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27 Cards in this Set
- Front
- Back
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Primary differential for testicular adrenal rest tumors
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Leydig cell tumors which are less likely to be bilateral, contain Reinke crystals, have malignant potential, and do not respond to steroids (also think lymphoma,
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Primary differential for ecchordosis physaliphora
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Intradural chordoma which enhances (EP is T1IT2BNE retroclival cystic or soft tissue lesion)
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Stages of Lauge Hansen SA (Weber A) (20%)
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1: Lateral collateral ligament or LM (pull-off) fx below syndesmosis
2: Oblique (push-off) fx of MM |
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Stages of Lauge Hansen SE
(Weber B) (60%) |
1: Anterior tibiofibular ligament (Tillaux)
2: Oblique (push-off) fx of LM, at the level of syndesmosis 3: Posterior tibiofibular ligament (malleus tertius) 4: Deltoid ligament (MM) |
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Stages of Lauge Hansen PE
(Weber C) (20%) |
1: Deltoid ligament (MM)
2: Anterior tibiofibular ligament (Tillaux) 3: High transverse fx of fibula 4: Posterior tibiofibular ligament (malleus tertius) |
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5 D's of Charcot joint
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Debris
Destruction Density Dislocation Deformity |
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DS6
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Diabetes
Scleroderma Steroids Syphilis Syrinx Spinal cord Spina bifida |
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Congenital piriform aperture stenosis
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< 11 mm in term infant (overgrowth of the nasal processes of the maxilla)
Hypoplastic (triangular) hard palate with central bony ridge Central megaincisor Pituitary dysfunction Holoprosencephaly |
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Periventricular temporal cysts
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TORCH
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Periventricular calcifications
Lenticulostriate vasculopathy |
CMV
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Lethal dwarfs
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Osteogenesis Imperfecta-Type II
Thanatophoric Dwarf Achondrogenesis Conradi-Hunermann syndrome Verma-Naumoff (short rib polydactyly) |
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Thanatophoric dwarf
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Large head (frontal bossing)
Short ribs, limbs Small SI notches Flat acetabular roofs French telephone receiver femora |
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BDI
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Basion dens interval
<5 mm adults <10 mm in children |
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Powers ratio
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Basion- posterior arch C1
ant arch C1 - opisthion < 1 |
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AOI
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atlanto-occipital interval
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CHAOS
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congenital high airway obstruction sequence
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Elbow fat pad in children
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Supracondylar fracture (60%)
Lateral condyle (15%) Separation of medial epicondyle (10%) |
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Elbow fat pad in adults
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Radial head fracture (50%)
Olecranon fracture (20%) Fracture +/- dislocation (15%) |
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Fluid-fluid level
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SBC
ABC Chondroblastoma GCT Telangectatic osteosarcoma |
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Superficial siderosis
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Ataxia, dysarthria, hearing loss
Trauma: cervical root avulsions Neoplasms: oligodendroglioma, ependymoma, astrocytoma Vascular: AVM, aneurysms, fragile capillary re-growth after sx |
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Heel pad sign
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Acromegaly
Greater than 23 mm |
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Systemic oxalosis
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Cause of both cortical and medullary calcinosis
Abnml density of bones, cartilage, vasculature Metaphyseal widening, target sign in epiphyses, sclerotic metaphyseal bands |
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Short 4th metacarpal
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Pseudohypoparathyroidism
Pseudopseudohypoparathyroidism Idiopathic Trauma Turner's Trisomy 13-18 |
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Chorionic bump
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- Rare
- Avascular echogenic mass (hematoma?) along the placental surface (bulging into gestational sac) - Associated with partial mole and spontaneous AB (Risk increased 2x c/w infertility and 4x c/w gen pop) - Prognosis unchanged if multiple |
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periosteal vs parosteal osteosarcoma
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◦PERI osteal osteosarcoma: DIAphyseal = less joint involvement, but more anaplasia
◦PAR osteal osteosarcoma: METAphyseal = more joint involvement, less anaplasia |
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Stress fractures
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Femoral Neck
Tibia (>50%) Fibula (10%) Navicular Second Metatarsal (25%) |
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Reversible focal splenial lesion
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Viral encephalitis
Anti-epileptic drug toxicity or withdrawal Hypoglycemia |
