18th July 2023

A 64-year-old woman presents with a 6-month history of dysphagia affecting the ability to swallow both solids and liquids

A 64-year-old woman presents with a 6-month history of dysphagia affecting the ability to swallow both solids and liquids. After meals, she frequently experiences heartburn and sometimes regurgitates undigested food. Despite this, she has managed to maintain a somewhat stable weight by eating small, frequent meals. Abdominal examination of the patient is unremarkable. Given her clinical presentation, you suspect a diagnosis of achalasia.

Which of the following is the gold standard diagnostic test for achalasia?

Select the SINGLE most appropriate option from the list below. Select ONE option only.