MSK Flashcards
Multiple lytic lesions
Mets - thyroid, renal, lung, breast
Multiple myeloma
Lymphoma
LCH - beveled edge, button sequestrum, vertebra plane
Fibrous dysplasia
Chronic recurrent multifocal osteomyelitis –> paeds
Sequestrum
Osteomyelitis
LCH
Osteoid osteoma
Periosteal Reaction in Newborn/Infant
Physiological
Trauma
Infection
Prostaglandin therapy
Infantile cortical hyperostosis
Rugger-Jersey Spine
Renal osteodystrophy - smudgy margins
Osteopetrosis - sharp margin - SANDWICH SIGN
Paget disease - PICTURE FRAME
Bilateral Symmetrical Sacroiliitis
Ankylosing spondylitis
Inflammatory bowel disease
Rheumatoid arthritis
Unilateral / Asymmetrical Sacroiliitis
Psoariatic arthritis
Reactive arthritis
Septic arthritis
Proximal Arthropathy - MCP joints
RA - osteopenia, erosions
CPPD - chondrocalcinosis, NO erosions
Gout - erosions with sclerotic borders and overhanging edges
SLE - osteopenia, subluxations, dislocations, NO erosions
Haemochromatosis - subchondral cysts, hooked osteophytes
Distal Arthropathy - IP joints
Osteoarthritis - DIP & PIP
Erosive osteoarthritis - DIP & PIP
Psoriatic arthritis - DIP & PIP - ray involvement, bone proliferation - pencil in cup deformity
Reactive arthritis - PIP - erosion, bone proliferation
RA - periarticular osteopenia, erosions
Erosive Arthropathy - Foot
RA
Gout
Reactive arthritis
Psoriatic arthritis
Distal clavicle erosion
Traumatic
RA
Hyperparathyroidism - ass w/ sub ligamentous resorption at the site of the coracoclavicular ligament
Scleroderma
Infection
Vertebra plana
Adult:
Multiple myeloma
Metastasis
Trauma
Child:
LCH
Lymphoma
Osteomyelitis - bacterial vs TB
Wormian bones
Idiopathic
Osteogenesis imperfecta
Cleidocranial dysostosis
Down’s syndrome
Metabolic disease
Madelung Deformity - triangular configuration of the distal radius and ulna articulation with wedging of the proximal carpal bones
Idiopathic
Trauma
Infection
Skeletal dysplasia - Turner’s syndrome, Ollier disease, multiple epiphyseal dysplasia, multiple hereditary exostosis
Osseous Lesion with Fluid-fluid levels
ABC
Unicameral/simple bone cyst
Telangiectatic osteosarcoma - nodularity along separations
Fibrous Dysplasia
Chondroblastoma
Avascular Necrosis (VIVA Book)
Ulcerative colitis –> stoma bag
NSAIDS –> Ankylosing spondylitis –> dagger sign & ass papillary necrosis cals
Steroids –> renal transplant clips/ erected transplant calcs
Splenomegaly –> myelofibrosis & gaucher (latter also gives H vertebrae)
Chronic pancreatitis –> pancreatic calcs
Sickle cell disease –> cholecystectomy/gallstones, small calcified spleen, H shaped vertebrae
Acro-osteolysis
Hyperparathyroidism
Scleroderma - bone erosions, soft tissue resorption along the distal phalanges
Trauma
Psoriasis - soft tissue swelling, periarticular erosions, fluffy periostitis, resorption of distal phalanges
Hajdu-Cheney Syndrome
Medullary/chondroid lesion
Enchondroma
Bone infarct - Serpentine rim of calcification ; internal high T1 (fat)
Chondrosarcoma - esp of size >6cm, rapid growth, cortical breakthrough, deep endosteal scalloping, pain
Chronic osteomyelitis - internal low T1
Diffusely increased bone density
Metabolic disorders -> renal osteodystrophy, primary hyperparathyroidism, fluorosis
Osteoblastic metastasis -> prostate, breast, pancreas, GI mucinous adenocarcinoma, TCC, carcinoid, lymphoma, medulloblastoma, neuroblastoma
Haematological disorders -> myelofibrosis, mastocytosis, sickle cell anaemia
Paget’s disease
Osteoporosis
Loose bodies
Synovial osteochondromatosis
Pigmented villonodular synovitis -> low T1 and T2, blooming artefact
Rice bodies
Expansile rib lesion in a CHILD
Fibrous dysplasia
Bone cyst -> unicameral or aneurysmal
Enchondroma
LCH
Ewing sarcoma
Mets
Posterior element lytic lesion
ABC -> pedicle
Osteoblastoma
Infection -> TB (esp if thoracic with paraspinal abscess and sparring of the intervertebral discs)
Metastasis
LCH
Ivory vertebral body
Osteoblastic metastasis - ADULT breast/prostate ; CHILD neuroblastoma/medulloblastoma
Paget disease
Lymphoma
Mastocytosis
Myeloma - POEMS syndrome
Periarticular soft tissue calcifications
Calcinosis of renal failure
Myositis ossificans -> sec. to trauma/immobility, central lucency with a zone of mature ossification at the periphery
Arthropathy with calcified soft tissue nodule
Scleroderma
Soft tissue sarcoma -> reverse zoning, central calcs
Tumoral calcinosis
Benign expansile lytic lesion
Fibrous dysplasia -> thick rind of reactive bone
Unicameral bone cyst
Aneurysmal bone cyst
Giant cell tumour
Eosinophilic granuloma
Multiple sclerotic foci in the pelvis
Osteopoikilosis –> Voorhoeve syndrome –> osteopathia striata, melorhheostosis
Metastatic disease
Paget disease
Vertebral body wedge fracture
Traumatic fracture
Insufficiency fracture –> marrow oedema limited to vertebra; smooth and rim shaped soft tissue
Pathological fracture –> abnormal marrow with ill-defined margin; abnormal marrow extends to pedicles, irregular ass soft tissue; marked enhancement
Raindrop Skull
Multiple, well-defined lytic lesions of various size scattered throughout the skull
Multiple Myeloma
Ochronosis (Alkaptunuria)
- severe osteoporosis
- multilevel intervertebral disc calcification and disc space narrowing
Epiphyseal Lucent lesion
Chondroblastoma
GCT
LCH
Intraosseous ganglion cyst
