Multiple Epiphyseal Dysplasia — MED / একাধিক এপিফাইসিয়াল ডিসপ্লাসিয়া

1) Definition / সংজ্ঞা

Multiple epiphyseal dysplasia (MED) হলো একটি genetic skeletal dysplasia, যেখানে long bone-এর epiphysis বা bone-end-এর cartilage-to-bone development abnormal হয়। ফলে childhood/early adolescence থেকে hip/knee pain, waddling gait, mild short stature, restricted joint movement এবং পরে early-onset osteoarthritis দেখা যায়। Dominant ও recessive—দুই ধরনের inheritance হতে পারে।

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2) Cause / Etiology — কারণগুলো

A. Genetic cause

• Autosomal dominant MED বেশি common। সাধারণ gene:
  • COMP
  • MATN3
  • COL9A1
  • COL9A2
  • COL9A3
• Autosomal recessive MED সাধারণত:
  • SLC26A2 mutation-এর কারণে হয়।
  • কিছু newer/rare forms-এ CANT1-ও reported।

B. Pathophysiology / রোগ কীভাবে হয়

• এই genes cartilage extracellular matrix protein তৈরি করে।
• Mutation হলে cartilage matrix দুর্বল/অস্বাভাবিক হয়।
• Epiphysis-এর endochondral ossification delayed & irregular হয়।
• X-ray-তে epiphysis ছোট, flat, irregular দেখা যায়।
• Large weight-bearing joints—বিশেষ করে hip ও knee—progressive deformity ও early osteoarthritis-এর দিকে যায়।

C. Inheritance / পরিবারে যাওয়ার ধরন

• Dominant MED হলে affected parent থাকলে সন্তানের ঝুঁকি প্রায় 50%।
• Recessive MED হলে parents carrier হতে পারেন; consanguinity থাকলে risk বাড়ে।
• Family history না থাকলেও de novo mutation হতে পারে।

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3) Symptoms / Clinical Features — লক্ষণগুলো

Common symptoms

• Hip ও knee pain — exercise বা হাঁটার পর বেশি।
• Fatigue with long-distance walking — একটু হাঁটলেই ক্লান্তি।
• Waddling gait — হাঁটার সময় দুলে দুলে হাঁটা।
• Mild short stature — height normal range-এর নিচে বা mildly short হতে পারে।
• Limb relatively short compared with trunk — হাত-পা তুলনামূলক ছোট লাগতে পারে।
• Restricted range of motion — hip, knee, elbow-তে stiffness।
• Joint deformity — genu varum/genu valgum, hip deformity।
• Early-onset osteoarthritis — teenage/young adult age থেকেই hip/knee OA features।

Recessive MED-এ অতিরিক্ত লক্ষণ

• Clubfoot
• Clinodactyly
• Cleft palate
• Scoliosis
• Double-layered patella — lateral knee X-ray-তে দেখা যেতে পারে।

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4) Clinical Diagnosis — কীভাবে clinically suspect করবেন

MED suspect করবেন যদি:

• শিশু/কিশোরের bilateral hip/knee pain থাকে।
• Pain exercise/walking-এর পর বাড়ে।
• Waddling gait বা limp থাকে।
• Height mildly short, কিন্তু face/intelligence normal।
• Family history-তে early osteoarthritis বা short stature থাকে।
• Multiple joints involved, কিন্তু inflammatory arthritis-এর মতো persistent swelling, fever, high ESR/CRP নাও থাকতে পারে।
  Diagnosis established হয় typical clinical + radiographic findings অথবা MED-related pathogenic variant genetic testing-এ পাওয়া গেলে।

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5) Investigations — Specific Workup

A. First-line imaging

1. X-ray pelvis with both hips — AP pelvis + frog-lateral view

• Capital femoral epiphysis ছোট/irregular/flattened।
• Bilateral Perthes-like appearance হতে পারে।
• Acetabular irregularity/early degenerative change দেখা যেতে পারে।

