Pleura


QUESTION 27.2






A.  Epithelioid



B.  Mixed



C.  Sarcomatoid





  3.  Which histologic type of malignant mesothelioma is shown in this photomicrograph?



Image


QUESTION 27.3




A.  Epithelioid



B.  Mixed



C.  Sarcomatoid




  4.  Which histologic type of malignant mesothelioma is shown in this photomicrograph?



Image


QUESTION 27.4




A.  Epithelioid



B.  Mixed



C.  Sarcomatoid




  5.  A 65-year-old man presents with persistent chest pain and unexplained weight loss. On initial examination, he is found to have a hemorrhagic pleural effusion, which is evacuated. A CT scan reveals irregular pleural thickening. A biopsy of the pleural lesions demonstrates the histopathologic features shown in this photomicrograph. The tumor has diffuse expression of pan-cytokeratin. Which of the following markers, if positive, would support a diagnosis of mesothelioma and rule out adenocarcinoma?



Image


QUESTION 27.5




A.  Cytokeratin 7



B.  Cytokeratin 20



C.  Pancytokeratin



D.  Vimentin



E.  None of the above




  6.  A pleural tumor composed of tubular and papillary structures raises the differential diagnosis between epithelioid mesothelioma and adenocarcinoma. Which of the following immunostains would be positive if the tumor were a mesothelioma?




A.  Ber-EP4



B.  BG-8



C.  Calretinin



D.  Carcinoembryonic antigen (CEA)

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Dec 23, 2016 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Pleura
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