Case Presentation: Mycosis fungoides (MF) is a rare cutaneous T-cell lymphoma that progresses from patch-stage dermatitis to tumor-stage lesions. While primarily a dermatologic malignancy, MF can involve systemic organs or transform into more aggressive malignancies. Composite lymphomas (CL), characterized by the coexistence of two distinct lymphomas in one patient, are rare and diagnostically challenging. We [...]