With regard to the recent report by da Silva Rocha et al 1 on peripheral compound odontoma, we would like to make some comments. Currently, this type of developmental anomaly is inadequately defined, and none of the diagnostic designations have so far proved satisfactory. However, for the purposes of this review, we will use the term "peripheral developing odontoma" (PDO), which emphasizes its origin (gingiva), nature (hamartoma) and histopathology (disordered formation of the supernumerary tooth germ). da Silva Rocha et al 1 listed 18 published cases of PDO, which Sciences,