Lateral teleroentgenography was used to examine facial skeleton and skull base in 62 patients with progenic occlusion formed because of adenoids. Thirty-four subjects with similar occlusions but without nasopharyngeal diseases were examined for control. Specific features of the cerebral and facial segments of the skull associated with the presence of adenoids were detected, namely, reduced size of the anterior and posterior sections of skull base, increased inclination angle, reduced length of maxillary body base and of apical basis and the distal position of the maxilla, increase of the maxillary body anterior height and of the central segment of the face, excessive growth of mandibular body and particularly of its branch parallelled by its increased angle and anterior height of the face, disordered correlations between various parameters. The authors come to a conclusion that progenic occlusion formation in adenoids results from early synostosis of synchondroses at the skull base and from disharmonious development of the entire facial skeleton.