DDx Flashcards
Tibiotalar slant
Trauma, Infx, JRA, hemophilia, Sickle Cell, Epiph/Metaph dysplasia, NF1, FD, HME
Bilat Symm sacroilitis
AS, PsA, ReactiveA, OCI, HyperPT, Gout, OA
Bilat Asymm sacroiliitis
PsA, ReactiveA, Gout, OA
Unilat sacroiliitis
PsA, Reactive, RA, Gout, OA, Infx
Tumoral calcinosis
PSS, Renal Osteodystrophy, Milk-Alkali, HyperVitD
Tuft resorption
PSS, HyperPT, Thermal inj (burn/frostbite), CollVascDz, PsA, Epidermolysis bollosa, PVC exp, Hadju-Cheney
Band like resorption
Familial osteolysis, occupational osteolysis, CollVascDz, HyperPT
Deforming Non-Erosive Arthropathy
Rheumatic Fever, CollVasc Dz (SLE), RA, agammaglobulinemia, Ehlers-Danlos
Disc Ca2+
Ochronosis, hemochromatosis, CPPD, HyperPT, polio, acromegaly, amyloid, surgical fusion, AS, JCA
DISH
postop heterotopic oss, acromegaly, AS, HyperVitA, Ochronosis, Fluorosis, HypoPT
Gout
Sarcoid, amyloid, xanthomatosis
Chondrocalcinosis
WHIPADOG: Wilsons, HyperPT, Idiopathic, Pyrophosphate arthropathy, Acromegaly/Amyloid, Diabetes , Ochronosis, Gout
Metastatic Ca2+
Renal osteodystrophy, HyperPT, Sarcoid, HyperVitD, Milk-Alkali
PeriArt Ca2+
calcific tendinosis/bursitis, CollVascDz, HyperPT, Renal osteodystrophy, HypoPT, Hyper VitD, Milk-Alkali, Idiopathic tumoral calcinosis, Articular disorders(gout, infx, CPPD) Sarcoid
Rib Notching
RA, SLE, PSS, NF1, aortic coarctation
Regional osteoporosis
Immobilization, disuse, RSDS/CRPS, transient reg. osteoporosis, transient osteoporosis of hip, regional migratory osteoporosis, transient bone marrow edema
Post scalloped vert body
inc. intraspinal pressure(neoplasm, cyst, syrinx, hydrocephalus), dural ectasia (marfan, ED, NF1), Bone resorption (acromegaly), Congenital (achondroplasia, Morquio, Hurler), Physiologic scalloping
Neuropathic joint
syphilis, syrinx, meningomyelocele, trauma, MS, Charcot-Marie Tooth, vascular, cord comp, DM, alcoholism, infx, pernicious, steroids, congenital indifference to pain
Bony fragment
AVN, post-traumatic OA, intra-art steroids, neglected infx, ochronosis
Acral osteolysis
CollVascDz, epidermolysis bullosa, neuropathic, HyperPT, sarcoid, PsA
Metaphyseal lines
stress lines, heavy metal, leukemia, rickets, scurvy, Hypothyroidism, HypoPT, Hypervitaminoses, transplacental (TORCH) infx
Metaphyseal flaring
lead poisoning, anemias, storage disorders, congenital syndromes, normal variant
H-shaped vert
SCA, Thalassemia, Gaucher, congenital, hereditary spherocytosis, osteoporosis
Widespread osteolysis
Macroglobulinemia, leukemia, histiocytosis, Gaucher, Vascular tumors, Infx, FD, HyperPT, Pancreatitis,
Diffuse sclerosis
Osteoblastic mets, SCA, Paget, FD, lymphoma, mastocytosis, tuberous sclerosis, renal osteodystrophy, sarcoidosis
Erlenmeyer Flask
Gaucher, Niemann-Pick, Anemia, FD, Metaphyseal dysplasia (Pyle’s), osteopetrosis, heavy metal (lead)
Demineralizing arthritis
Hemophilia, osteomyelitis, RA, Reiter/reactive, Scleroderma, Erythomatosis (HORSE)
Carpal erosions
Gout, CRPS, RA, Trauma
Protrusio acetabuli
MyPROTRUSIO: Marfan, Paget/Psoriatic/Primary, RA, Osteogenesis imperfecta, Trauma/Tumor, Rickets, Unkn (idiopathic), Sickle cell anemia (rare), Inflammatory arthritis, Osteomalacia
