Alkaline Phosphatase Elevation Explained
Alkaline phosphatase (ALP) is an enzyme found mainly in the liver and bone. Elevated levels typically indicate issues with these tissues.
Conditions Causing Raised Alkaline Phosphatase
- Hyperparathyroidism: This condition involves overactive parathyroid glands, leading to increased bone turnover and osteoblastic activity, which raises ALP levels.
- Obstructive Jaundice: Bile duct obstruction impairs bile flow, causing liver damage and increased production of liver-derived ALP.
- Osteomalacia: This bone disorder involves poor mineralization, stimulating osteoblasts to produce more ALP in an attempt to repair the bone.
Multiple Myeloma as an Exception
Multiple myeloma is a cancer of plasma cells that primarily affects bone marrow. Unlike conditions that stimulate bone formation, multiple myeloma is characterized by bone resorption (breakdown) driven by osteoclasts. This process typically results in normal or even decreased serum ALP levels. While fractures or secondary bone-forming responses can occur, the primary pathology of multiple myeloma does not inherently lead to increased ALP.
Therefore, multiple myeloma is the exception among the given choices for causes of raised alkaline phosphatase.
Important Questions from General Clinical Conditions
- The height of the Jugular Venous Pulse is determined by :
- The SA node is situated at the junction of:
- Reverse splitting of second heart sound is most commonly seen in :
- A 70-year-old man with dyspnoea on exertion has been found to have a single second heart sound and a loud diamond-shaped, rough quality systolic murmur best heard at the right $2^{nd}$ intercostal space, radiating to the right carotid artery. Which one of the following is the likely diagnosis ?
Consider the following statements with regard to pulmonary embolism :
1. Unexplained breathlessness is the most common symptom.
2. When congestive heart failure or pneumonia fail to improve despite standard medical treatment, occult pulmonary embolism should be considered.
3. Patients with high clinical likelihood of venous thromboembolism should first undergo D-dimer testing alone without obligatory imaging tests.
Which of the statements given above are correct?