2. X-ray both knees — AP + lateral

• Distal femoral/proximal tibial epiphysis small, irregular, delayed ossification।
• Recessive MED হলে lateral view-তে double-layered patella দেখা যেতে পারে।

3. X-ray hands/wrists

• Short tubular bones, dense/“ivory” epiphyses।
• Bone age variation দেখা যেতে পারে।

4. Standing long-leg alignment X-ray / scanogram

• Genu varum/genu valgum।
• Limb length discrepancy।
• Mechanical axis assessment for corrective osteotomy planning।

5. Spine X-ray

• Dominant MED-এ spine usually normal, তবে Schmorl nodes/irregular end plates থাকতে পারে; spine involvement বেশি হলে pseudoachondroplasia/SED ভাবতে হবে।

B. Genetic testing

Best confirmatory test: skeletal dysplasia multigene panel

• Include: COMP, MATN3, COL9A1, COL9A2, COL9A3, SLC26A2, CANT1, COL2A1
• Atypical case হলে whole exome sequencing / genome sequencing করা যায়। GeneReviews অনুযায়ী multigene panel সবচেয়ে practical approach।

C. Lab tests — MED confirm করে না, differential exclude করে

• CBC, ESR, CRP — inflammatory arthritis exclude।
• Serum calcium, phosphate, ALP, 25-OH vitamin D, PTH — rickets/osteomalacia exclude।
• TSH, free T4 — hypothyroidism-related growth/joint problem exclude।
• Renal function, LFT — NSAID/analgesic safety baseline।
• RF/anti-CCP/ANA — inflammatory arthritis suspicion থাকলে।
• Urine routine — renal issue থাকলে NSAID safety evaluation।

D. MRI — কখন করবেন

• Hip pain severe হলে Perthes disease, SCFE, AVN, synovitis exclude করতে।
• Preoperative planning।
• Cartilage/epiphyseal morphology better assessment।

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6) Differential Diagnosis — যেগুলো আলাদা করতে হবে

• Bilateral Legg–Calvé–Perthes disease
• Slipped capital femoral epiphysis — SCFE
• Pseudoachondroplasia
• Mild spondyloepiphyseal dysplasia — SED
• Rickets / vitamin D deficiency
• Juvenile idiopathic arthritis
• Hypothyroidism
• Mucopolysaccharidosis
• Spondyloepimetaphyseal dysplasia
• Early familial osteoarthritis
  GeneReviews differential table-এ Perthes/COL2A1-related disorder, pseudoachondroplasia, SLC26A2-related recessive MED উল্লেখ আছে।

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7) Complications — রোগের জটিলতা

• Early osteoarthritis — hip/knee-তে young age-এ OA; pain, stiffness, functional limitation।
• Chronic pain syndrome — long-term pain, school/work limitation।
• Limb deformity — genu varum/genu valgum, hip deformity।
• Restricted mobility — stairs ওঠা, long walking, sports difficult।
• Limp/waddling gait — gait abnormality persistent হতে পারে।
• Need for surgery — corrective osteotomy, acetabular osteotomy, severe OA হলে total hip/knee arthroplasty।
• Psychosocial impact — short stature, chronic pain, disability, social limitation।
• Obesity-related worsening — body weight বেশি হলে affected joints-এ load বাড়ে, pain/OA দ্রুত worsen করতে পারে।

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8) Treatment / Management

MED-এর curative drug নেই। চিকিৎসার goal হলো pain control, joint function preserve, deformity correction, OA delay, mobility maintain। GeneReviews management অংশে analgesics + physiotherapy/hydrotherapy, orthopedic assessment, osteotomy এবং severe degenerative hip disease হলে arthroplasty উল্লেখ আছে।

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A. Non-pharmacological management

• Pediatric orthopedic / skeletal dysplasia specialist referral
• Physiotherapy
  • Hip/knee ROM exercise
  • Quadriceps/hip abductor strengthening
  • Low-impact conditioning
• Hydrotherapy / swimming
  • Joint load কমিয়ে muscle strength বাড়ায়।
• Activity modification
  • Running, jumping, repetitive high-impact sports avoid।
  • Cycling/swimming better।
• Weight control
  • Obesity joint stress বাড়ায়; avoid করা জরুরি।
• Orthotics
  • Shoe raise for limb length discrepancy।
  • Knee brace if malalignment/pain।
• Surgery
  • Progressive deformity হলে guided growth/osteotomy।
  • Severe hip/knee OA হলে joint replacement.

