De Quervain Tenosynovitis
Recurrent Lateral Patellar Dislocation
Proximal Myopathy and Creatine Kinase
Rotator Cuff Disease and Subacromial Impingement
Scoliosis
Thoracic Outlet Syndrome: Neurogenic, Venous & Arterial
Seronegative Spondyloarthropathies: The 4 Compared
The Big 5 Autoimmune Diseases
Forearm Flexors & FDS Injury
FDS vs FDP, PIP vs DIP, Camper's chiasma, nerve supply split. Clinical testing simulator, drag-and-drop nerve matching, interactive forearm cross-section diagram, 10-question quiz pool.
Spondylitis, Spondylosis, Spondylolysis & Spondylolisthesis
Spondylitis. Spondylosis. Spondylolysis. Spondylolisthesis. They share the same root and nothing else. One inflames. One ages. One fractures. One slips. By the end of this page you will never mix them up again.
Adult Heel and Forefoot Pain: Plantar, Morton, Flatfoot, and the Bunion 🔒
Plantar fasciitis, Morton neuroma, PTTD flatfoot, Achilles tendinopathy, and bunion: the first-step stab to the third-webspace burn, with one-screen discriminators.
Anterior Knee Pain: Patella, Bump, Cyst, and the Extensor Gap 🔒
One screen for the front of the knee: patellofemoral pain, Osgood-Schlatter bumps, Baker cysts that fake a DVT, and the extensor gap needing the OR.
Bone Physiology and the RANKL Axis: The Cells, the Levers, and the Markers 🔒
The builder expresses RANKL, the eater expresses RANK, and OPG is the decoy: bone cells, the RANKL axis, Wolff
Bone Tumors: Osteosarcoma, Ewing, and the Pattern Recognition Matrix 🔒
The 12-tumor bone matrix: split osteosarcoma, Ewing sarcoma, giant cell tumor, myeloma, and the bone cysts by age, bone zone, and radiograph pattern.
Diabetic Foot and Charcot Arthropathy: The Hot Red Foot and the Amputation Clock 🔒
Hot red painless foot in a neuropathic diabetic is Charcot until proven otherwise. Wagner grades, the osteomyelitis workup, ABI traps, and the amputation clock.
Fibromyalgia and CRPS Discriminator: Widespread Pain Versus the Post-Traumatic Fire 🔒
Widespread pain with a normal exam is fibromyalgia; focal post-traumatic burning with autonomic change is CRPS. WPI and SSS, Budapest criteria, treatment ladders.
Fractures and Trauma: Eponyms, Growth Plates, and the Salvage Clock 🔒
Mechanism names the fracture: dinner fork, snuffbox, and the child who will not move the arm. Eponyms, growth plates, and the salvage clock.
Gout vs Pseudogout: The Crystal Split 🔒
Needle-shaped negative crystals are gout; rhomboid positive crystals are pseudogout. Read the polarized field, treat the flare within hours.
Hand, Wrist, and Elbow: The Ambulatory Soft-Tissue Lineup 🔒
Tennis elbow to trigger finger to Dupuytren: the tendon that hurts, the test that proves it, and the injuries that always go to the operating room.
Hereditary Bone and Cartilage Disorders: OI, Osteopetrosis, Achondroplasia, MPS, Rickets 🔒
One gene, one skeletal signature, one complication to screen. OI, osteopetrosis, achondroplasia, MPS, rickets variants, and the bone tumor syndromes, board-first.
Limb Compartments and the Brachial Plexus: The Compartment-Nerve-Movement Chain 🔒
Name the nerve inside the compartment and read the lost movement before the fasciotomy clock runs out. Erb versus Klumpke, Horner, and delta P, board-first.
Metabolic Bone Trio: Osteoporosis vs Osteomalacia vs Paget 🔒
Split osteoporosis, osteomalacia/rickets, and Paget disease by calcium, phosphate, ALP, vitamin D, and PTH. DXA T-scores, Looser zones, mosaic bone, and the ladder.
MG vs LEMS vs Botulism: The Neuromuscular Junction Discriminator 🔒
Fatigable or facilitating? MG, LEMS, and botulism at the neuromuscular junction: ice test, decrement versus increment, crisis split, and the drugs that worsen MG.
MSK Infections: Septic Arthritis, Osteomyelitis, and the Destruction Clock 🔒
Hot joint plus fever is septic until proven otherwise. Septic arthritis, osteomyelitis, necrotizing fasciitis, Pott disease, PJI, puncture wounds.
OA vs RA vs JIA: The Inflammatory Split 🔒
Where, how long, and what the film and blood say: distribution, the stiffness clock, and serology split osteoarthritis, rheumatoid arthritis, and JIA.
Pediatric Hip and Foot: DDH, Clubfoot, and the Limping Child 🔒
Newborn hip clunks, clubfoot CAVE, and the limping child: Barlow versus Ortolani, ultrasound at 6 weeks, Pavlik, Ponseti, Kocher, Perthes, and SCFE.
PMR and Giant Cell Arteritis: The Age Gate and the Vision Clock 🔒
Girdle stiffness over 45 minutes after age 50 is PMR. A new headache, jaw claudication, or vision loss is giant cell arteritis, and steroids come before the biopsy.
Soft-Tissue Trauma: Shoulder and Hip Dislocations, Knee and Ankle Ligament Injuries 🔒
Read the limb, name the nerve at risk, and know the clock: shoulder and hip dislocations, ACL tears, ankle sprains, and the Ottawa rules.
The Lateral Hip: Bursa, Tendon, Pinch, and Snap 🔒
Side-of-hip pain is never just bursitis: the trochanteric trio, FAI in the young athlete, the snapping hip, the IT band, piriformis, and the red flags.
The Myopathies: Pattern, Biopsy, and the CK 🔒
Proximal weakness names the shortlist; the CK and the biopsy close it. Polymyositis, dermatomyositis, IBM, the dystrophies, and rhabdomyolysis, board-first.
The Nerve Palsy Localizer: Median, Radial, Ulnar, Peroneal, and the Brachial Plexus 🔒
Localize nerve palsies the way boards grade: movement, sensation, reflex, mechanism. Median tunnel, radial wrist drop, ulnar claw, Erb, Klumpke, peroneal foot drop.
The Shoulder Beyond the Cuff: Frozen, Separated, and the Axillary Trap 🔒
Frozen shoulder, AC separation, proximal humerus fracture, and biceps rupture: the exam findings that separate the shoulder beyond the cuff.