Tuberous sclerosis is a rare neuro-cutaneous syndrome, one of the phakomatosis, characterized by facial angiofibromas (adenoma sebaceum), mental retardation and epilepsy. This classic triad occurs in less than one half of patients, probably in one-third, thus requiring a high index of suspicion to diagnose. Consequently it may easily be misdiagnosed as neurofibromatosis or other medical conditions. This is a case report of tuberous sclerosis in a 13-year-old Nigerian girl that was misdiagnosed as neurofibromatosis because of her cutaneous lesions. This paper discussed the case and reviewed the literature. A comprehensive medical clerkship, thorough physical examination, high index of clinical suspicion and neuroimaging investigations are required to confirm diagnosis.