Personality traits between two female groups suffering cancer with different symptomatology and treatment are compared. The authors study 59 female patients: 35 with breast cancer and 24 with hematologic neoplasia. The MMPI Inventory and the Scale to Measure of Aggression by Ledesma et al were studied. It has been found that there are similar personality traits in both groups although there are some significant differences. The group with breast cancer showed an increase both in the MMPI Si scale (Social introversion) and in self aggression with respect to the hematologic neoplasia group. On the other hand, the patients with hematologic cancer showed an increase of the hypochondria, depression and paranoia as well as hetero aggression.