In summary, let me emphasize that the radicular cyst is the most common cyst of the buccal cavity. It may vary in size from a small pea-sized periapical lesion, to one which may obliterate the antral space or cause fracture of the mandible. Many normal maxillary sinuses have been surgically opened because of a misinterpretation of the findings. Any plan of surgery which eliminates the cyst at the expense of sound teeth and the osseous structures creates difficult prosthetic problems and works a hardship on the patient. To disregard the cosmetic aspect of this type of surgery is an admission of our inadequacy in coping with a simple principle. The open or flap type of operation should be limited to the cyst of modest size which does not involve adjacent structures such as the antrum, floor of the nose, or the mandibular canal. Marsupialization or the Partsch operation offers a conservative and safe method in disposing of the large cyst. Although the purpose in any method of operation is to dispose of the cyst, the prevention of cosmetic as well as prosthetic problems should be kept in mind. 8 Tumors most frequently encountered in the mouth and jaws are benign. Malignant neoplasms, on the other hand, are seen sufficiently often to warrant a keen and alert interest in any new growth or swelling. The adult past middle life is more prone to carcinoma than the young. Ossifying tumors may occur in both young and old and vary from benign to malignant. In contrast to conservative surgical methods ordinarily employed in cyst management, very little consideration is given to resulting deformities when dealing with malignant neoplasms or those whose classification borders on the malignant. Besides surgery, x-radiation and radium are at present the commonly accepted methods of treatment. In closing, let me emphasize that the success of our treatment in lesions of the buccal cavity is dependent upon early recognition, intelligent diagnosis, and adequate therapy.