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142 Cards in this Set
- Front
- Back
Retroperitoneal mass
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Malignant fibrous histiocytoma
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MC tumor postirridation
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Malignant fibrous histiocytoma
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Aponeurosis of ant abdominal wall
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Desmoid tumor (deep seated fibromatosis)
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Rhabdomyosarcomas occur in?
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Children
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Tumor of uterus or GI tract?
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Leiomyosarcoma
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needle shape crystals + negative bifiringence + warm, painful joint
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Gout
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Chemo drugs precipitate?
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Secondary gout
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Osteoclasts in fracture do what?
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Accelerated resorption because of blast stimulation
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Sclerotic, thick bone + HIGH ALP
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Paget
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Two phases of Paget's
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Lytic; Burnt out phase
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Vitamin D deficiency (severe)
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Osteomalacia
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Primary hyperparathyroidism causes?
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Osteitis fibrosa cystica
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Tumor projection capped by cartilage
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Osteochondroma
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symmetric arthritis + hands/feet + swollen,warm joints + swan neck + ulnar deviation
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RA
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Chronic arthritis + cartilage destruction + large joints
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Lyme
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Calcium pyrophosphate crystal deposition
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Pseudogout
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Larger hat + joint pain + narrow joint spaces + sclerosis + mosaic pattern
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Pagets
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Pagets increased risk for?
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Osteosarcoma
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Young age + focal developmental defect of bone
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Fibrous dysplasia
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Mass in lateral neck in kid + no pain
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Rhabdomyosarcoma
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Vimentin marker?
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Rhabdomyosarcoma
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Solid soft tissue mass + trauma
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Nodular fasciitis\
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Location/ age of nodular faciitis?
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Young adults, trunk and UE's
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Malignant fibrous histiocytoma found in?
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Older adults
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Contusion leads to?
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Abscess formation
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Deforming lesion of fascial planes + long time period
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Superficial fibromatosis
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Common benign soft-tissue tumor
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Lipoma
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Urethritis + knee pain + warm + diplococci in aspirate
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Gonorrhea (acute suppurative arthrits)
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Mimiks RA?
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Lyme
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Chancre + arthrits years later
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Syphillis
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MCC of osteomylitis
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Aureus
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Cause of osteomyelitis in children
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H. Influenzae (gram neg rod)
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Dexa -2.5 + femoral neck fracture
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Osteoporosis
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Decoy receptor for RANK?
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Osteoprotegrin (OPG)
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Estrogen deficiency causes what?
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Increased IL-1, IL-6, and TNFa
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Alderonate
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Reduces bone resorption
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Pain in thigh + soft tissue mass + adult male
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Liposarcoma
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FGF3 mutations
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Dwarfism syndromes
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Age of osteosarcoma
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<20yrs males
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Location of origin of osteosarcoma?
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Metaphysis
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Reactive fibroblastic lesion of young adults
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Nodular fasciitis\
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Tumor of head, neck, GU tract, retoroperitoneum in children
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Rhabdomyosarcoma
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Small, circumscribed lesions on skin in extremities + adults
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Hemangiomas
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man + pain in knee + mass superior & inferior to patella + biphasic spindle cells + epithelial glands + X;18 translocation
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Synovial sarcoma
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Origin of synovial sarcoma
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Mesenchymal cells
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Fibromatosis of fibroblast + collagen
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Desmoid tumor (deep seated fibromatosis)
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ONLY EPIPHSYEAL TUMOR
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Giant cell tumor
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R femoral intertronchanteric fracture
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Osteoporosis in postmenopausal woman
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MC form of monoclonal gammopathy
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Multiple Myeloma
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Lytic lesions in vertebrae that cause compression fractuers
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Multiple Myeloma
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man + pain in knee/back/5th finger/neck + stiffness in AM + pain worse at END of day
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Osteoarthritis
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Shigella + gastroenteritis + low back pain + red eye/blurred vision
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Enteropathic arthritis
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HLA-B27
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Anky; Reiter; Psoriatic; enteropathic
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Reiter syndrome caused by?
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Chlamydia
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draning sinus tract after fracture
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Chronic osteomyelitis
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Dead piece of bone
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Sequestrum
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Shell of reactive new bone
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Involcrum
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MC lesion to develop in a sinus tract from osteomyelitis
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Squamous cell carcinoma
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Nidus + surrounding sclerosis
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Osteoid Osteoma
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upper femoral mass + older male + metaphyseal origin
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Chondrosarcoma
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Gray-blue glistening mass in medullary cavity
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Chondrosarcoma
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Location of most chondrosarcomas
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Central portions of skeleton
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Derivation of osteosarcoma
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Osteoblasts
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Large, red-brown cystic tumors + 3-5th decades
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Giant cell tumor
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Derivation of Giant Cell Tumor
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Osteoclasts
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Tumor of primitive neuroectodermal cells
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Location
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Multiple dark red, round, lytic lesions
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Multiple Myeloma
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Small, round blue cells
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Ewing sarcoma
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Developmental arrest of bone + irregular woven bone spicules + fibroblastic stroma
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Fibrous dysplasia
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young male + knee pain + metaphysea origin + elevated periosteum + spindle cells forming osteoid matrix
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Osteosarcoma
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pain below patella + cystic area at tibial diaphysis + inc osteoblasts
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PTH adenoma
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Brown tumor of bone
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PTH adenoma
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PTH adenoma vs giant cell
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PTH = fibroblasts; Giant cell = epiphysis + plump stromal cells
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male child + hip pain + swelling + osteolysis + cortical erosion + metaphysis + adjacent soft tussue swelling + abscess
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Pyogenic osteomyelitis = staph
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Neonatal osteomyelitis
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GBS; H influenzae
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Sickle cell osteomyelitis
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Salmonella
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Sexually active + osteomyelitis
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Gonorrhea
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female + contracture of 3rd digit + firm, hard area under palm
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Dupuytren (superficial fibromatosis)
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RA is a?
