Cytosol and serum ferritin in breast carcinoma.

This study was undertaken to determine tissue and serum ferritin levels in different stages of breast carcinoma. Eighty-nine cases have been evaluated, the groups investigated being breast carcinoma, benign breast disease and healthy controls. Ferritin levels in both the sera and the tissue cytosols were measured by an enzyme immunoassay method, while total proteins were assayed by Lowry's procedure and the ferritin concentrations given in ng ferritin/mg cytosol protein. No significant difference has been determined for serum ferritin between any of the groups studied, while the tissue cytosol ferritins were found to be 91.6 +/- 50.9, 565.0 +/- 48.3, 142.7 +/- 93.3, 683.3 +/- 212.9 and 655.5 +/- 100.4 ng/mg cytosol protein for the benign, malign (global), malign (stage I), malign (stage II) and malign (stage III) groups, respectively. The differences between the malign groups and the benign group were found to be highly significant (P < 0.001) except for the stage I subgroup, which was fairly significant (P < 0.05). A sensitivity of 90% was evaluated for tissue cytosol ferritin in breast carcinoma, the 'intra-patient' sensitivity being 100%. In conclusion, we state that tissue ferritin is more valuable than serum ferritin as a tumour marker of diagnosis for breast carcinoma.