| Summary: | Cutaneous T-cell lymphoma (CTCL) encompasses a group of low-grade, non-Hodgkin lymphoma, including mycosis fungoides and Sézary syndrome. Diagnosis of CTCL can be challenging given the prolonged, gradual onset and shared characteristics with many benign inflammatory skin diseases. In this case series, we describe four unique cases of patients with chronic, recalcitrant eczematous dermatitis who presented for a patch-test consultation and were ultimately diagnosed with CTCL. In particular, we highlight clinical pearls to aid in distinguishing CTCL from inflammatory dermatoses and describe the diagnostic strategy to help dermatologists arrive at the diagnosis of CTCL at earlier stages of the disease.
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