How is Neurofibromatosis diagnosed?
See how Neurofibromatosis is diagnosed. Which specialists are essential to meet, what tests are needed and other useful information for the diagnosis of Neurofibromatosis
Neurofibromatosis (NF) is a genetic disorder that affects the growth and development of nerve cells in the body. It can cause tumors to form on nerves, leading to various complications. Diagnosing NF involves a combination of clinical evaluation, medical history assessment, and diagnostic tests.
1. Clinical Evaluation:
During a clinical evaluation, a healthcare professional, typically a neurologist or geneticist, will examine the patient for physical signs and symptoms associated with NF. They will carefully assess the skin, nervous system, and other relevant areas of the body. The presence of certain characteristic features can provide initial clues for a potential NF diagnosis.
2. Medical History Assessment:
A detailed medical history assessment is crucial in diagnosing NF. The healthcare provider will inquire about any family history of NF or related conditions, as NF can be inherited. They will also ask about the patient's personal medical history, including any symptoms or concerns that may be indicative of NF.
3. Diagnostic Tests:
Confirming a diagnosis of NF often requires specific diagnostic tests. These tests help evaluate the presence of tumors, assess their characteristics, and determine the extent of the condition. The most common diagnostic tests for NF include:
a. Neurological Examination:
A neurological examination is performed to assess the functioning of the nervous system. This examination may involve testing reflexes, muscle strength, coordination, and sensory responses. Any abnormalities detected during this examination can provide valuable information for diagnosing NF.
b. Imaging Studies:
Imaging studies such as magnetic resonance imaging (MRI) and computed tomography (CT) scans are commonly used to visualize the internal structures of the body. These tests can help identify the presence and location of tumors associated with NF. They also aid in determining the size and characteristics of the tumors.
c. Genetic Testing:
Genetic testing plays a crucial role in diagnosing NF, especially in cases where there is no family history of the condition. It involves analyzing a blood or saliva sample to identify specific genetic mutations associated with NF. The most common genes tested for NF are NF1 and NF2. Genetic testing can confirm the presence of these mutations and help establish a definitive diagnosis.
d. Skin Biopsy:
In some cases, a skin biopsy may be performed to examine the characteristics of skin lesions associated with NF. During a skin biopsy, a small sample of skin tissue is taken and analyzed under a microscope. This can help determine if the skin lesions are neurofibromas, which are a hallmark of NF.
e. Eye Examination:
An eye examination may be conducted to assess the presence of certain eye abnormalities associated with NF, such as optic gliomas. This examination may involve visual acuity tests, visual field tests, and examination of the optic nerve.
Conclusion:
Diagnosing Neurofibromatosis involves a comprehensive approach that combines clinical evaluation, medical history assessment, and specific diagnostic tests. The presence of characteristic physical signs, along with the results of imaging studies, genetic testing, and other relevant examinations, help healthcare professionals make an accurate diagnosis. Early diagnosis is crucial for managing NF and implementing appropriate treatment strategies.
Flat, light brown spots on the skin (cafe au lait spots). These harmless spots are common in many people. Having more than six cafe au lait spots is a strong indication of NF1. They are usually present at birth or appear during the first years of life and then stabilize.
Freckling in the armpits or groin area. Freckling usually appears by ages 3 to 5. Freckles are smaller than cafe au lait spots and tend to occur in clusters in skin folds.
Tiny bumps on the iris of your eye (Lisch nodules). These harmless nodules can't easily be seen and don't affect your vision.
Soft bumps on or under the skin (neurofibromas). These benign tumors usually develop in or under the skin, but can also grow inside of the body. Sometimes, a growth will involve multiple nerves (plexiform neurofibroma).
Bone deformities. Abnormal bone growth and a deficiency in bone mineral density can cause bone deformities such as a curved spine (scoliosis) or bowed lower leg.
Tumor on the optic nerve (optic glioma). These tumors usually appear by age 3, rarely in late childhood and adolescence, and almost never in adults.
Learning disabilities. Impaired thinking skills are common in children with NF1, but are usually mild. Often there is a specific learning disability, such as problem with reading or mathematics. Attention-deficit/hyperactivity disorder (ADHD) is also common.
Larger than average head size. Children with NF1 tend to have a larger than average head size due to increased brain volume.
Short stature. Children with NF1 often are below average in height.
Mayo Clinic Staff Print. (2015, December 24). Neurofibromatosis. Retrieved March 04, 2017, from http://www.mayoclinic.org/diseases-conditions/neurofibromatosis/symptoms-causes/dxc-20167896
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