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9) Pharmacological Treatment — Bangladesh-available brandsসহ

Important: MED genetic cartilage disorder; নিচের ওষুধগুলো disease cure করে না—pain, inflammation, vitamin deficiency বা NSAID gastric protection-এর জন্য ব্যবহৃত হয়। Dose patient age, weight, renal function, liver function, ulcer risk, pregnancy status অনুযায়ী adjust করতে হবে।

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1. Paracetamol / Acetaminophen

• Generic name: Paracetamol
• Therapeutic category: Analgesic, antipyretic
• Pharmacological class: Non-opioid analgesic
• কেন used হয়: MED-তে mild–moderate hip/knee pain control-এর first-line safer option; inflammation কমায় না, pain কমায়।
• Adult dose: 500 mg–1 g orally every 4–6 hours PRN; maximum 4 g/day. NHS adult dosing অনুযায়ী 500 mg tablet 1–2টি করে, দিনে সর্বোচ্চ 8টি 500 mg tablet।
• Child dose: সাধারণত 10–15 mg/kg/dose every 4–6 hours PRN; maximum usually 60 mg/kg/day বা local protocol অনুযায়ী। NICE BNFC child dosing weight/age অনুযায়ী করে।
• Duration: Acute pain flare হলে 2–3 দিন; chronic pain হলে regular long-term না দিয়ে review করতে হবে।
• Side effects: Nausea, rash rare; overdose হলে severe hepatotoxicity।
• Drug interaction: Alcohol, enzyme-inducing antiepileptics, warfarin with prolonged high-dose use, other paracetamol-containing cold/flu products।
• Bangladesh available brand examples — MedEx-listed:
  • Napa 500 mg tablet, Napa syrup 120 mg/5 ml, Napa Extend 665 mg — Beximco
  • Ace 500 mg tablet, Ace syrup 120 mg/5 ml, Ace Power 1000 mg, Ace XR 665 mg — Square
  • Fast 500 mg tablet/syrup, Atopen 500 mg, Centamol 500 mg, Feva 500 mg — MedEx brand listে listed।

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2. Ibuprofen

• Generic name: Ibuprofen
• Therapeutic category: NSAID, analgesic, anti-inflammatory
• Pharmacological class: Propionic acid derivative NSAID; COX inhibitor
• কেন used হয়: MED pain-এর সাথে inflammatory component, stiffness, activity-related joint pain থাকলে short course।
• Adult/adolescent dose: 200–400 mg orally every 6 hours PRN; MedEx Flamex monographে >40 kg/≥12 years-এ 200–400 mg 3–4 times/day, max 1200 mg/day OTC-type regimen উল্লেখ আছে। Rheumatic disease dose physician-supervised higher হতে পারে।
• Child dose: 5–10 mg/kg/dose every 6–8 hours PRN; MedEx suspension dose age/weight অনুযায়ী এবং juvenile arthritis-এ 30–40 mg/kg/day পর্যন্ত physician-directed উল্লেখ আছে।
• Duration: 3–5 দিন flare pain; chronic continuous use avoid unless specialist review।
• Side effects: Dyspepsia, gastritis, peptic ulcer/GI bleeding, renal impairment, fluid retention, BP rise, asthma exacerbation, rash।
• Contraindication/caution: Active ulcer/GI bleed, severe renal/hepatic/heart failure, NSAID allergy/asthma, dehydration, third trimester pregnancy।
• Interaction: Warfarin/antiplatelet/SSRI/steroid → GI bleed risk; ACEI/ARB + diuretic → renal risk; lithium, methotrexate, cyclosporine/tacrolimus; other NSAIDs avoid। MedEx interaction listে anticoagulant, ACE inhibitor, diuretic, lithium, methotrexate, warfarin, steroid ইত্যাদি উল্লেখ আছে।
• Bangladesh available brand examples — MedEx-listed:
  • Flamex 200 mg/400 mg tablet, suspension 100 mg/5 ml — ACI
  • Advel 200 mg/400 mg, suspension 100 mg/5 ml — Opsonin
  • Reumafen 200 mg/400 mg, suspension 100 mg/5 ml — Beximco
  • Profen 400 mg, suspension 100 mg/5 ml — ACME
  • Intaflam 400 mg — Incepta
  • Neurofen 400 mg, Brofen 400 mg, Trufen 400 mg — MedEx-listed।

