm total, no significant adhesions | 6–15 |
| III — Moderate | Deep implants, small endometriomas, filmy adhesions | 16–40 |
| IV — Severe | Large endometriomas, dense adhesions, cul-de-sac obliteration | > 40 |

Note: ASRM staging correlates poorly with pain severity. A patient with Stage I may have severe pain, while Stage IV may be incidentally found.

### Empiric Treatment Without Surgery
- Empiric trial of hormonal suppression (combined OCs, progestins, GnRH agonist/antagonist) is appropriate when clinical suspicion is high
- If symptoms respond to hormonal suppression, this supports (but does not confirm) the diagnosis
- NSAIDs for dysmenorrhea (first-line analgesic)

### Surgical Confirmation and Treatment
- Laparoscopy with biopsy remains the gold standard for definitive diagnosis
- Excision of endometriosis is preferred over ablation for deep lesions
- Document all implant locations, adhesion severity, and whether complete excision was achieved

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## Step 4: Multimodal Management Plan

| Modality | Options | Evidence Level |
|---|---|---|
| **Hormonal** | Combined OCs (continuous), LNG-IUD, DMPA, GnRH agonists with add-back, dienogest, elagolix | High for endometriosis-related pain |
| **Analgesic** | NSAIDs, acetaminophen; avoid chronic opioids for CPP | Moderate for symptom relief |
| **Physical therapy** | Pelvic floor PT for myofascial component — 60-70% report improvement | High for pelvic floor myalgia |
| **Neuromodulators** | Amitriptyline, duloxetine, gabapentin for central sensitization | Moderate |
| **Psychological** | CBT, mindfulness-based stress reduction, pain neuroscience education | High for chronic pain management |
| **Surgical** | Laparoscopic excision (endometriosis), adhesiolysis, presacral neurectomy, hysterectomy with BSO (last resort) | Varies by condition |

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## Checkpoint B: Post-Draft Alignment (Mandatory)

1. **Is the pain fully characterized** — location, quality, severity, temporal pattern, and aggravating/alleviating factors?
2. **Are non-gynecologic causes addressed** — GI, urologic, musculoskeletal, and psychosocial etiologies evaluated?
3. **Is the pelvic floor assessed** — muscle tenderness and function documented?
4. **Is the management plan multimodal** — not relying on a single modality?
5. **Are red flags addressed** — weight loss, postmenopausal onset, and family history of malignancy screened?

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## Quality Audit

- [ ] Pain characterized using standardized descriptors (location, NRS severity, quality, timing)
- [ ] Cyclic vs. non-cyclic pattern documented
- [ ] Dysmenorrhea, dyspareunia, dyschezia, and dysuria specifically asked and documented
- [ ] Pregnancy excluded in reproductive-age patients
- [ ] Pelvic exam performed with single-digit assessment of pelvic floor muscles
- [ ] Carnett sign documented (positive = abdominal wall source)
- [ ] Uterosacral ligament palpation performed for endometriosis nodularity
- [ ] TVUS ordered or results documented
- [ ] Non-gynecologic causes systematically evaluated (IBS, IC/BPS, musculoskeletal)
- [ ] Psychosocial screening performed (PHQ-9, GAD-7, abuse history)
- [ ] ASRM staging documented if laparoscopy performed
- [ ] Management plan includes at least 2 modalities (hormonal, PT, psychological, analgesic)
- [ ] Red flags screened and documented
- [ ] Follow-up plan with reassessment timeline documented
- [ ] Opioid use assessed and alternatives prioritized

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## Guidelines

1. **CPP is multifactorial in most patients** — assume overlapping etiologies until proven otherwise. Single-cause thinking leads to missed diagnoses and failed treatments.
2. **Pelvic floor examination is mandatory** — pelvic floor myalgia is present in up to 85% of CPP patients and is frequently the primary pain generator, yet is the most commonly missed diagnosis.
3. **Surgery is not first-line** — empiric hormonal therapy, physical therapy, and pain management should be trialed before diagnostic laparoscopy in most cases.
4. **Endometriosis stage does not predict pain** — a patient with Stage I may have debilitating pain; do not dismiss symptoms based on minimal surgical findings.
5. **Screen for IBS and IC/BPS** — these conditions co-occur with endometriosis in 30–50% of cases and require independent treatment.
6. **Avoid chronic opioids** — CPP is a chronic condition; opioids worsen long-term outcomes through hyperalgesia, dependence, and hormonal disruption.
7. **Address the psychosocial dimension** — trauma history, depression, and catastrophizing are not "causing" the pain but amplify it through central sensitization; addressing them improves outcomes.
8. **Document the multidisciplinary plan** — include gynecology, pelvic floor PT, pain psychology, and gastroenterology/urology as applicable.