Diagnostic criteria of Hodgkin&;s disease are A/E –
## **Core Concept**
Hodgkin's disease, also known as Hodgkin lymphoma, is a type of lymphoma characterized by the presence of **Reed-Sternberg cells** in the lymph nodes. The diagnostic criteria involve a combination of clinical, radiological, and histopathological findings. The presence of Reed-Sternberg cells is a hallmark for the diagnosis.
## **Why the Correct Answer is Right**
The correct answer, **Reed-Sternberg cells**, is right because these distinctive, large, often multinucleated cells are pathognomonic for Hodgkin lymphoma. They are a key diagnostic feature that distinguishes Hodgkin lymphoma from other types of lymphomas. The presence of Reed-Sternberg cells, along with other diagnostic criteria such as lymph node involvement and systemic symptoms, helps in confirming the diagnosis.
## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not specified, but typically, other diagnostic criteria such as **lymph node involvement**, **systemic symptoms** (e.g., fever, night sweats, weight loss), and **specific radiological findings** are important in the diagnosis of Hodgkin's disease. Without the specific details of Option A, it's challenging to provide a direct explanation, but generally, these criteria are crucial for staging and diagnosis.
- **Option B:** Similarly, without specifics, if Option B refers to another feature not unique or specific to Hodgkin's lymphoma, it would be incorrect in the context of being a defining or diagnostic criterion.
- **Option C:** This option is also unspecified, but if it refers to a feature not directly related to the definitive diagnosis of Hodgkin lymphoma, it would be considered incorrect.
## **Clinical Pearl / High-Yield Fact**
A key clinical pearl for Hodgkin lymphoma is the association with **EBV (Epstein-Barr Virus)**, as approximately 20-40% of Hodgkin lymphoma cases are EBV-positive. This viral association can sometimes be used as an ancillary test in diagnosis. Another high-yield fact is that the **presence of Reed-Sternberg cells** is essential for the diagnosis, and these cells are typically **CD15 and CD30 positive**, which can help in differentiating Hodgkin lymphoma from non-Hodgkin lymphomas.
## **Correct Answer:** . Reed-Sternberg cells