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3. Naproxen sodium

• Generic name: Naproxen sodium
• Therapeutic category: NSAID; drugs for osteoarthritis/rheumatoid arthritis
• Pharmacological class: Propionic acid derivative NSAID; non-selective COX-1/COX-2 inhibitor
• কেন used হয়: Longer-acting NSAID; recurrent hip/knee pain, early OA-like pain, night pain বা prolonged activity-related pain-এ specialistরা short course দিতে পারেন।
• Adult dose: 250–500 mg twice daily after food; max 1000 mg/day. MedEx Naprosyn monographে OA/RA/AS-এ 500–1000 mg/day in two divided doses উল্লেখ আছে।
• Child: Routine MED pain-এ generally avoid; juvenile arthritis indicationে >2 years 10 mg/kg/day in two divided doses physician-directed, MedEx অনুযায়ী।
• Duration: 3–7 দিন flare; chronic use হলে renal function, BP, GI risk monitor।
• Side effects: Heartburn, abdominal pain, nausea, diarrhea, dyspepsia, headache, vertigo, drowsiness, edema, palpitation, renal impairment।
• Interaction: Warfarin/SSRI → GI bleed; aspirin/other NSAIDs ↑ adverse effects; ACE inhibitors/diuretics effect reduce & renal risk; methotrexate toxicity; antacids/sucralfate absorption delay।
• Bangladesh available brand examples — MedEx-listed:
  • Naprosyn 250 mg/500 mg tablet, suspension 125 mg/5 ml — Radiant
  • Naprox 250 mg/500 mg, suspension 125 mg/5 ml — Eskayef
  • Anaflex 250 mg/500 mg — ACI
  • Naxin 250 mg/500 mg, gel 10% — Opsonin
  • Napro-A 250 mg/500 mg — ACME
  • Ecless 250 mg/500 mg — Incepta
  • Napro 250 mg/500 mg — Aristopharma
  • Naproxen 500 mg — Amico/Novatek/Guardian listed।

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4. Diclofenac sodium topical gel

• Generic name: Diclofenac sodium
• Therapeutic category: NSAID; drugs for osteoarthritis/rheumatologic pain
• Pharmacological class: Acetic acid derivative NSAID; prostaglandin synthesis inhibitor
• কেন used হয়: Local knee/ankle/hip-area soft-tissue or superficial joint pain-এ; systemic NSAID risk কমাতে topical option।
• Dose: Diclofenac gel 1% বা 2%; affected area অনুযায়ী 2–4 g gel 3–4 times/day, lightly rub; MedEx Voligel monographে এ dose দেওয়া আছে।
• Duration: 7–14 দিন; persistent pain হলে orthopedic review।
• Side effects: Local burning, redness, rash, dermatitis; large area/long use করলে systemic NSAID adverse effect possible।
• Interaction: Systemic NSAID/anticoagulant/steroid/warfarin use করলে caution; eye/mucosa/occlusive dressing avoid।
• Bangladesh available brand examples — MedEx-listed:
  • Voligel 1% w/w gel, Voligel Max 2% — Beximco
  • Volifen 1% gel — Opsonin
  • Voltafen 1% gel — Sharif
  • Voltagel 1% / DS 2% gel — Eskayef
  • Volpro 50 mg tablet — Mystic listed।

