Which of the following haematological malignancies can lead to following?
**Core Concept**
The question is likely referring to a paraneoplastic syndrome associated with a specific type of haematological malignancy. Paraneoplastic syndromes are rare disorders that occur as a result of the immune response to a tumour, but not due to direct local effects of the tumour's cells. The correct answer is linked to a haematological malignancy that can cause a characteristic paraneoplastic syndrome.
**Why the Correct Answer is Right**
The correct answer is **A.** **Hodgkin's Lymphoma**. Hodgkin's lymphoma can lead to **Erythrocytosis**, a condition characterized by an excessive production of red blood cells. This occurs due to the secretion of erythropoietin (EPO) by the tumour cells or as a result of the paraneoplastic production of interleukin-6 (IL-6), which stimulates erythropoiesis. Erythrocytosis can manifest as an elevated haemoglobin level, increased red blood cell count, or a decrease in serum iron.
**Why Each Wrong Option is Incorrect**
* **Option B:** This option is not a correct association. **Acute Leukaemia** is a broader category of haematological malignancies and is not specifically linked to erythrocytosis.
* **Option C:** **Multiple Myeloma** is a type of plasma cell dyscrasia that can cause various paraneoplastic syndromes, but it is not characteristically associated with erythrocytosis.
**Clinical Pearl / High-Yield Fact**
When evaluating a patient with an unexplained increase in haemoglobin or red blood cell count, consider the possibility of a paraneoplastic syndrome associated with a haematological malignancy, such as Hodgkin's lymphoma.
**Correct Answer:** A. Hodgkin's Lymphoma