The authors draw attention to the tendency of thyroid carcinoma to develop secondaries in the bones of the calva which may be „signaling“ metastases: they draw attention to the hitherto not revealed presence of this primary malignant tumour. When map-like destructions are found with spicular periostal reactions due to detachment of the periosteum from the lamina externa gradually enlarging due to a secondary deposit, it is important, in particular in elderly women to include the thyroid gland among organs suspicious as a possible source of dissemination.

        Key words: thyroid cancer - metastases in the bones of the calva