Fibrous Dysplasia of the Thyroid Cartilage – A Case Study and Review of the Literature - Fibrous Dysplasia of the Thyroid Cartilage – A Case Study and Review of the Literature - Open Access Pub

Fibrous dysplasia is a rare disorder of bone that is uncommon in the head and neck region. Herein, we present a rare case of polyostotic fibrous dysplasia involving the right temporal bone and thyroid cartilage in a 19-year-old male. This unique location necessitates close surveillance due to the proximity to the airway and the potential for malignant degeneration. DOI10.14302/issn.2379-8572.joa-14-548 Fibrous dysplasia is a rare bone disease that produces 2.5% of all bony tumours and over 7% of all non-malignant tumours of bone. We present an uncommon case of polyostotic fibrous dysplasia with involvement of the thyroid cartilage. The clinical features, etiology, histological and radiological features, and treatment of fibrous dysplasia are reviewed. Case Report We report a case of a 19 year old gentleman with no significant past medical or family history of note, who first presented with right-sided headache of 1 month duration. CT scan showed focal bony thickening involving the right squamous temporal bone and greater wing of the sphenoid with internal ground-glass appearance, consistent with focal fibrous dysplasia. He re-presented 5 months later with right-sided cervical lymphadenopathy of 1-month duration. Fine needle aspiration cytology showed necrosis with mild acute inflammation. CT scan revealed right-sided suppurative cervical lymph nodes at levels 2 and 3, with an incidental finding of bilateral lamella expansions of the thyroid cartilage with cystic changes on the left, consistent with fibrous dysplasia. Cultures from the aspirate were positive for mycobacterium tuberculosis and the patient was treated with 6 months of anti-tuberculous chemotherapy. He has been followed-up for a 3 year duration, and has since remained well, with no further complaints of headache, neck pain or swelling. Figure 1. CT scan showing bilateral lamella expansions of the thyroid cartilage with cystic changes on the left We report a case of a 19 year old gentleman with no significant past medical or family history of note, who first presented with right-sided headache of 1 month duration. CT scan showed focal bony thickening involving the right squamous temporal bone and greater wing of the sphenoid with internal ground-glass appearance, consistent with focal fibrous dysplasia. He re-presented 5 months later with right-sided cervical lymphadenopathy of 1-month duration. Fine needle aspiration cytology showed necrosis with mild acute inflammation. CT scan revealed right-sided suppurative cervical lymph nodes at levels 2 and 3, with an incidental finding of bilateral