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Synovitis
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ASA relieves pain + young girl + knee pain at night + rim of bony sclerosis at proximal tibia + cortex
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Osteoid osteoma
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ASA does not releive pain in?
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Osteoblastoma (>2cm)
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young male + knee pain + broad-based excrescense from metaphyseal region
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Osteochondroma
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teen male + mass in diaphyseal region + extends to soft tissue + reactive bone cover + close packed primitive cells with scant cytoplasm + 11;22 translocation
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Ewing sarcoma
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Subcutaneous RA nodules found over?
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Extensor surfaces
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RA treatment?
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Adalimumab
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Gummatous necrosis in joints
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Syphillis
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Benign tumor of hyaline cartilage in medullary space + young males
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Enchondroma
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Location of Ewing?
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Diaphysis
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Mimiks osteomyelitis
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Ewing sarcoma
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Soap bubble X-ray
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Giant cell
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Exostosis
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Osteochondroma
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MC malignant bone tumors in kids
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Osteosarcoma & Ewing
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PNET related to
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Ewing sarcoma
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MC bone tumor in adults
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Metastatic carcinoma
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EWS-FLI1 fusion gene
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Ewing sarcoma
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Focal lytic lesion + plasma cells
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Plasmacytoma
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Associated with alcohol
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Gout
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Chalky white deposits beneath ulcerated skin
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Tophi
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Mechanism of gout
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Neutrophils phagocytize urate crystals
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Hypercholesterolemia causes?
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Xanthomas in tendons
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Granulomatous inflammation + arthritis + skin lesions
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TB
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Best way to reduce fractures after menopause?
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Excersize regimen
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Pathological fracture + femoral diaphysis + central lucency + thin sclerotic rim + intramedullary + trabeculae of woven bone in fiborblastic proliferaiton
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Single focus of fibrous dysplasia
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Arthritis + bony erosion + lymphoplasmacytic infiltrate + arteritis w endothelial proliferation
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Lyme (stage 3)
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sliver skin lesions + arthritis
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Psoriasis
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Cause of psoriatic arthritis?
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Epidermal hyperkeratosis, parakeratosis, elongation of rete ridges, microabscesses
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Soft tissue mass with yellow cut surface
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Lipoma
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Sex in giant cell?
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Female
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Osteoblastoma involves?
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Spine
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Small tumors of small bones of hands and feet?
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Endochondromas
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Compression fractures of spine + abscess of muscle
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TB
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Rash across nose & hands + arthritis + inc lymphs
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Juvenile Rheumatoid Arthritis
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Charcot joint
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Syphillis
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inc neutrophils + arthritis + swollen + CHF/DBM/Hepatic cirrhosis
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Hemachromatosis causing a pseudogout
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Tender/swollen DIP joints
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Osteoarthritis
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soft tissue mass that calcifies into bone (within muscle)
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Myositis ossificans
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Stillborn + osteopenia + fractures
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Osteogeneisis Imperfecta
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What variant of OI is lethal
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Type II
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ANA + dsDNA positive + proliferative glomerulonephirtis + steorid therapy
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Patient has SLE steroids can cause avascular necrosis
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Radiolucency + density of femoral head with flattening of bone
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Avascular necrosis
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Avascular necrosis associations
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Steroids, sickle cell, fracure, barotrauma, hypercoaguable states, hyperlipidemia
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Bump on dorsum of wrist + pain + mucoid fluid
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Ganglion cyst
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Diffuse form of giant-cell tumor of tendon sheath
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Villonodular synovitis
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BL hearing loss + yellow-brown teeth + bell shaped teeth + steel-gray (blue) sclera + fractures
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Osteogenesis imperfecta type I
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Short + bow-legged child
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Acondroplasia
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Homozygous form of acrondroplasia?
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Thanatrophoric dysplasia (lethal dwarfism)
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Growth retardation + mental retardation + hepatosplenomegaly + joint stiffness
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Mucopolysaccharidosis I (Hurler syndrome)
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fractures + hepatosplenomegaly + CN palsies + pancytopenia + sclerotic bones
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Osteopetrosis (Albers-Schonberg disease)
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MC sites for firbrous dysplasia?
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Ribs, femur, tibia, mandible, calvaria
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Garner polyposis associated with?
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Osteoma
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Fibrious dysplasia + cafe-au-lait spots + endocrinopathies
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McCune-Albright syndrome
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Locations for polyostotic fibrous dysplasias?
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Craniofacial, pelvic, shoulder girdle
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McCune-Albright syndrome occurs in?
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young girls
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Defect in collagen 1 formation
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Osteogenesis imperfecta
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EXT mutations seen in?
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Osteochondromas
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HGPRT in?
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X-linked Lesch-Nyhan syndrome
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RB mutation
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Osteosarcoma
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No vitamin D
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Rickets
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No vitamin C
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Scurvy
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Mutation in carbonic anyhydrase?
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Osteopetrosis (Albers-Schonberg disease)
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Why are people deaf in osteopetrosis?
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Ossicles deformed
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Erlenmeyer flask deformitiy - bone in bone
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Osteopetrosis (Albers-Schonberg disease)
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