Which of the following statement(s) is/are true concerning radiologic examinations used for the assessment of hepatic neoplasms?
belongs to book: ASIR SURGICAL MCQs BANK|Dr. Gharama Al-Shehri|1st edition| Chapter number:7| Question number:123
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a.Magnetic resonance imaging is considered the test of choice for distinguishing hemangiomas from other mass lesions
b.Dynamic CT scanning is the dominant imaging modality for routine screening and diagnosis
d.CT angio-portography (CTAP) is the gold standard for early detection of metastatic hepatic lesions
In the Western world, the test most commonly used for screening, detection, and diagnosis of hepatic neoplasms are dynamic bolus-enhanced CT scan, MRI, and ultrasound. Dynamic CT scanning remains the dominant imaging modality for routine screening and diagnosis because it is sensitive, widely available, provides helpful anatomic information and allows the evaluation of other intraabdominal structures in the detection of extrahepatic disease. The most sensitive test for the detection of liver masses is CTAP, however, like angiography is generally reserved for preoperative evaluation of resectability and not for screening. Hepatic MRI imaging is another useful tool in the detection and diagnosis of the liver lesions, with sensitivities equal to that of CT. MRI with T1 and T2-weighted images and gadilinium enhancement can aid in the differential diagnosis of a mass. For example, MRI is now considered the test of choice for distinguishing hemangiomas from other mass lesions. Radionucleotide imaging is less sensitive and specific than CT, MRI, or ultrasound, and has a high percentage of false-positive and false-negative results. Therefore, nuclear medicine scans play a limited role in modern screening and detection, but they can help differentiate discrete masses.
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