A substance, such as pollen, that causes an allergy. - Though allergens are not harmful themselves, when they are combined with certain antibodies, a reaction (i.e. the allergy) liberates substances that damage body cells and tissues.. A substance, such as pollen, that causes an allergy. [German. : , allergy; see allergy +. , -gen (from French. ; see-gen).]. alâ²lerÂ·genâ²ic (-jÄnâ²Ä­k) adj.
A Honor Society of Nursing (STTI) answered. Prognosis varies depending on the type of motor neuron disease (MND) and the age of onset. Some MNDs, such as Post-polio syndrome (PLS), are not fatal and progress slowly.People with Spinal muscular atrophy (SMA) may appear to be stable for long periods, but improvement should not be expected.ome MNDs, such as Post-polio syndrome (PLS), are not fatal and progress slowly. People with Spinal muscular atrophy (SMA) may appear to be stable for long periods, but improvement should not be expected.
Prognosis for Cerebral Atrophy: The prognosis for individuals with the disorder varies. Progressive cerebral atrophy is fatal because the atrophy spreads to all parts of the brain.Cerebral atrophy that is limited to a specific area of the brain affects normal functioning, however, it is not necessarily fatal.rognosis for Cerebral Atrophy: The prognosis for individuals with the disorder varies. Progressive cerebral atrophy is fatal because the atrophy spreads to all parts of the brain.