Musculoskeletal imaging Flashcards
Multiple lytic lesions
Metastases Myeloma LCH Lymphoma FD CRMO/SAPHO ?HLAB27/?p.acnes ( I confuse this with transient osteoporosis of the hip)
Sequestrum
EFILM EG Fibrosarcoma Infection Lymphoma Malignant fibrous histiocytoma (PUS) mimic: osteoid osteoma
Newborn with periosteal reaction
Physiologic: medial tibia, 1-6 months, bilateral, diaphyseal
Caffey: bearded infant - mandible, clavicles and long bones, systemic symptoms, self limiting by 6-9/12
Antenatal TORCH infection e.g. wimberger corner in syphilis, celery stalk in congenital syphilis/CMV/rubella
Prostaglandin treatment
(also Neuroblastoma mets, LCH, NAI)
Rugger Jersey spine
renal osteodystrophy/hyperparathyroidism
Differentials:
Picture frame: pagets
Sandwich: osteopetrosis
Ivory:
Lymphoma, Infecion (Tb), met/myeloma, Pagets
Osteoblastic mets: ewings/medulloblastoma/neuroblastoma, prostate/breast
Sacroiliitis
Psoriatic arthritis and reiters are asymmetric or symmetric
ankylosing spondylitis and IBD related arthropathy are symmetric
If symmetric also consider RA
If asymmetric consider OA and gout
If unilateral consider infection
mimic: osteitis condensans ilii
MCPJ arthropathy
Rheumatoid CPPD Haemochromatosis Gout SLE
IPJ arthropathy
Erosive OA
Psoriatic arthropathy
OA
Reactive arthritis
Rheumatoid arthritis
“licked candy” leprosy/psoriatic/neuropathic/rheumatoid
Erosive arthropathy of foot
Gout
Rheumatoid
Reactive/psoriatic
Distal clavicle erosion
SHIRT
Scleroderma Hyperparathyroidism: also erosion CC insertion Infection Rheumatoid Trauma: stress osteolysis
Mets/myeloma
Vertebra planar
infection (Tb) Mets/myeloma EG Lymphoma/leukaemia Trauma
Wormain bones
OI
cleidocranial dysostosis
T21
Metabolic: hypothyroid/rickets
Madelung
Idiopathic
Turners, Ollier, multiple hereditary exostoses
Post-traumatic: gymnasts
Osseous lesion with fluid fluid levels
ABC
Telangectatic osteosarcoma
Chondroid lesion
enchondroma
chondrosarcoma
bone infarct
Acro-osteolysis
Psoriasis Injury - hypothermia or burns Neuropathic - diabetes and leprosy CVD- scleroderma Hyperparathyroidism Familial - Hajdu Cheney Other: PVC
Band: CHFO only
Diffusely increased bone density
Mets Metabolic: renal osteodystrophy/fluoride Myelofibrosis Mastocytosis Ostepetrosis Pagets
Loose bodies
Rice bodies
Lipoma aborescens
PVNS
osteochondromatosis
Rib lesion
FAME
FD
ABC
Met/myeloma
Ewings/EG/Enchondroma
Posterior element lytic lesion
ABC Osteoblastoma/osteoid osteoma Infection (Tb) Met LCH
Vertebral lesion: non neoplastic: ABC/heamangioma Metastasis Primary: myeloma/plasmacytoma osteoid osteoma/osteoblastoma chordoma chondrosarcoma/osteosarcoma ewings lymphoma GCT LCH
Classic for PE: ABC/osteoid osteoma/osteoblastoma
Ivory vertebral body
Lymphoma
Infection - Tb
Met: NB/MB/breast/prostate
Pagets
Periarticular soft tissue calcifications
Gout Myositis ossificans Metastatic calcification in renal failure Tumoral calcinosis Scleroderma soft tissue sarcoma
Calcinosis Universalis:
SLE/scleroderma/polymyositis/dermatomyositis
Benign expansile lytic lesion
SBC/ABC
GCT
FD
EG
Multiple sclerotic foci (in Pelvis)
Mets
osteopoikilosis
pagets
Vertebral body wedge fracture
trauma
Insufficiency
pathologic - abnormal signal ill defined, extends into posterior elements, enhances, soft tissue lesion
Epiphyseal lucent lesion
ABC
Infection
GCT
Chondroblastoma (Clear cell chondrosarcoma)
