[Growth and extension of the carcinoma of the sinus piriformis (author's transl)].

Seven cases of sinus piriform cancer have been studied in which a pharyngolaryngectomy was performed after a biopsy had confirmed the diagnosis. The macroscopic study of the tumors shows a clear predominance of exophytic forms besides their tendency to spread in the endolaryngeal structures in a submusous way. The microscopic study indicates that in all the cases epidermoid carcinoma were predominating those that moderate cellular differentiation. The surgical pieces were embedded in celloidin and sectioned both in the horizontal and frontal plane, afterwards being stained with hematoxylin and eosin.