Unusual Presentations of Adenoid Cystic Carcinoma in Extra-Salivary Gland Subsites in Head and Neck Region: A Case Series

摘要: Adenoid cystic carcinoma (ACC) is an uncommon malignant epithelial tumor occurring in head neck region, accounting for approximately 10% of all salivary gland neoplasms. Extra-salivary involvement other subsites by ACC may present unusual modes creating clinical dilemma. Here we some cases with extra-salivary ACC. In this series six were included. Three patients presented external auditory canal and temporo-mastoid region whom two also had intracranial extension. one case tongue was the site where it confused benign neurogenic tumour. Palatal erosion formation oro-nasal fistula manifestation involving palate. On hand sinonasal bleeding mass which came out as on histopathological examination did not cause any palatal removed successfully via lateral rhiniotomy. these treated post-operative radiotherapy closely followed up early detection distant metastasis. The experience about various manifestations therapeutic challenge poised discussed here.