A 72-year-old male presents with generalized erythroderma, s…
A 72-year-old male presents with generalized erythroderma, severe pruritus, and lymphadenopathy. A peripheral blood smear reveals large lymphocytes with irregular, cerebriform nuclei. Flow cytometry of the blood shows a population of T-cells that are CD3+, CD4+, and CD7-. Based on these findings, what is the most likely diagnosis, and what is the hallmark cell type observed?