CaseMark 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.
Checkpoint A: Pre-Draft Intake (Mandatory)
- Pain characterization — location, quality, severity (0–10 NRS), duration, temporal pattern (cyclic vs. non-cyclic, relation to menses)? (Default: from structured pain history)
- Associated symptoms — dysmenorrhea, dyspareunia (superficial vs. deep), dyschezia, dysuria, bowel changes, bloating? (Default: from ROS)
- Menstrual history — cycle length, regularity, HMB, AUB? (Default: from menstrual calendar)
- Obstetric and surgical history — prior pregnancies, cesarean sections, laparoscopy, appendectomy, prior pelvic surgery? (Default: from history)
- GI and urologic symptoms — IBS criteria (Rome IV), IC/BPS symptoms, recurrent UTI, hematuria? (Default: from symptom questionnaire)
- Psychosocial assessment — depression, anxiety, history of physical or sexual abuse, catastrophizing? (Default: use PHQ-9 and GAD-7)
- Prior treatments — hormonal therapy, analgesics, physical therapy, surgery, complementary therapies? (Default: from prior records)
- 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
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 |
Step 2: Focused Physical Examination
Document the following systematically:
- Abdominal exam — tenderness, guarding, Carnett sign (increased pain with abdominal wall tension = abdominal wall source)
- External vulvar exam — vulvodynia assessment (cotton swab test), Bartholin glands, skin changes
- Single-digit vaginal exam — palpate each pelvic floor muscle group (levator ani, obturator internus) for tenderness, trigger points, and spasm
- Speculum exam — cervical motion tenderness, discharge, lesions
- Bimanual exam — uterine size, shape, mobility, tenderness; adnexal masses or tenderness; uterosacral ligament nodularity (endometriosis)
- 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.
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
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 |
Checkpoint B: Post-Draft Alignment (Mandatory)
- Is the pain fully characterized — location, quality, severity, temporal pattern, and aggravating/alleviating factors?
- Are non-gynecologic causes addressed — GI, urologic, musculoskeletal, and psychosocial etiologies evaluated?
- Is the pelvic floor assessed — muscle tenderness and function documented?
- Is the management plan multimodal — not relying on a single modality?
- Are red flags addressed — weight loss, postmenopausal onset, and family history of malignancy screened?
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
Guidelines
- CPP is multifactorial in most patients — assume overlapping etiologies until proven otherwise. Single-cause thinking leads to missed diagnoses and failed treatments.
- 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.
- Surgery is not first-line — empiric hormonal therapy, physical therapy, and pain management should be trialed before diagnostic laparoscopy in most cases.
- Endometriosis stage does not predict pain — a patient with Stage I may have debilitating pain; do not dismiss symptoms based on minimal surgical findings.
- Screen for IBS and IC/BPS — these conditions co-occur with endometriosis in 30–50% of cases and require independent treatment.
- Avoid chronic opioids — CPP is a chronic condition; opioids worsen long-term outcomes through hyperalgesia, dependence, and hormonal disruption.
- Address the psychosocial dimension — trauma history, depression, and catastrophizing are not "causing" the pain but amplify it through central sensitization; addressing them improves outcomes.
- Document the multidisciplinary plan — include gynecology, pelvic floor PT, pain psychology, and gastroenterology/urology as applicable.