Fractures, Osteonecrosis, Osteomyelitis Flashcards
Describe this fracture
Simple/closed complete
Describe this bad boy
Compound (out of skin/bacterial route) + complex (damage to surrounding tissue)
The hazy material surrounding this fracture several days after the traumatic event contains:
New blood vessels + fibroblasts + osteocytes
(Not too sure about timeline for osteocytes but this looks like it may contain woven bone??)
What would you expect to see on histology of this lesion?
Caseating granulomas
(Pott disease = TB in vertebral bodies)
Name five conditions associated with the finding of the left hip.
Sickle cell disease, alcoholism, steroid use, caisson disease (decompression), fracture/dislocation of femoral neck
(Osteonecrosis of femoral head)
This fracture seen in a 90 year old woman is most likely an example of:
Pathologic fracture
(Vertebral crush fractures are most common fracture in osteoporosis)
These X rays were taken 4 months after a kid fell from a tree. Dx?
Fibrous nonunion
(Note the wide gap between the bone; pieces of bone weren’t closely enough aligned for complete healing)
Most common fracture in kids?
Greenstick - simple incomplete fracture of long bone
A patient with this finding is at increased risk for osteomyelitis due to:
Salmonella
(Bone marrow > 50% cellularity = classic of SCD)
When will this lesion occur?
10-90 days after direct sexual contact with infectious syphilis lesion
Dx?
Congenital syphilis
(Saber shin - anterior deformity of tibia)
What causes this finding in diabetics?
Small vessel disease
(Osteonecrosis of toes)
Dx? Sx associated?
Tertiary syphilis
Neuropathic joint disease, neurosyphilis, CV syphilis
(This is a gumma - soft, tumor-like granuloma)
Which arrow points to sequestrum? Which to involucrum?
White = sequestrum = necrotic old bome
Black = involucrum = reactive new cortex
What dis?
Comminuted fracture
(Several pieces)
3 months after an MVA, the hazy material around this healing fracture contains:
New blood vessels + fibroblasts + osteocytes + cartilage
What lesions would you expect in a syphilis patient at his most contagious stage?
Conylomata lata (see pic; flat,broad, white lesion in moist areas) and rash on trunk, extremities, palms, and soles
(Secondary syphilis is most contagious)
Cause?
Multiple infarcts/old cortex within new cortex
(Bone-within-bone appearance)
This pt is at risk for:
SCC
(Draining sinus tract from osteonecrosis of the jaw)
Which cell type will be characteristically absent during this process?
Lymphocytes
(Osteonecrosis - note empty lacunae; PMNs are predominate cells of osteonecrosis)
Organism?
Treponema pallidum
