Figure 2.
A/B carcinoma. (A) A/B carcinoma showing mucinous differentiation of malignant tumor cells. (B) A/B carcinoma with tubule formation and squamous differentiation of tumor cells. (C) Large, invasive A/B carcinoma. (D) Higher magnification of tumor in 2C showing piling of anaplastic tumor cells. (E) Atypical hyperplasia of the lung. (F) Higher magnification of 2E, with pronounced areas of fibrosis and inflammation. H & E. A: B6 mouse, high-dose female (HF), butadiene; B: B6 mouse, HF, 1,2 dibromoethane; C, D: F344/N rat, HM, methylene blue trihydrate; E, F: F344/N rat, HF, cobalt sulfate heptahydrate.