F-FDG PET/CT to differentiate malignant necrotic lymph node from benign cystic lesions in the neck.

Objective: Patients presenting with cystic lesions in the neck without obvious signs of malignancy constitute a diagnostic challenge since fine needle aspiration is often insufficient and a diagnosis may not be reached until surgical resection/biopsy is performed. The differential diagnosis of a cystic cervical mass comprises a variety of benign conditions, but malignancy must be ruled out. We examined the diagnostic performance of fluorine-18 fluorodeoxyglucose (F-FDG) PET/CT to identify malignancy.

[Salivary stone in parotid gland with a cutaneous fistula].

Parotid fistulas are very rare and arise from various causes such as trauma, operative complications, infection, malignancy and stone. They may also be congenital. A rare case of cutaneous salivary fistula is presented.