A case of papillary carcinoma arising in the wall of a thyroglossal duct cyst is described. These cancers are very rare and rather adult-specific. Preoperative diagnosis may be enhanced using fine-needle aspiration cytology and computing tomography findings. The standard treatment of thyroglossal duct cyst carcinoma is the sistrunk procedure. The concept of prognostic risk groups should be used to identify patients who would additionally undergo total thyroidectomy.

Otorhinolaryngologic mucormycosis is a rare fungal infection, which needs to be borne in mind. Rhinocerebral lesions are the most common clinical manifestations. Involvement of the ear is very rare. Diagnosis is often difficult, but should be as early as possible. Treatment, initiated urgently, associates antifungal treatment, surgical resection and control of risk factors. The prognosis remains in all cases severe.

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