lung cancer is considered the most lethal of all malignant tumors. It is the disease with the highest mortality for malignant neoplasias. It requires surgery in early stages; therefore the knowledge of the anatomical variations of lung arteries is of utmost importance for surgery success. Objective: to describe the varying patterns in the branches of the right pulmonary artery taking into account origin and number. Methods: an observational and descriptive study in the Human Anatomy Department

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... f the School of Medicine in Camagüey was conducted from November 2014 to May 2016. The universe was formed by 50 anatomical preparations of human lungs. The specimens were rinsed with pipe water and immersed in a formalin 5 % solution during a period of more than three months. A macroscopic dissection of the lungs was performed. The study variables were: number and origin of the segmental branches. A form was designed for collecting data and with the information obtained descriptive statistics and distribution of frequencies were used. Results: the most observed variable was number. The variation of origin was less frequent. It was only found in six preparations. Conclusions: anatomical variations of origin were less frequent, with a prevalence of non-correspondent trunk modality. Regarding number, variants in the upper lung lobe prevailed and variety corresponded to double segmental arteries, anterior segmental artery and segmental of middle lobe. DeCS: ANATOMIC VARIATION; PULMONARY ARTERY/anatomy & histology; DISSECTION; LUNG; OBSERVATIONAL STUDY.