Sezary syndrome is included in category of ?
**Core Concept**
Sezary syndrome is a type of cutaneous T-cell lymphoma characterized by the presence of malignant T-cells in the skin and peripheral blood. It is a rare and aggressive form of non-Hodgkin lymphoma that affects the skin and underlying tissues.
**Why the Correct Answer is Right**
Sezary syndrome is a subtype of cutaneous T-cell lymphoma, which is a category of non-Hodgkin lymphoma that originates from the skin. The malignant T-cells in Sezary syndrome exhibit CD4+ phenotype and express CD2, CD3, CD4, and CD5 markers. The diagnosis of Sezary syndrome is based on the presence of characteristic skin lesions, lymphadenopathy, and the presence of malignant T-cells in the peripheral blood.
**Why Each Wrong Option is Incorrect**
* **Option A:** Not applicable, as there is no relevant information to evaluate.
* **Option B:** Not correct, as Sezary syndrome is a specific subtype of cutaneous T-cell lymphoma, not a general category.
* **Option C:** Not correct, as Sezary syndrome is a type of non-Hodgkin lymphoma, not a type of Hodgkin lymphoma.
* **Option D:** Not correct, as while Sezary syndrome is a type of cutaneous lymphoma, it is not a type of mycosis fungoides, which is another subtype of cutaneous T-cell lymphoma.
**Clinical Pearl / High-Yield Fact**
Sezary syndrome is often associated with a poor prognosis and requires aggressive treatment, including chemotherapy, radiation therapy, and immunotherapy. The diagnosis of Sezary syndrome is based on a combination of clinical findings, histopathology, and immunophenotyping.
**Correct Answer: B. Cutaneous T-cell lymphoma.