Objective: Mycosis fungoides (MF) is the cutaneous T cell lymphoma. Classical, clinical and histopathological findings of MF are detected in most of the patients. However, some of the patients have defined atypical MF. hypopigmented MF (HMF) is one of the atypical forms. HMF could be misdiagnosed with clinical and histopathological examination. HMF is considered mistakenly vitiligo. Therefore, it should be considered differential diagnosis. MF is usually seen in the middle aged and elderly. The occurrence of mycosis fungoides in children is very rare. Method: An 7-year-old girl child attended dermatology clinic with complaints of pruritus and hipopigmented patches. Lesions was performed punch biopsy and reported HMF. Conclusion: Herein, this case presented because it was considered vitiligo as clinically and diagnosed HMFas histopathologically.