[Phosphohexose isomerase in cyst fluids and effusions as a complement to cytological diagnosis]

Phosphohexose-isomerase concentration in cysts and effusions of various localisations was measured in 83 cases. The enzyme activity was compared with aspiration-cytologic results on the basis of histologic diagnoses. There is a reasonable correlation from cytologic cellularity and PHI-concentration. PHI-measurements give an additional information whether an aspirated fluid derives from a benign or a malignant lesion.