Fig. 1

p27^kip1 expression in Squamous cell carcinoma. a & b. High expression of p27^kip1, showing diffuse nuclear positivity of p27^kip1; c & d. Low expression of p27^kip1, only a few tumor cells showing mild nuclear positivity for p27^kip1, majority of tumor cells revealing loss of expression . Lymphocytes serve as positive control