The purpose of this study is to determine whether multiple cutaneous neurofibromas in patients with neurofibromatosis type 1 can be removed with an erbium-YAG-laser.

With a prevalence of 1 in 3-5000 births, neurofibromatosis Type I is one of the most common genetic defects. The mode of inheritance is autosomal dominant and affects a gene (NF1), which is responsible for the production of the tumor suppressor protein neurofibromin. The consequence is an uninhibited expansion of neural tissue which leads amongst others to cosmetic disfigurement of the patients. In comparison to the plexiform neurofibromas the cutaneous tumors do not undergo malignant transformation.

Excision and CO2 laser vaporisation were established as standard treatment but cause unattractive scars.

In one operation more than 500 neurofibromas can be removed with an Erbium: YAG laser (2940 nm). The tumors are dissected by shooting holes into the skin and vaporising the neurofibromas in-between or underneath. Specimen are harvested after Er: YAG-, CO2 - and electrosurgical treatment to evaluate the difference of thermal necrosis histologically and photographs are taken to assess the cosmetic results.

Inclusion Criteria:

• Patients with multiple cutaneous neurofibromas with the request for tumor removal

Exclusion Criteria:

• Pregnancy