An unusual case of neurofibroma of the thyroid capsule

A solitary neurofibroma arising from the thyroid capsule in a 64 year-old woman is reported. The tumor was adherent to the lower margin of the thyroid gland and extended into the anterior mediastinum. The unusual nature of the lesion, both its relationship to the thyroid gland and to the occurrence of a neural tumor in the anterior mediastinum is discussed.