Cutaneous T-cell Lymphoma

Cutaneous T-cell lymphoma is a type of cancer that affects the skin, specifically involving a group of white blood cells called T lymphocytes. These cells normally help the body fight infections, but in this condition, they grow uncontrollably and accumulate in the skin. This leads to symptoms such as patches, plaques, or tumors on the skin that may be itchy or scaly. The disease primarily impacts the immune system and skin health, causing chronic skin changes and sometimes spreading to other organs. It is a rare but serious condition that requires medical evaluation to determine the extent and appropriate management.

Cutaneous T-cell lymphoma (CTCL) is a heterogeneous group of non-Hodgkin lymphomas characterized by the malignant proliferation of skin-homing clonal T cells, predominantly of the CD4+ helper T-cell subtype. The pathogenesis involves genetic and epigenetic alterations leading to abnormal T-cell activation, resistance to apoptosis, and skin infiltration. Clinically, CTCL presents with chronic, progressive skin lesions ranging from patches and plaques to tumors, often accompanied by pruritus and potential extracutaneous spread in advanced stages. The most common subtype is mycosis fungoides, which typically follows an indolent course. Diagnosis and staging are critical due to the variable prognosis and treatment strategies. CTCL represents a significant clinical entity due to its impact on skin integrity and immune function.