Khurayzi, Tawfiq, and Abdullah Alshahrani. 2017. “Metastatic Paranasal Sinuses Adenocarcinoma from Breast Carcinoma, a Rare Event: A Case Report”. International Journal of Otorhinolaryngology and Head and Neck Surgery 3 (4):1099-1102. https://doi.org/10.18203/issn.2454-5929.ijohns20174340.