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5. Omeprazole / Esomeprazole — NSAID gastric protection

• Generic name: Omeprazole / Esomeprazole
• Therapeutic category: Anti-ulcerant
• Pharmacological class: Proton pump inhibitor — PPI
• কেন used হয়: NSAID-associated gastritis/ulcer risk থাকলে gastric protection; MED-এর direct treatment নয়।
• Dose:
  • Omeprazole 20 mg once daily before breakfast; NSAID-induced ulcer prevention/treatmentে 4–8 weeks depending indication। MedEx Seclo MUPS pageে NSAID-induced ulcerationে 20 mg once daily for 4–8 weeks উল্লেখ আছে।
  • Esomeprazole 20 mg once daily; GERD/ulcer/dyspepsia indicationে used।
• Side effects: Headache, diarrhea/constipation, nausea, abdominal pain; long-term useে hypomagnesemia, B12 deficiency, fracture/infection risk consider। MedEx Maxpro MUPS pageে headache, diarrhea, nausea, abdominal pain, constipation, dry mouth ইত্যাদি listed।
• Interaction: Clopidogrel effect reduce concern with omeprazole/esomeprazole; warfarin, phenytoin, diazepam; methotrexate high dose; long-term with diuretics → low Mg risk।
• Bangladesh available brand examples — MedEx-listed:
  • Seclo 20 mg capsule / Seclo MUPS 20 mg — Square
  • Losectil 20 mg capsule / Losectil MUPS 20 mg — Eskayef
  • Maxpro 20 mg / 40 mg, Maxpro MUPS 20 mg — Renata
  • Sergel 20 mg — Healthcare/other manufacturers listed by MedEx।

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6. Calcium + Vitamin D3

• Generic name: Calcium carbonate + Vitamin D3 / Eggshell calcium + Vitamin D3
• Therapeutic category: Mineral + vitamin supplement
• Pharmacological class: Specific mineral & vitamin combined preparation
• কেন used হয়: MED cure করার জন্য নয়; যদি dietary deficiency, low calcium intake, osteopenia/osteomalacia/rickets, vitamin D insufficiency থাকে।
• Dose: Common adult regimen 1 tablet once or twice daily after meal; Shelcal-D pageে 500 mg+200 IU এবং 600 mg+400 IU composition, এবং one tablet morning + one at night physician-directed উল্লেখ আছে।
• Side effects: Constipation, bloating, hypercalcemia, kidney stone risk।
• Interaction: Tetracycline/doxycycline/quinolone/levothyroxine/iron absorption কমায়—2–4 hour gap; digoxin with hypercalcemia risk; thiazide diuretics ↑ calcium। MedEx Shelcal-D interaction sectionে digoxin, antacids, other calcium, calcitriol, tetracycline/doxycycline ইত্যাদি উল্লেখ আছে।
• Bangladesh available brand examples — MedEx-listed:
  • Shelcal-D 500 mg+200 IU, Shelcal-D 600 mg+400 IU — Opsonin
  • Calbo-D 500 mg+200 IU — Square
  • Calcin-D 500 mg+200 IU, Calcin-DX 600 mg+400 IU — Renata
  • Aristocal D 500 mg+200 IU — Beximco
  • A-Cal D 500 mg+200 IU, A-Cal DX 500 mg+400 IU — ACME
  • Acical-D 500 mg+200 IU, Acical-DX 600 mg+400 IU — ACI।

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7. Cholecalciferol / Vitamin D3

