[Clinical results of double versus single mammary artery myocardiac revascularization: 15 years of follow-up].

Introduction: Use of the left internal mammary artery to bypass the left anterior descending coronary artery reduces cardiac events and increases survival. However, there is some controversy as to the benefits of using both mammary arteries.

Objectives: To assess the long-term outcome of the use of both mammary arteries in comparison with the use of only one.

[Involvement of the submadibular region in epidermoid carcinoma of the mouth floor. Prospective study of 31 cases].

Background: To evaluate the primary or secondary involvement of the submandibular gland in floor of mouth squamous cell carcinoma.

Methods: An analytic-observational study of prospective type was carried out on 31 patients operated for floor of mouth carcinoma, between June 1993 and January 1996, in a reference hospital for a population of 1,100,000 inhabitants. The investigated variables were: age, sex, tumor localization, clinical TNM, type of cervical surgery, evolution, number of positive cervical metastasis, state of the submandibular gland and presence of the periglandular metastasis.

Stafne bone cyst. Revision of four cases, one of them with bilateral affectation.

Stafne bone cyst of the mandible is the only described destructive bone lesion that is highly localized, nonprogressive, but nonhealing. Such defects usually occur unilaterally, however, bilateral defects are occasionally reported. This paper reports 4 cases of Stafne's bone cyst, one of which showed bilateral presentation.