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(Single Best Answer) Question 51: Ionizing radiation acts on tissue depending upon ?

A) Linear acceleration energy
B) Thermal injury
C) Excitation of electron from orbit
D) Formation of pyrimidine dimers
Answer (Select an option above to get the answer):

(Single Best Answer) Question 52: Which of the following is the most radiosensitive tumor ?

A) Craniopharyngioma
B) Medulloblastoma
C) Astrocytoma
D) Teratoma
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(Single Best Answer) Question 53: Regarding testicular tumors, the following are false except ?

A) They are the commonest malignancy in older men
B) Seminomas are radiosensitive
C) Only 25% of Stage I teratomas are cured by surgery alone
D) Chemotherapy rarely produces a cure in those with metastatic disease
Answer (Select an option above to get the answer):

(Single Best Answer) Question 54: A Warthin's tumor is ?

A) An adenolymphoma of parotid gland
B) A pleomorphic adenoma of parotid gland
C) A carcinoma of the parotid
D) A carcinoma of the submandibular salivary gland
Answer (Select an option above to get the answer):

(Single Best Answer) Question 55: Use of tamoxifen in carcinoma of breast patients does not lead to the following side effects ?

A) Thromboembolic events
B) Endometrial Carcinoma
C) Cataract
D) Cancer in opposite breast
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(Single Best Answer) Question 56: Stereotactic Radio-surgery is a form of ?

A) Radiotherapy
B) Radioiodine therapy
C) Robotic Surgery
D) Cryo Surgery
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(Single Best Answer) Question 57: Which of the following imaging modalities is most sensitive for evaluation of extra-adrenal phaeochromocytoma ?

A) Ultrasound
B) CT
C) MRI
D) MIBG Scan
Answer (Select an option above to get the answer):

(Single Best Answer) Question 58: Sodium-2-mercapto ethane sulfonate (mesna) is used as a protective agent in ?

A) Radiotherapy
B) Cancer chemotherapy
C) Lithotripsy
D) Hepatic encephalopathy
Answer (Select an option above to get the answer):

(Single Best Answer) Question 59: The level of alpha-fetoprotein is raised in all of the following except ?

A) Cirrhosis of liver
B) Hepatocellular carcinoma
C) Yolksac tumor
D) Dysgerminoma
Answer (Select an option above to get the answer):

(Single Best Answer) Question 60: Which of the following is not an oncological emergency ?

A) Spinal cord compression
B) Superior venacaval syndrome
C) Tumor lysis syndrome
D) Carcinoma cervix Stage III 'B' with pyometra
Answer (Select an option above to get the answer):