MUC1 and neoplasm: Count rates per weight tissue (cps/g) determined in the well counter and calculation of tumour/foot ratio (foot serving as reference region) showed 131I-anti-MUC1 retention in 4 of the 5 mice (median 14 cps/g, range 1–109) and low tumour retention of  131I-anti-TNP (median 1 cps/g, range 1–6).