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الورم العصبي الليفي النوع 1

Neurofibromatosis type 1 is a condition characterised by changes in skin coloring (pigmentation) and the growth of tumours along nerves in the skin, brain, and other parts of the body. The signs and symptoms of this condition vary widely among affected people.

الوصف

Neurofibromatosis type 1 is a condition characterised by changes in skin coloring (pigmentation) and the growth of tumours along nerves in the skin, brain, and other parts of the body. The signs and symptoms of this condition vary widely among affected people.

Beginning in early childhood, almost all people with neurofibromatosis type 1 have multiple café-au-lait spots, which are flat patches on the skin that are darker than the surrounding area. These spots increase in size and number as the individual grows older. Freckles in the underarms and groin typically develop later in childhood.

Most adults with neurofibromatosis type 1 develop neurofibromas, which are noncancerous (benign) tumours that are usually located on or just under the skin. These tumours may also occur in nerves near the spinal cord or along nerves elsewhere in the body. Some people with neurofibromatosis type 1 develop cancerous tumours that grow along nerves. These tumours, which usually develop in adolescence or adulthood, are called malignant peripheral nerve sheath tumours. People with neurofibromatosis type 1 also have an increased risk of developing other cancers, including brain tumours and cancer of blood-forming tissue (leukemia).

During childhood, benign growths called Lisch nodules often appear in the colored part of the eye (the iris). Lisch nodules do not interfere with vision. Some affected individuals also develop tumours that grow along the nerve leading from the eye to the brain (the optic nerve). These tumours, which are called optic gliomas, may lead to reduced vision or total vision loss. In some cases, optic gliomas have no effect on vision.

Additional signs and symptoms of neurofibromatosis type 1 vary, but they can include high blood pressure (hypertension), short stature, an unusually large head (macrocephaly), and skeletal abnormalities such as an abnormal curvature of the spine (scoliosis). Although most people with neurofibromatosis type 1 have normal intelligence, learning disabilities and attention-deficit/hyperactivity disorder (ADHD) occur frequently in affected individuals.

Inheritance patterns

The source lists the following possible inheritance patterns: Autosomal dominant. More than one pattern can apply in different cases.

Other names

Neurofibromatosis 1

NF1

Peripheral neurofibromatosis

Recklinghausen disease, nerve

Von Recklinghausen disease

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