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Orthopaedic Wiki

Pigmented Villonodular Synovitis (PVNS) / Tenosynovial Giant Cell Tumor (TGCT)

Benign proliferative synovial lesion; localized or diffuse type. Common in knee (80%) and hip; presents with pain, swelling, recurrent effusion. MRI: low-signal intensity on T2 due...

Tumor | 👁 2 | 2 weeks ago

Bone Tumor Imaging — Lodwick

Lodwick classification describes patterns of bone destruction on radiographs. Type I: geographic (IA sclerotic rim, IB sharp margin, IC ill-defined). Type II: moth-eaten destructio...

Tumor | 👁 4 | 2 weeks ago

Haemophilic Arthropathy

Caused by recurrent hemarthrosis in hemophilia A/B leading to synovitis, cartilage loss, and arthritis. Target joints: knee, ankle, elbow—recurrent bleeds produce synovial hypertro...

General | 👁 3 | 2 weeks ago

Spinal Infections — Pyogenic vs TB

Pyogenic: acute pain, fever, rapid neuro deficit; disc involvement early. TB: insidious course, night sweats, cold abscess, vertebral collapse, gibbus deformity. MRI: pyogenic—disc...

Spine | 👁 4 | 2 weeks ago

Multiple Myeloma & Plasmacytoma

Most common primary malignant tumor of bone (plasma cell dyscrasia). CRAB features: hyperCalcemia, Renal failure, Anemia, Bone lesions (lytic). X‑ray: punched‑out lytic lesions, di...

Tumor | 👁 2 | 2 weeks ago

Soft Tissue Sarcoma — Enneking

Malignant tumors of mesenchymal origin; >50 histological subtypes. Enneking staging: based on grade (low/high), compartment (intra/extra), metastasis (I–III). Presentation: painles...

Tumor | 👁 3 | 2 weeks ago

Septic Arthritis — Pediatric vs Adult

Surgical emergency: cartilage can be destroyed within 24–48 hours; prompt drainage + antibiotics is critical. Children: hematogenous origin common; hip/knee frequent; Staphylococcu...

General | 👁 3 | 2 weeks ago

TB Hip

Second most common osteoarticular TB after spine; insidious monoarthritis progressing through stages. Typical deformity: flexion, adduction, external rotation; muscle spasm and nig...

General | 👁 2 | 2 weeks ago

TB Knee

Common site of osteoarticular TB after spine and hip; presents with chronic monoarthritis. Phemister triad on X‑ray: peri‑articular osteopenia, marginal erosions, gradual joint‑spa...

General | 👁 4 | 2 weeks ago

Unicompartmental Knee Arthroplasty (UKA)

Indicated in isolated medial/lateral compartment OA with intact ligaments. Advantages: smaller incision, bone preservation, faster rehab, more natural kinematics. Contraindications...

Arthroplasty | 👁 5 | 2 weeks ago

Unicompartmental Knee Arthroplasty vs High Tibial Osteotomy (HTO)

Both indicated for isolated medial compartment OA in younger active patients. HTO: joint-preserving, shifts weight-bearing axis, delays arthroplasty. UKA: joint-replacing, preserve...

Arthroplasty | 👁 3 | 2 weeks ago

ACL Reconstruction — Techniques

Gold standard for young active patients with ACL-deficient knee. Grafts: Bone–Patellar Tendon–Bone (BTB), Hamstring (STG), Quadriceps tendon, Allograft. Tunnel drilling: transtibia...

Sports | 👁 5 | 2 weeks ago