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Pyriform sinus carcinoma is a highly malignant carcinoma of the head and neck region as a result of its location and its potential for metastatic spread. Decisions regarding the operative procedure remain very difficult. In this paper, we present a modified partial laryngo-pharyngectomy in which, following extended vertical laryngectomy, the cancerous mass is removed from the involved pyriform sinus and the remaining hypopharynx is reconstructed by using the preserved outer perichondrium of the resected thyroid cartilage. This technique has been applied with adequate success during the last five years in five cases in our department. It is indicated when a pyriform sinus carcinoma does not extend to the pyriform apex and does not involve the anterior and posterior laryngeal commissures, paraglottic space, retrocricoid region and posterior pharyngeal wall beyond the midline. All patients treated were male and middle-aged. Our technique appears to be a reliable alternative for the operative treatment of pyriform sinus carcinoma. [ABSTRACT FROM AUTHOR]