Radiology Live Unit 2 Flashcards
Most sensitive modality for early calcific tendinopathy
Ultrasound
Complete discoid lateral meniscus MRI
Meniscal width >15mm on coronal
Pathological vs benign fracture lines
Benign is straight, pathological often irregular
Close approximation of adjacent spinous processes with sclerosis and flattening of opposing surfaces
Baastrup disease
FDG uptake in Giant cell tumour
Moderate, SUV max 4-7
Multiple areas of increased bone uptake, young pt with chronic bone pain
Polyostotic fibrous dysplasia
Immune mediated necrotising myopathy vs inclusion body myositis
Diffuse, symmetric muscle oedema vs asymmetric
Diminished ankle reflex - nerve affected
S1
Weak great toe extension nerve affected
L5
Vertebral bodies in Morquio
Anterior beaking and platyspondyly
Tennis racket appearance
Straight septa crossing the lesion, typical of odontogenic myxoma
Commonest accessory ossicle adjacent to navicular tuberosity
Os tibiale externum
OPG shows severe periodontal bone loss and missing teeth, next step
CT
Useful additional measurement to TT-TG distance in determining surgical need
Lateral trochlear inclination angle
Diagnostic criteria for Scheuermann disease
Anterior wedging of >5 degrees in at least 3 adjacent vertebrae
Widening and irregularity of metaphyseal regions
Diaphyseal aclasia
Increased TT-TG distance associated with
Lateral patellar maltracking
New osteoporosis diagnosis, next step
X-ray to rule out fractures
Enchondroma MRI appearance
Lobulated high T2 lesions with foci of low signal intensity
Chalkstick fracture typical appearance
Transverse fracture line through all 3 vertebral collumns
Squared off iliac wings
Achondroplasia
Honda sign, not sacral insufficiency fractures
Tarlov cysts
Fluid collection in cellulitis on CT
-10 to 20HU
metastatic lesions vs stress fractures on MRI spine
Mets can involve posterior elements
Commonest primaries to metastasize to spine
Prostate, breast, lung, renal, thyroid
Prognosis of Kohler disease
Spontaneous resolution
Most reliable indicator of haemophillic arthropathy severity
Degree of joint space narrowing
Pilomatricoma vs sebaceous cyst
Internal calcifications
