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MKSAP: 78-year-old man with symptoms of dysphagia

mksap
Conditions
June 9, 2018
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Test your medicine knowledge with the MKSAP challenge, in partnership with the American College of Physicians.

A 78-year-old man is evaluated for symptoms of dysphagia that began 2 weeks ago. When he eats, he starts coughing after the first bite of food and occasionally has nasal regurgitation.

On physical examination, blood pressure is 135/90 mm Hg, pulse rate is 78/min, and respiration rate is 12/min. Left-sided weakness is noted in both extremities, upper greater than lower.

Which of the following is the most appropriate diagnostic test to evaluate this patient’s dysphagia?

A. Barium swallow
B. Esophageal manometry
C. Upper endoscopy
D. Videofluoroscopy

MKSAP Answer and Critique

The correct answer is D. Videofluoroscopy.

The most appropriate diagnostic test to evaluate this patient’s dysphagia is videofluoroscopy. Dysphagia is classified as either oropharyngeal dysphagia (also called transfer dysphagia) or esophageal dysphagia. Each of the two kinds of dysphagia has distinct epidemiology, pathophysiology, and management implications. Oropharyngeal dysphagia usually occurs immediately with deglutition. Causes of oropharyngeal dysphagia may be either neuromuscular or anatomic. Patients may have associated symptoms that provide clues, such as neurologic symptoms like dysphonia, diplopia, and muscular weakness. When this patient starts to eat he coughs, which indicates oropharyngeal impairment of the swallowing mechanism rather than an esophageal cause. Patients with oropharyngeal dysphagia typically describe coughing, choking, and nasal regurgitation. Choking occurs owing to failure to clear food from the epiglottis and may lead to aspiration. The initial test of choice for evaluation of oropharyngeal dysphagia is videofluoroscopy (also known as a modified barium swallow) in which the oropharyngeal phase of swallowing is assessed with foods of different consistencies. Oropharyngeal forms of dysphagia are often managed with dietary adjustment and incorporation of swallowing exercises with the assistance of a speech pathologist.

Barium swallow may be useful in the evaluation of esophageal dysphagia following a normal upper endoscopy when a mechanical obstruction is still suspected. For example, upper endoscopy may miss lower esophageal rings or extrinsic compression of the esophagus. A barium swallow will not be as helpful as videofluoroscopy in a patient with oropharyngeal dysphagia.

Esophageal dysphagia tends to occur after the initiation of the swallow. Esophageal manometry is useful to diagnose an esophageal motility disorder such as achalasia. However, it is not the best test in a patient with symptoms of oropharyngeal dysphagia.

Esophageal dysphagia often has an intraluminal cause, such as strictures, Schatzki rings, or masses. The diagnostic test of choice for esophageal dysphagia is upper endoscopy, which can be both diagnostic (allowing biopsy and visualization of the mucosa) and therapeutic (allowing dilation to be performed if indicated).

Key Point

  • The initial test of choice for evaluation of oropharyngeal dysphagia is videofluoroscopy.

This content is excerpted from MKSAP 17 with permission from the American College of Physicians (ACP). Use is restricted in the same manner as that defined in the MKSAP 16 Digital license agreement. This material should never be used as a substitute for clinical judgment and does not represent an official position of ACP. All content is licensed to KevinMD.com on an “AS IS” basis without any warranty of any nature. The publisher, ACP, shall not be liable for any damage or loss of any kind arising out of or resulting from use of content, regardless of whether such liability is based in tort, contract or otherwise.

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