becker’s nevus in a 24-year-old female patient with rheumatoid arthritis: a case report of a laser therapy without recurrence

Introduction: becker’s nevus is a type of cutaneous hamartoma that occurs as a brown hyperpigmented patch with irregular borders. the exact pathogenesis of becker’s nevus is not clear, but hormonal disturbances might play a triggering role. q-switched lasers have demonstrated favorable effects on improving hyperpigmentation lesions; however, following using a q-switched laser, the nevus usually reoccurs. case presentation: in this study, we described a 24-year-old female patient with becker’s nevus treated with q-switched ruby laser (694 nm) whose lesion recovered without any complications or recurrence. the patient had rheumatoid arthritis and has been taking oral methotrexate, hydroxychloroquine, and prednisolone for ten years. conclusions: although hyperpigmentation has reported following laser therapy, our patient did not develop any pigmentation, and the lesion did not recur, which can be due to her concurrent drugs, suggesting the role of the immune system in recurrence of backer’s nevus.