Which of the following statements about the Levator Ani is false?

Made up of iliococcygeus, pubococcygeus, and puborectalis.

A patient complains to a physician of chronic pain and tingling of the buttocks. The pain is exacerbated when the buttocks are compressed by sitting on a toilet seat or chair for long periods. No lumbar pain is noted. Pain is elicited when the physician performs Freiberg's maneuver. Most likely diagnosis?

Disk compression of the sciatic nerve

A patient has dyspareunia, and dysmenorrhea with adnexal tenderness. What is the first step of investigation?

Transabdominal pelvic ultrasound

A 35-year-old woman presents with widespread musculoskeletal pain, fatigue, and poor sleep. She has tenderness in 14 of 18 specific points on physical exam. What is the best treatment strategy?

Pharmacological pain management with opioids

Surgical intervention for pain relief

Musculoskeletal Causes of Pelvic Pain for INI-CET: High-Yield Obstetrics and Gynecology Lessons

Introduction to MSK Pelvic Pain - Pelvic Puzzle Pieces

Musculoskeletal (MSK) pelvic pain: Pain arising from pelvic bones, joints, muscles, fascia, or nerves.
Often chronic, mimicking visceral pain; a diagnosis of exclusion.
Prevalence: Accounts for 10-20% of chronic pelvic pain cases.
Common contributors: Trauma (childbirth, surgery), poor posture, overuse, myofascial trigger points, joint dysfunction (e.g., sacroiliac, pubic symphysis).
Key structures involved: Pelvic floor muscles (levator ani, coccygeus), piriformis, obturator internus, abdominal wall muscles.

Anatomy of the Female Pelvic Floor Muscles

⭐ Myofascial trigger points in the pelvic floor muscles are a common and often overlooked source of chronic pelvic pain that can refer pain to distant sites.

Myofascial Pelvic Pain - Knotty Nuisances

Hyperirritable spots (Trigger Points - TrPs) in taut muscle/fascia bands.
Key Muscles & Referral:
- Levator Ani:
  - TrPs: Lateral vaginal/rectal walls.
  - Referral: Vagina, rectum, coccyx, posterior thigh. Pain with defecation/intercourse.
- Obturator Internus:
  - TrPs: Lateral vaginal wall, ischial tuberosity.
  - Referral: Vagina, rectum, medial thigh, gluteal area.
- Piriformis:
  - TrPs: Deep gluteal region.
  - Referral: Buttock, posterior thigh/leg (sciatic-like), perineum.
- Abdominal Wall (e.g., Rectus Abdominis):
  - TrPs: Lower abdomen.
  - Referral: Pelvic area, groin.
Features: Deep, aching pain; dyspareunia; urinary/bowel issues.
Diagnosis: Palpation of TrPs reproducing specific pain; Carnett's sign (abdominal).
Management: TrP release (manual/needling), physiotherapy, stretching.

⭐ Piriformis syndrome often mimics lumbar radiculopathy; pain typically worsens with sitting and internal hip rotation.

Pelvic muscle pain referral patterns

Key MSK Pelvic Syndromes - Pinpointing the Pain

Focus on differentiating common musculoskeletal causes of pelvic pain.

Syndrome	Pain Profile	Etiology	Triggers & Signs
Piriformis Syndrome	Buttock, posterior thigh; sciatic-like, deep ache.	Piriformis muscle spasm/hypertrophy compressing sciatic nerve.	Prolonged sitting, activity. Tenderness over piriformis. Positive FAIR test (Flexion, Adduction, Internal Rotation). 📌 Mnemonic: Piriformis makes it unFAIR to sit.
Pelvic Girdle Pain (PGP) / Symphysis Pubis Dysfunction (SPD)	Symphysis pubis, SI joints, groin, inner/posterior thigh. Aching, stabbing.	Pregnancy (relaxin, ↑load), trauma, arthritis.	Weight-bearing, walking, stairs, single leg stance. Waddling gait. Palpable gap/tenderness at symphysis (SPD). Positive ASLR, Patrick's (FABER).
Coccydynia	Sharp/dull pain localized to coccyx (tailbone).	Direct trauma (fall, childbirth), repetitive strain, idiopathic.	Prolonged sitting (esp. hard surfaces), rising from sitting, direct pressure. Tenderness on coccyx palpation. Pain often worse during defecation.

⭐ Piriformis syndrome can mimic lumbar disc herniation symptoms, but true neurological deficits (e.g., weakness, reflex loss) are typically absent.

MSK Pelvic Pain: Dx & Rx - Easing the Ache

Diagnosis (Dx):
- Thorough Hx & Physical Exam:
  - Identify trigger points (e.g., levator ani, obturator internus), muscle tenderness.
  - Special tests: Carnett's sign (↑ pain with abdominal wall tensing suggests myofascial origin).
- Rule out other system pathologies (gynae, uro, GI).
Management (Rx) - Tiered Approach:
- 1st Line: Physiotherapy (myofascial release, stretching, strengthening), NSAIDs, heat/cold.
- 2nd Line: Muscle relaxants, neuropathic agents (e.g., amitriptyline, gabapentin).
- 3rd Line: Trigger point injections (local anesthetic ± steroid), nerve blocks.
- Lifestyle modification: Ergonomics, stress management.

⭐ Carnett's sign: Increased point tenderness when abdominal muscles are tensed is highly suggestive of abdominal wall/myofascial pain rather than visceral pain. Pain ↓ or unchanged suggests visceral origin.

High‑Yield Points - ⚡ Biggest Takeaways

Piriformis syndrome: Sciatic nerve compression; pain radiates down posterior thigh.

Levator ani syndrome: Chronic rectal/vaginal ache from levator muscle spasm; tender on palpation.

Myofascial pain: Identified by trigger points in pelvic floor or abdominal muscles.

Coccydynia: Localized coccyx pain, aggravated by sitting or direct pressure.

Pelvic Girdle Pain (PGP): Frequent in pregnancy; involves symphysis pubis or SI joints.

Diagnosis is mainly clinical; Carnett's sign helps identify abdominal wall pain source.

Continue reading on Oncourse

CONTINUE READING — FREE

or get the app

App Store|Google Play

Musculoskeletal Causes of Pelvic Pain