This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Sezary syndrome is included in category of ? 
Select and explain. 
A. T cell leukaemia, B. Lymphoma, C. B cell leukaemia, D. Pigmented disorder of skin
A: T cell leukaemia
Answer: A: T cell leukaemia 
Explanation: Ans. is 'a' i.e., T-Cell leukaemia o Mycosis fungoides & sezary syndrome appear to be a different manifestations of a single neoplastic entity. It is an indolent disorder of pripheral CD4T cells that is characterized by the involvement of skin & therefore belongs to the group of cutaneous T cell lymphoid neoplasms