Fibrous histiocytoma is uncommon in the head and neck region and rare in the larynx. Its behaviour is unpredictable.
A case is reported in a 54-year-old male which was treated conservatively initially and which recurred several times over a seven year period. During that time the appearances of the lesion changed from those of a densely collagenous, cytologically benign tumour to those of a richly cellular and potentially malignant neoplasm. Laryngectomy was eventually undertaken.