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  • Title: Immunocytochemistry of cerebrospinal fluid.
    Author: Yam LT, English MC, Janckila AJ, Ziesmer S, Li CY.
    Journal: Acta Cytol; 1987; 31(6):825-33. PubMed ID: 3321816.
    Abstract:
    In order to determine how best to study cells in cerebrospinal fluid (CSF) by immunocytochemical techniques, several crucial technical variables and five immunocytochemical methods were examined. Immunocytochemical studies could be performed on either cell suspensions or smears. The method using cell suspensions was more sensitive, producing less background staining, but requiring more cells than that using smears. Among the five methods examined, indirect immunoperoxidase (IP) and indirect immunoalkaline phosphatase (IAP) were comparable in sensitivity. The peroxidase-antiperoxidase (PAP), alkaline phosphatase-antialkaline phosphatase (APAAP) and avidin-biotin complex-immunoalkaline phosphatase (ABC-AP) methods were comparable in sensitivity and were more sensitive than either the IP or IAP technique. The peroxidase methods were plagued with problems related to endogenous enzyme activity and the ABC-AP method may exhibit undesirable background staining. Therefore, the IAP method should be used for cell suspensions and the APAAP for cells on smears. In CSF specimens with a small number of cells, immunocytochemical studies should be done on smears by the APAAP method. These conclusions are supported by our experience with CSF specimens from patients with reactive and neoplastic lymphocytoses.
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