[Giant subcutaneous metastasis originating from vesicular thyroid carcinoma: about a case]. / Métastase géante sous cutanée d'un carcinome vésiculaire de la thyroïde: à propos d'un cas.

Secondary subcutaneous metastasis originating from vesicular thyroid carcinoma is unusual. It accounts for more than 5.8% of most common sites of metastasis for thyroid carcinoma. We here report the case of a 60-year old woman presenting with slowly evolving giant hypervascular lesion in the subcutaneous tissue of the skull occurred 7 years after right thyroid lobectomy. Anatomopathological examination enabled the diagnosis of vesicular thyroid carcinoma. Surgery was based on reduction of the skull lesion as well as on thyroidectomy. Currently, the patient is waiting for radioactive iodine treatment. Metastasis from vesicular carcinoma of the scalp, even though rare, can occur. However, this stage is associated with unfavorable prognosis.