Question
All are causes of osteoporosis except –
| A. |
Old age |
| B. |
Chronic heparin therapy |
| C. |
Hypothyroidism |
| D. |
Thyrotoxicosis |
Show Answer
|
Correct Answer » C Explanation |
 |
Osteoporosis
Osteoporosis is characterized by:
- Reduced bone mass
- Increased bone fragility
- Increased fracture risk
Why C is Correct
Hypothyroidism
- Hypothyroidism generally causes:
- Reduced bone turnover
- It is not a classical cause of osteoporosis.
- Bone loss is more commonly associated with excess thyroid hormone rather than deficiency.
Reasons to Rule Out Other Options
A. Old age
- Common cause of primary osteoporosis
- Age-related decrease in bone mass occurs due to:
- Reduced osteoblastic activity
- Hormonal changes
B. Chronic heparin therapy
- Long-term heparin use causes osteoporosis
- Mechanism:
- Increased bone resorption
- Reduced bone formation
D. Thyrotoxicosis
- Excess thyroid hormone increases bone turnover
- Accelerates bone resorption
- Common secondary cause of osteoporosis