Characterization of the Microbiome in Cutaneous T Cell Lymphoma

This study is collecting skin swabs and blood samples from people with cutaneous T-cell lymphoma (a rare skin cancer), psoriasis, eczema, or healthy skin, to understand how the bacteria living on the skin differ between these groups. **You may be eligible if...** - You are between 18 and 89 years old - You have cutaneous T-cell lymphoma (any stage), a CD30+ lymphoproliferative skin disorder, plaque psoriasis, moderate-to-severe atopic dermatitis (eczema), or you are a healthy volunteer - You are willing and able to provide informed consent **You may NOT be eligible if...** - You are outside the age range of 18-89 - You are unable or unwilling to provide consent Talk to your doctor to see if this trial is right for you.