Polyneoplasia was described in various oncologic pathology.The joint action of different oncogenic factors is being discussed.The objective of our investigation was to estimate the frequency of polyneoplasia occurence in dermatological practice.The retrospective analysis of the data of 56 patients(average age 64,4±0,5 years) was performed.32 patients suffered from basal cell carcinoma(BCC),15 patients suffered from squamous cell carcinoma(SCC),9 patients suffered from T-cell cutaneous lymphoma(TCL).In 4 patients with BCC oncologic diseases of inner organs (stomach cancer,lung cancer,sigmoid cancer,pancreas cancer)were diagnosed in 4±0,5 years before  BCC detection.In a patient with SCC uterine cancer was diagnosed in 4 months before SCC detection.In a patient with TCL breast cancer was revealed in a year after TCL was diagnosed.So, in 6 (10,7%) patients among 56 patients polyneoplasia developed.The joint action of different oncogenic factors seems to be crucial in such cases.

POLYNEOPLASIA IN DERMATOLOGICAL PRACTICE