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142 Cards in this Set

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