As the pedodontists rather frequently encounter cases of the congenital abnor-malities or developmental anomalies in their daily practice, it is essential that they should possess an adequate knowledge of those anomalies in order to give proper diagnosis and establish effective treatment planning. Recently, we have observed a case of pycnodysostosis in a ten-year-six-month old girl, whose dental characteristics provide some additional findings to those already pointed out by previous investigators in the field. The pycnodysostosis was first defined by MAROTEAUX-LAMY  as an independent entity which differs from Albers-Schonberg disease in points of the anomaly of cranial, peripheral bone and the mandible. Since MAROTEAUX-LAMY first reported on this in 1962, other case reports were followed by SHULER  in 1963, STANESCO  in 1964, and WIEDEMANN  in 1965. As the first effort by a domestic researcher, the one by MURAKAMI et al.  was the presentation of systemic findings on the same patient as reported in this paper.
An interesting case of carcinoma of the tongue has been reported, which represents a large number of fine calcium granules deposited mostly inside the nuclei of innumerable tumor cells in groups or in partial fusion. Sporadic massive calcium deposition is additionally found in areas frequently showing higher cornification.