[Streptococcus mutans: its relation to cariogenic activity].

This research was carried out with the purpose of learning about relationship between degree of infection by Streptococcus mutans in saliva and prevalence of caries and further incidence in a one year term. A total of 931 children aged 2-3 years of Havana City and Sancti Spiritus Province, and 10 different series of school children aged 6-12 years of both provinces, with a total of 848 children, were studied. A direct significant relationship between degree of infection by S.

Erosive lichen planus and fibroxanthosarcoma (malignant fibrohistiocytoma): coincidence or association?

Severe erosive lichen planus of the skin and oral and anal mucosae coincided with retroperitoneal fibroxanthosarcoma (malignant fibrohistiocytoma) in an asthmatic patient. Clinical evolution after surgical removal of the tumor, radiotherapy, and chemotherapy was favorable, with great improvement of the lichen planus and the asthma. The exact nature of the relationship between erosive lichen planus and tumors is not known, but there is circumstantial evidence that their coexistence is not just a fortuitous coincidence.