Biochemical victims: false negative diagnosis through overreliance on laboratory results--a personal report.

The increasing tendency of doctors to base diagnosis on the results of laboratory investigations entails a corresponding decrease in the exercise of clinical judgment. This state of affairs can have harmful consequences for patients suffering from biochemically atypical forms of disorder, who may acquire functional psychiatric labels when they are in fact suffering from organic physical disorders. The author's personal experience of this invidious predicament is described. Although hypothyroidism was correctly diagnosed on clinical grounds within a few months of presentation, laboratory results were inconclusive and three years and three specialist consultations were to elapse before replacement therapy was obtained, and then only through unofficial channels. The handling of this case illustrates some unfortunate trends in contemporary medical practice with important implications for the health of patients.