[Differencial diagnosis of the low alkaline phosphatase activities].

Laboratory diagnostics is especially important in the diagnosis of certain diseases. We compared manual measurements results to laboratory normal values. In some cases, these values depend on the gender and age as well. In the case of alkaline phosphatase, it is rarely considered that reference values change over life periods. Unfortunately, during the daily practice we do not always take into account of the changes with aging. This is especially true if the laboratory does not specify the age related normal values. Another problem that we mostly focus on the results exceeding the normal values, and do not pay enough attention to the low values. Of course, these results should be put in the context of the clinical picture and other diagnostic test results. We would like to draw attention to the measuring of alkaline phosphatase and the differential diagnosis for low serum activity. Orv Hetil. 2017; 158(26): 1003-1007.