A patient comes with dysphagia and regurgitation. Manometry shows ineffective contractions in the Lower esophagus. Which of the following will not cause this condition
**Core Concept**
The patient's symptoms of dysphagia and regurgitation, combined with ineffective contractions in the Lower esophagus on manometry, point to a diagnosis of achalasia. Achalasia is a motility disorder characterized by the failure of the Lower Esophageal Sphincter (LES) to relax, leading to impaired esophageal emptying. This is often due to degeneration of the myenteric plexus, a network of neurons controlling esophageal peristalsis.
**Why the Correct Answer is Right**
Achalasia results from the degeneration of the myenteric plexus, leading to a loss of coordinated peristaltic contractions in the esophagus. The LES fails to relax, causing food to accumulate in the esophagus, leading to dysphagia and regurgitation. This is a classic presentation of achalasia, which is often diagnosed with esophageal manometry showing ineffective contractions in the Lower esophagus.
**Why Each Wrong Option is Incorrect**
**Option A:** Scleroderma can cause achalasia due to the fibrosis and degeneration of the myenteric plexus, making it an incorrect option.
**Option B:** Gastroesophageal reflux disease (GERD) is often associated with ineffective LES relaxation, but it typically presents with symptoms of heartburn and regurgitation, not achalasia. However, GERD can be a result of achalasia.
**Option C:** Chagas disease, caused by the parasite Trypanosoma cruzi, can lead to achalasia through the destruction of the myenteric plexus.
**Option D:** Corrosive esophagitis can cause stricture formation and dysphagia, but it is not directly associated with ineffective contractions in the Lower esophagus.
**Clinical Pearl / High-Yield Fact**
Achalasia is often associated with a "bird's beak" appearance on barium swallow due to the dilated esophagus and narrowed LES.
**Correct Answer:** D. Corrosive esophagitis.