• Generic name: Cholecalciferol / Vitamin D3
• Therapeutic category: Vitamin D preparation
• Pharmacological class: Vitamin in bone formation
• কেন used হয়: 25-OH vitamin D low হলে deficiency correction; bone pain/rickets/osteomalacia coexisting থাকলে। MED-এর genetic epiphyseal defect cure করে না।
• Dose:
  • Adult deficiency: 40,000 IU once weekly for 7 weeks, then maintenance 1400–2000 IU/day; MedEx D3 pageে dose উল্লেখ আছে।
  • Children 12–18 years: 20,000 IU once every 2 weeks for 6 weeks if deficiency, physician-directed।
• Side effects: Nausea, vomiting, constipation, anorexia; overdose → hypercalcemia, polyuria, thirst, weakness, renal stone/calcification।
• Interaction: Phenytoin/barbiturate/glucocorticoid effect reduce; cholestyramine/paraffin oil absorption reduce; digoxin/cardiac glycosides with hypercalcemia risk।
• Bangladesh available brand examples — MedEx-listed:
  • D3 40,000 IU capsule, 20,000 IU, 2000 IU — ACI
  • D-Rise 20,000/40,000 IU capsule, 2000 IU tablet, 200,000 IU/ml oral/IM — Beximco
  • Hi-D 20,000/40,000 IU capsule, 2000 IU tablet — Popular
  • D-Fill 20,000/40,000 IU capsule, 2000 IU tablet — General
  • Osteo-D 40,000 IU capsule, 2000 IU chewable — Incepta
  • Vita D3 20,000/40,000 IU — Renata
  • Max D 1000/2000/20,000/40,000 IU — Ziska।

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10) Bangladesh doctors’ common prescription pattern — MED patient এ কোন drug কেন ব্যবহার হয়

• Paracetamol 500 mg / syrup 120 mg/5 ml
  • First-line pain relief।
  • Gastric/renal risk কম।
  • Mild hip/knee pain বা physiotherapy after-pain-এ।
• Ibuprofen 200/400 mg বা suspension 100 mg/5 ml
  • Pain + inflammatory stiffness থাকলে।
  • Short flare management।
  • Ulcer/renal/asthma risk থাকলে avoid/caution।
• Naproxen 250/500 mg
  • Longer pain control দরকার হলে।
  • Early OA-like pain, night pain, recurrent activity-related pain।
  • Usually adolescent/adult; pediatric use specialist-directed।
• Diclofenac gel 1%/2%
  • Local superficial joint/soft tissue pain।
  • Oral NSAID avoid করতে চাইলে।
  • Skin irritation watch।
• PPI — Omeprazole 20 mg / Esomeprazole 20 mg
  • NSAID চললে gastritis/ulcer risk protection।
  • Past ulcer, dyspepsia, steroid/anticoagulant co-use, older adolescent/adult risk profile থাকলে।
• Calcium + Vitamin D3
  • Diet poor, low bone mineral status, vitamin D deficiency, osteomalacia/rickets suspicion থাকলে।
  • MED-specific cure নয়।
• Cholecalciferol 20,000/40,000 IU
  • 25-OH vitamin D low হলে correction।
  • Baseline ও follow-up calcium/Vit D monitoring দরকার।

সাধারণত routine MED prescription-এ avoid/indicated নয়

• Steroid — MED pain/OA-এর জন্য routine নয়।
• DMARDs — inflammatory arthritis না থাকলে নয়।
• Antibiotics — infection না থাকলে নয়।
• Bisphosphonate — MED-এর epiphyseal dysplasia cure করে না; osteoporosis-specific indication ছাড়া নয়।
• Opioid/tramadol — chronic pediatric skeletal painে routine avoid; specialist pain clinic ছাড়া নয়।

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11) Prevention — কীভাবে prevent করবেন

Primary prevention

• Genetic disorder হওয়ায় জন্মের পর lifestyle দিয়ে disease prevent করা যায় না।
• Family mutation জানা থাকলে:
  • Genetic counselling
  • Carrier/at-risk family member testing
  • Prenatal testing / preimplantation genetic testing — mutation known থাকলে possible।

