46. Which of the following description about angiosarcoma is Wrong? (A) chronic arsenic intoxication is associated with angiosarcoma (B) The preceding lesions of angiosarcoma are different according to the etiology (C) Portal hypertension may be already evident in the preceding lesion (D) CD31 or CD34 are useful diagnostic markers

43. Which of the following description about exocrine pancreatic carcinoma is Wrong (A) The spindle tumor cells of undifferentiated carcinoma of pancreas are positive for cytokeratin, but always negative for vimentin (B) the average size of tumors at the pancreatic head region is usually smaller than tail region (C) Acinar cell carcinoma of pancreas has better survival in pediatric patients than adult patients (D) The osteoclast-like giant cells in the undifferentiated carcinoma with osteoclast like giant cells (UC-OGC) of pancreas is considered as benign in nature

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