Term
| What is represented by the "sail sign?" |
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Definition
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Term
| Where is hemomediastinum usually found? |
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Definition
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Term
| T/F: Pneumomediastinum can cause decreased visualization of the aorta. |
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Definition
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Term
| T/F: Pneumomediastinum may be associated with SQ emphysema |
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Definition
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Term
| What is the width of the normal cat mediastinum? Dog? |
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Definition
| Cat: width of vertebrae; Dog: 2x width of vertebrae |
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Term
| Mediastinal masses can be present in _____ locations. |
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Definition
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Term
| What is contained in the mediastinum? |
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Definition
| Trachea, Main-stem bronchi, Esophagus, Major blood vessels, Thymus, Cr mediastinal lnn., Sternal lnn., Perihilar (bronchial) lnn., Heart, Pericardium |
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Term
| T/F: The presence of connective tissue around the organs allows their borders to be sharply defined. |
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Definition
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Term
| Are the lateral edges of masses contrasted sharply against the lung in a Lateral or a VD view? |
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Definition
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Term
| How are the cranial lung lobes displaced in an obese patient? |
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Definition
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Term
| The mediastinum is contiguous cranially w/ _____, & caudally w/ _____. |
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Definition
| Deep fascial planes of neck; Retroperitoneal space |
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Term
| T/F: Inflammation always spreads into & out of the mediastinum from its contiguous structures. |
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Definition
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Term
| T/F: The normal mediastinum contains pockets. |
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Definition
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Term
| T/F: The Rt Cr lung lobe extends well into the Lt hemithorax |
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Definition
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Term
| T/F: The accessory lung lobe lies partly on the Lt side. |
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Definition
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Term
| T/F: The Cd mediastinum is essentially empty. |
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Definition
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Term
| What form the V border of the Cr mediastinum? |
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Definition
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Term
| T/F: Air within the mediastinum is of great clinical significance. |
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Definition
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Term
| What does failure of air to resorb in the mediastinum suggest? |
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Definition
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Term
| What structures become easiest to visualize in the Cr mediastinum in cases of pneumomediastinum? |
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Definition
| Esophagus, Aortic branches, CrVC, azygous v. |
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Term
| What is the tracheoesophageal stripe sign? When is it seen? |
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Definition
| Air outlining the trachea so that both inner & outer aspects of tracheal wall are identified; Pneumomediastinum or dilated esophagus |
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Term
| T/F: Mediastinal swellings & effusions are considered as mass lesions. |
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Definition
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Term
| What can cause displacement of the trachea when no mediastinal mass is present? |
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Definition
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Term
| What is an exception to the intrinsic rigidity of the tracheal rings preventing compression of the trachea? |
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Definition
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Term
| When mediastinal lesions displace & compress the trachea & mainstem bronchi, what is a common presenting sign? |
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Definition
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Term
| What may be the best indication of lesions when pleural effusion hides the mediastinum? |
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Definition
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Term
| T/F: Edema of the head & neck is a secondary sign of a Cr mediastinal mass. |
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Definition
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Term
| Where is contrast medium injected for a venogram to identify a mediastinal mass? |
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Definition
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Term
| In patients w/ distended pulmonary aa. (dirofilariasis) or lymphadenopathy, the trachea may develop a _____ @ the ____. |
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Definition
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Term
| T/F: Lymphosarcoma is one of the most common causes of perihilar lymphadenopathy. |
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Definition
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Term
| In which direction does LA enlargement displace main stem bronchi? |
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Definition
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Term
| What may be necessary to determine whether a radiolucent esophageal foreign body is present? What else can be assessed? |
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Definition
| Esophogram; Perforation of the esophageal wall |
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Term
| If esophageal obstruction is present just Cr to the cardia, which view is usually more informative? |
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Definition
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Term
| T/F: Hiatal hernias of the stomach are consistently present. |
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Definition
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Term
| T/F: Paraesophageal hernia is a common cause of Cd mediastinal mass lesion. |
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Definition
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Term
| T/F: Barium passage is totally obstructed w/ a gastroesophageal intussusception. |
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Definition
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Term
| T/F: Caudoventral mediastinal lesions are common. |
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Definition
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Term
| Absence of what borders is a clue to an accessory lung lobe lesion? |
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Definition
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Term
| What is the most obvious radiographic sign of mediastinal shift? |
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Definition
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