“necklace<br/>sign” can be seen in____ A: the<br/>gastric carcinoma; B: the<br/>gastric ulcer; C: duodenum<br/>ulcer D: esophagus<br/>carcinoma; E: rectal<br/>carcinoma

原位癌(carcinoma in situ)即

浸润性小叶癌(invasive lobular carcinoma)

甲状腺髓样癌(medullary carcinoma of thyroid)

原位癌与浸润癌(infiltration carcinoma)的主要区别在于

Air pollution may cause() A: Dermatitisb. B: Carcinoma bronchus C: Bronchiectasis D: Pneumonia

Air pollution may cause () A: Dermatitis B: Carcinoma<br/>bronchus C: Bronchiectasis D: Pneumonia

One of the most common sexually transmitted diseases that may lead to cervical carcinoma is caused by which of the following viruses? ____________

A 40-year-old woman has noted enlargement of her anterior neck region over the past 8 months. On physical examination her vital signs include T 36.8°C， P 64/minute， RR 16/minute， and BP 155/105 mm Hg. There is diffuse， symmetrical thyroid enlargement without tenderness. A chest radiograph is normal. Fine needle aspiration of the thyroid yields cells consistent with a neoplasm. Laboratory studies show that she is euthyroid， but her serum ionized calcium is elevated. She is taken to surgery and frozen sections of several thyroid masses show a malignant neoplasm composed of polygonal cells in nests. A thyroidectomy is performed. Immunostaining for calcitonin of the permanent sections is positive， and the neoplasm has an amyloid stroma with Congo red staining. Which of the following neoplasms is she most likely to have？（ ） A: Anaplastic carcinoma B: Medullary carcinoma C: Papillary thyroid carcinoma D: Metastatic renal cell carcinoma E: Parathyroid carcinoma

Which of the tumors is derived from the three germ cell layers? A: Teratoma B: Adenosquamous carcinoma C: Pleomorphic adenoma D: Carcinosarcoma