|
A primary brain tumor is a group (mass) of abnormal cells that start in the brain. This article focuses on primary brain tumors in adults. See also: Brain tumor - metastatic (cancer that has spread to the brain; Brain tumor - children.
|
|
|
A brain tumor is an abnormal growth of tissue in the brain. Unlike other tumors, brain tumors spread by local extension and rarely metastasize (spread) outside the brain.
|
|
|
A brain tumor is an abnormal growth of tissue, either malignant (cancerous) or benign (noncancerous), in the brain. Each year, more than 17,000 brain tumors are diagnosed in the United States.
|
![]() |
A cataract is a cloudy or opaque area (an area you cannot see through) in the lens of the eye.
|
|
|
A cataract is a cloudiness or opacity in the normally transparent crystalline lens of the eye. This cloudiness can cause loss of vision and may lead to eventual blindness.
|
|
Cataract, the leading cause of blindness worldwide, is a clouding of the crystalline lens of the eye. Symptoms of cataract include blurred vision, difficulty reading print and street signs, light sensitivity, and glare disability.
|
![]() |
Uncoordinated movement is an abnormality of muscle control or an inability to finely coordinate movements, resulting in a jerky, unsteady, to-and-fro motion of the trunk or the limbs.
|
|
Ataxia, a medical term originated from the Greek language meaning " without order, " refers to disturbances in the control of body posture, motor coordination, speech control, and eye movements. Several brain areas, including the cerebellum and the spinocerebellar tracts, substantia nigra, pons, and cerebral cortex control these functions.
|
|
Developmental coordination disorder is diagnosed when children do not develop normal motor coordination (coordination of movements involving the voluntary muscles). Developmental coordination disorder has been known by many other names, some of which are still used today.
|
|
Lack of coordination in the muscles. Ataxia, an extreme lack of coordination of the muscles, is a symptom of damage to the central nervous system.
|
![]() |
Hearing loss is the total or partial inability to hear sound in one or both ears. See also: Hearing loss of aging
|
|
|
Hearing loss is any degree of impairment of the ability to apprehend sound. Sound can be measured accurately.
|
|
|
Hearing loss is any degree of impairment of the ability to apprehend sound. Sound can be measured accurately.
|
|
|
Hearing loss is any degree of impairment of the ability to comprehend sound. Sound can be accurately measured.
|
![]() |
Facial paralysis is the total loss of voluntary muscle movement of one side of the face.
|