Over-expression of bcl-2 in lymphocytes has an important role in some immunological and inflammatory diseases. Fas (CD95) is a cell surface molecule that mediates receptor-triggered apoptosis in various cells including autoreactive T cells. In this study we investigated bcl-2 and Fas (CD95) expression in dermal lymphocytes in active skin lesions of Beh et s disease (BD) and in skin biopsy samples with chronic, non-specific inflammations. Tissue sections of 29 skin lesions of Beh et s disease and of 10 chronic non-spesific inflammatory process cases from the archives of the Ondokuz Mayis University s Pathology Department were immunohistochemically stained for bcl-2 and Fas (CD95), and lymphocytes in the dermal infiltrate were evaluated for cytoplasmic staining, bcl-2 staining was observed in the skin lesions of 22 cases (75.8% ) of Beh et s disease. bcl-2 staining was detected in two (20% ) control skin biopsy samples with non-specific chronic inflammation. Fas (CD95) positivity was not detected in lymphocytes in Beh et s disease-related skin lesions. Fas (CD9) staining was observed in only three skin biopsy samples with non-specific chronic in-flammation. bcl-2 and Fas (CD95) staining values in Beh et s and non-specific inflammation groups were significantly different (P<0.01); differences in the bcl-2 staining values between Behc?et s patients with mucocutaneous involvement only and mucocutaneous and other systemic involvements were not significant (P >0.05) . Expression of bcl-2 and loss of Fas (CD95) expression in dermal lymphocytesmay play a role in the development of skin lesions and may account for the chronic course with periodic exacerbations in BD. Over-expression of bcl-2 in lymphocytes has an important role in some immunological and inflammatory diseases. Fas (CD95) is a cell surface molecule that mediates receptor-triggered apoptosis in various cells including autoreactive T cells. In this study we investigated bcl- 2 and Fas (CD95) expression in dermal lymphocytes in active skin lesions of Beh et s s disease (BD) and in skin biopsy samples with chronic, non-specific inflammations. Tissue sections of 29 skin lesions of Beh et s s disease and of 10 chronic non-spesific inflammatory process cases from the archives of the Ondokuz Mayis University’s Pathology Department were immunohistochemically stained for bcl-2 and Fas (CD95), and lymphocytes in the dermal infiltrate were evaluated for cytoplasmic staining, bcl-2 staining was observed in the skin lesions of 22 cases (75.8%) of Beh et s s disease. bcl-2 staining was detected in two (20%) control skin biopsy samples with non-specific chronic inflammation. 5) positivity was not detected in lymphocytes in Beh et s s disease-related skin lesions. Fas (CD9) staining was observed in only three skin biopsy samples with non-specific chronic in-flammation. Bcl-2 and Fas (CD95) staining values ​​in Beh et s s and non-specific inflammation groups were significantly different (P <0.01); differences in the bcl-2 staining values ​​between Behc? et s s patients with mucocutaneous involvement only and mucocutaneous and other systemic involvements were not significant (P> 0.05). Expression of bcl-2 and loss of Fas (CD95) expression in dermal lymphocytes play play a role in the development of skin lesions and may account for the chronic course with periodic exacerbations in BD.