⚕️FREE MSRA PODCAST –Meralgia Paraesthetica
🎧 The essentials on this surprisingly common sensorynerve entrapment syndrome – ideal for rapid revision, on-the-go learning, orcementing the key facts for your MSRA.
🧠Key Learning Points
📌Definition
• Meralgiaparaesthetica is a condition caused by compression or irritation of the lateral femoral cutaneous nerve (LFCN), leadingto numbness, tingling, burning, or pain on the outer (anterolateral) thigh.
📌Causes & RiskFactors
• Mechanicalcompression of the LFCN, most often near the inguinal ligament
• Tight clothing(e.g., belts, waistbands, skinny jeans)
• Obesity(especially abdominal weight gain)
• Pregnancy (weightand postural changes)
• Scar tissue fromprevious pelvic or hip surgery
• Direct trauma tohip/groin
• Pelvic masses(rare)
• Activitiesinvolving repetitive hip flexion (sports, prolonged standing)
• Risk increaseswith diabetes, ascites, and anatomical variations
Mnemonic: “TightTrousers, Tummy, Trauma, and Tummy Trouble”
📌Pathophysiology
• Compression orstretching of the LFCN as it passes under/through the inguinal ligament
• Disrupted nervesignalling causes sensory symptoms only(no weakness)
• Nerve roots L2-L3→ LFCN → outer thigh skin
📌Symptoms
• Numbness,tingling, burning, or pain strictly on the outer thigh
• Symptoms worsenwith pressure (tight belts), standing, walking, or hip extension
• Skin may behypersensitive (allodynia)
• NO motor weakness or reflex changes
Mnemonic: “M forMeralgia, M for Male, M for Middle-age, M for Motor sparing”
📌DifferentialDiagnosis
• Diabeticneuropathy
• Lumbarradiculopathy (L2/L3 root impingement)
• Hip jointpathology (OA, bursitis)
• Peripheral nerveentrapment (femoral/sciatic)
• Vascularclaudication
• Rare: tumours,infections, referred pain
📌Diagnosis
• Clinical diagnosis: classic sensory symptoms,positive pelvic compression test (pain reproduced by pressing medial/inferiorto the ASIS)
• No muscle weakness
• Nerve conductionstudies or local anaesthetic nerve block (diagnostic & sometimestherapeutic) if unclear
• Imaging(ultrasound, MRI) only to rule out mimics or in atypical cases
📌Management
• Conservative first:
– Removeaggravating factors (loose clothing, weight loss)
– Simple analgesia(paracetamol, NSAIDs)
• If symptoms persist:
– Corticosteroidinjections (often ultrasound-guided)
– Medications forneuropathic pain (amitriptyline, gabapentin, pregabalin)
– Physiotherapy(nerve mobilisation, stretching, addressing biomechanics)
– TENS (sometimesused adjunctively)
• Surgery (nerve decompression) only for severe,refractory cases
📌Complications &Prognosis
• Prognosis isgenerally excellent: most improve with conservative treatment
• Chronic pain orpersistent sensory change is rare
• Quality of lifeimpact can be significant in severe/untreated cases
📎MSRA Resources forMeralgia Paraesthetica
📝 Revision Notes: https://www.passthemsra.com/topic/meralgia-paraesthetica-revision-notes/
🧠 Flashcards: https://www.passthemsra.com/topic/meralgia-paraesthetica-flashcards/
💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/meralgia-paraesthetica-accordion-qa-notes/
🚀 Rapid Quiz: https://www.passthemsra.com/topic/meralgia-paraesthetica-rapid-quiz/
🎓 Full Quiz: https://www.passthemsra.com/quizzes/meralgia-paraesthetica/
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