Serum total lactate dehydrogenase level will NOT be raised in –
**Core Concept**
Serum total lactate dehydrogenase (LDH) is an enzyme that catalyzes the conversion of lactate to pyruvate. Elevated levels of LDH in serum are often indicative of tissue damage or necrosis, which can occur due to various pathological conditions, such as myocardial infarction, stroke, or malignancies.
**Why the Correct Answer is Right**
LDH is primarily localized in the cytoplasm of cells, and its release into the bloodstream occurs when cellular damage or necrosis occurs. However, there are certain conditions where LDH levels may not be elevated, such as in cases of **hemolysis** caused by conditions like G6PD deficiency. In G6PD deficiency, red blood cells are prone to hemolysis, but the breakdown products of hemolysis, including LDH, are quickly metabolized and cleared from the bloodstream, preventing an increase in serum LDH levels.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** This option is not provided.
* **Option C:** This option is not provided.
* **Option D:** This option is not provided.
**Clinical Pearl / High-Yield Fact**
When interpreting serum LDH levels, it's essential to consider the patient's clinical context and other laboratory findings, as LDH can be elevated in various conditions, including malignancies, myocardial infarction, and liver disease. A notable exception is G6PD deficiency, where hemolysis does not lead to elevated LDH levels.
**Correct Answer:** Not Provided