Introduction:

Neurofribomatosis type 1 is a common genetic disorder that can frequently affect the skeleton. Skeletal manifestations of type 1 neurofibromatosis include scoliosis, congenital pseudoarthrosis of the tibia, and intraosseous cystic lesions.

Objective:

To describe the clinical and images characteristics of this disease, which are present in the case we report, and to describe the treatment and evolution of the patient.

Case report: A hip dislocation resulting from an intra-articular neurofibroma is presented in a 17-year-old female patient who suffered minor trauma. Dislocation and its cause in this patient were initially suspected due to the clinical condition and abnormal findings on the first pelvis x-rays and later it was confirmed by computed tomography and magnetic resonance imaging. Closed reduction was performed under general anesthesia with posterior soft tissue traction for four weeks. The case was followed by outpatient consultation for one year with no new episode of hip dislocation.

Conclusions:

Recurrent hip dislocation associated with neurofibromatosis type 1 is a rare occurrence and it is poorly reported in the literature. This case illustrates the clinical and particularly imaging characteristics of type 1 neurofibromatosis, using x-rays, magnetic resonance imaging, and computed tomography with reconstruction. Closed reduction under general anesthesia was the treatment performed followed by soft tissue traction for four weeks, which was satisfactory.

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