label: Abnormal amyloid beta 42 peptide CSF concentration
label_lc: abnormal amyloid beta 42 peptide csf concentration
description: "Any deviation from the normal concentration of amyloid beta 42 peptide in the cerebrospinal fluid (CSF). Amyloid beta is a peptide of 36-43 amino acids that is processed from the Amyloid precursor protein. ABeta42, which is 42 amino acids in length, is the longer form."