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34 Cards in this Set

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DISEASES OF BONES

BONES PART 1
DISEASES OF BONES
BONES PART 1
The periosteum is?

the endosteum is?
1. dense outer connect tissue layer
2. lining the medullary cavity
woven bone is?
haphazard arrangement of lamellae with incr of number of osteocytes, usually present with pathology
hematopoietic marrow is in?
ribs, vertebrae, pelvic bones, most proximal portions of long bones
Hormonal control--

What are the three main hormones that regulate calcium and phosphate metabolism?
calcitonin- inhibit move of calcium from bone to blood
2. parathyroid- bone resorption
3. vit D- absorb of Ca from intestines
decrease Vit D leads to rickets in children and ostemalacia in adults
disorders of growth and maturation
-
the 4 different groups are?
1. delayed cartilgae maturation disorder
-cretinism
-morquios disease
2. bone modeling disorder
- osteopetrosis
3. Epiphyseal plate disorder
-achondroplasia
-scurvy
-osteomalacia
-kyphoscolioses
4. delayed bone maturation disorder
-osteogenesis imperfecta
OI-brittle bone disease
etiology ?
1. hereditary disorder of collagen synthesis leadong to formation of abn collagen
2. insufficient synthesis of type 1 collagen
3. affects hearing, blue sclera
disorders of growth and maturation
-
OI pathology is?
dec synthesis of collagen--->reduced bone formation--->thin cortex--->rarefaction of trabeculae--->pahtological fractures
the 4 different groups are?
1. delayed cartilgae maturation disorder
-cretinism
-morquios disease
2. bone modeling disorder
- osteopetrosis
3. Epiphyseal plate disorder
-achondroplasia
-scurvy
-osteomalacia
-kyphoscolioses
4. delayed bone maturation disorder
-osteogenesis imperfecta
OI prevelance is?

Treatment?
20-50,000
2.no cure, surgical Rodding- rod thru bone to strengthen
-exercise as much as possible
OI-brittle bone disease
etiology ?
1. hereditary disorder of collagen synthesis leadong to formation of abn collagen
2. insufficient synthesis of type 1 collagen
3. affects hearing, blue sclera
OI pathology is?
dec synthesis of collagen--->reduced bone formation--->thin cortex--->rarefaction of trabeculae--->pahtological fractures
OI prevelance is?

Treatment?
20-50,000
2.no cure, surgical Rodding- rod thru bone to strengthen
-exercise as much as possible
disorders of growth and maturation
-
disorders of growth and maturation
-
the 4 different groups are?
1. delayed cartilgae maturation disorder
-cretinism
-morquios disease
2. bone modeling disorder
- osteopetrosis
3. Epiphyseal plate disorder
-achondroplasia
-scurvy
-osteomalacia
-kyphoscolioses
4. delayed bone maturation disorder
-osteogenesis imperfecta
OI-brittle bone disease
etiology ?
1. hereditary disorder of collagen synthesis leadong to formation of abn collagen
2. insufficient synthesis of type 1 collagen
3. affects hearing, blue sclera
the 4 different groups are?
1. delayed cartilgae maturation disorder
-cretinism
-morquios disease
2. bone modeling disorder
- osteopetrosis
3. Epiphyseal plate disorder
-achondroplasia
-scurvy
-osteomalacia
-kyphoscolioses
4. delayed bone maturation disorder
-osteogenesis imperfecta
OI pathology is?
dec synthesis of collagen--->reduced bone formation--->thin cortex--->rarefaction of trabeculae--->pahtological fractures
OI-brittle bone disease
etiology ?
1. hereditary disorder of collagen synthesis leadong to formation of abn collagen
2. insufficient synthesis of type 1 collagen
3. affects hearing, blue sclera
OI prevelance is?

Treatment?
20-50,000
2.no cure, surgical Rodding- rod thru bone to strengthen
-exercise as much as possible
OI pathology is?
dec synthesis of collagen--->reduced bone formation--->thin cortex--->rarefaction of trabeculae--->pahtological fractures
OI prevelance is?

Treatment?
20-50,000
2.no cure, surgical Rodding- rod thru bone to strengthen
-exercise as much as possible
Osteopetrosis- marble bone disease..

hereditary abnormality of?
2. overgrowth and sclerosis of bones which leads to?
osteoclasts

2. incr density of skeleton- but still breaks easilty- obliteration of medullary cavity---> anemia
Less bone resorption resulting in a net bone.......?
2. two patterns are?
overgrowth
2. malignant- autosomal recessive
-benign-autosomal dominant
ACHONDROPLASIA
-
achondroplasia is related to?
dec cartilaginous growth
dwarfism
long bones are short and thick
epidemiology is?
most common og growth defects by abn body proportions
2. 20% cases have + family hist
3. 80% due to genetic mutation
Achondroplasia-
manifestations are?
limbs-- much shorter than normal
normal skull,facial bones, axial skeleton
**narrow foramen magnum and SP canal= hydrocephalus
-hi risk of repeat mid ear infection--- hearing loss
Achondroplasia treatment is?
no specific tx
px= most live normal life span w/ carefull attention to dangerous complication
Osteochondroma is?
benign mass
-defect in epihphyseal cartilage of long bone- grows laterally soft tissue, from outer hyaline cartilage, stops when epiphysis closes off
Osteochondroma manifestations include?
solitary(mostly), or multiple (inherited autosomal dominant)
2. dx in children(multiple)& young adults
3. men affected 3 times more than women
4. mushroom shaped mass, 3-5cm
5. asymptomatic or symptomatic: deformity, pressure
6. malignant change <1%