**Core Concept**
Sézary-Lutzner cells are a type of malignant T lymphocyte seen in a specific type of cutaneous T-cell lymphoma. They are characterized by their distinctive appearance under the microscope, with a cerebriform nucleus and a high nuclear-to-cytoplasmic ratio.

**Why the Correct Answer is Right**
Sézary-Lutzner cells are a hallmark feature of Sézary syndrome, a rare and aggressive form of cutaneous T-cell lymphoma. These cells are typically found in the peripheral blood and skin of affected individuals. The presence of Sézary-Lutzner cells is a key diagnostic criterion for Sézary syndrome, which is a distinct clinical entity from mycosis fungoides. The pathogenesis of Sézary syndrome involves the clonal expansion of malignant T lymphocytes, which leads to the characteristic skin lesions and systemic symptoms.

**Why Each Wrong Option is Incorrect**
**Option A:** Sézary-Lutzner cells are not typically associated with Hodgkin lymphoma, which is characterized by the presence of Reed-Sternberg cells. While both conditions involve lymphoid malignancies, they have distinct clinical and pathological features.
**Option B:** Sézary-Lutzner cells are not found in benign conditions such as psoriasis or dermatitis, which are characterized by inflammatory skin lesions rather than malignant cells.
**Option C:** Sézary-Lutzner cells are not a feature of anaplastic large cell lymphoma, which is a distinct subtype of non-Hodgkin lymphoma characterized by the presence of anaplastic large cells.

**Clinical Pearl / High-Yield Fact**
Sézary syndrome is a rare but aggressive form of cutaneous T-cell lymphoma that requires prompt recognition and treatment. The presence of Sézary-Lutzner cells in the peripheral blood is a key diagnostic criterion, and their identification can guide further clinical evaluation and management.

**Correct Answer:** D. Sézary-Lutzner cells are seen in Sézary syndrome.