Progression prevention

• Weight normal রাখা।
• High-impact repetitive exercise avoid।
• Swimming/cycling/low-impact exercise encourage।
• Physiotherapy adherence।
• Early orthopedic follow-up।
• Vitamin D deficiency/rickets/osteomalacia থাকলে correct করা।
• Malalignment early detect করলে guided growth/osteotomy timing ঠিক করা।
• Chronic NSAID abuse avoid; renal/GI monitoring।

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Overview / Summary

Multiple epiphyseal dysplasia হলো genetic cartilage/bone epiphyseal development disorder। Main presentation: childhood hip/knee pain, waddling gait, mild short stature, restricted ROM, early osteoarthritis। Diagnosis mainly clinical + characteristic X-ray + genetic panel। Treatment curative নয়; management হলো analgesia, physiotherapy, weight control, activity modification, orthopedic surveillance, deformity correction, severe OA হলে arthroplasty।

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Actionable Plan / Steps

1. Confirm suspicion: hip/knee pain + gait + height + family history assess করুন।
2. X-ray order: AP pelvis/frog lateral hip, bilateral knee AP/lateral, hands/wrist, standing long-leg alignment।
3. Exclude mimics: CBC, ESR/CRP, Ca/P/ALP, 25-OH Vit D, PTH, TSH; RF/ANA only if inflammatory signs।
4. Genetic test: skeletal dysplasia multigene panel — COMP, MATN3, COL9A1/2/3, SLC26A2, CANT1, COL2A1।
5. Start supportive care: physiotherapy + low-impact exercise + weight control।
6. Pain plan: paracetamol first; short NSAID course only if needed; PPI if GI risk; avoid chronic unsupervised NSAID।
7. Refer: pediatric orthopedic/skeletal dysplasia clinic; genetic counselling for family.

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Reference List

Textbooks

1. Nelson Textbook of Pediatrics, 22nd ed. Skeletal Dysplasias / Genetic Disorders of Bone chapter.
2. Lovell and Winter’s Pediatric Orthopaedics, latest ed. Skeletal Dysplasias and Hip/Knee Disorders chapters.
3. Tachdjian’s Pediatric Orthopaedics, latest ed. Osteochondrodysplasias / Skeletal Dysplasia chapters.
4. Robbins & Cotran Pathologic Basis of Disease, 10th ed. Genetic and developmental disorders of bone/cartilage overview.
5. Harrison’s Principles of Internal Medicine, 21st ed. Osteoarthritis and genetic skeletal disorder overview sections.

Guideline / Authoritative clinical resources

1. GeneReviews: Autosomal Dominant Multiple Epiphyseal Dysplasia, updated 2024 — diagnosis, genetic testing, management, surveillance.
2. MedlinePlus Genetics: Multiple epiphyseal dysplasia — patient-level genetic overview, inheritance, symptoms.
3. MedEx Bangladesh — Bangladesh-available brands, dose/class/side effect information for paracetamol, ibuprofen, naproxen, diclofenac, PPI, calcium/vitamin D, cholecalciferol.

Peer-reviewed DOI references

1. Jackson GC, et al. Pseudoachondroplasia and multiple epiphyseal dysplasia: A 7-year comprehensive analysis… Human Mutation. 2012;33(1):144–157. DOI: 10.1002/humu.21611.
2. Dahlqvist J, et al. Multiple epiphyseal dysplasia: a clinical and genetic study… Acta Orthopaedica. 2009. DOI: 10.3109/17453670903473032.
3. Briggs MD, et al. Multiple epiphyseal dysplasia and related disorders: molecular genetics, disease mechanisms… Developmental Dynamics. 2020. DOI: 10.1002/dvdy.221.
4. Jeong C, et al. Novel COL9A3 mutation in a family diagnosed with MED. BMC Musculoskeletal Disorders. 2014;15:371. DOI: 10.1186/1471-2474-15-371.

Md.Rafiqul Islam Lipu,Date:-18-06-2026 Thursday,Time:-11-42-12 Am