Dysphagia lusoria is because of –
**Core Concept**
Dysphagia lusoria is a rare condition characterized by difficulty swallowing due to the compression of the esophagus by an aberrant right subclavian artery. This phenomenon is often associated with vascular anomalies and is a classic example of how unusual anatomical variations can lead to significant clinical consequences.
**Why the Correct Answer is Right**
The aberrant right subclavian artery arises from the left side of the aortic arch and passes behind the esophagus, often compressing it and leading to dysphagia. This compression can be exacerbated by swallowing, which increases the pressure within the esophagus. The term "lusoria" refers to the unusual or aberrant nature of this arterial anomaly. The compression can be severe enough to cause significant symptoms, including dysphagia, regurgitation, and even weight loss.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because dysphagia lusoria is not caused by a neurological disorder. While neurological conditions can cause dysphagia, the specific cause of dysphagia lusoria is a vascular anomaly.
* **Option B:** This option is incorrect because dysphagia lusoria is not caused by a structural problem with the esophagus itself. The esophagus is compressed by an external structure, the aberrant right subclavian artery.
* **Option C:** This option is incorrect because dysphagia lusoria is not caused by a malignancy. While cancer can cause dysphagia, the specific cause of dysphagia lusoria is a rare vascular anomaly.
**Clinical Pearl / High-Yield Fact**
Dysphagia lusoria is a classic example of how unusual anatomical variations can lead to significant clinical consequences. It is essential for clinicians to be aware of this condition, especially when evaluating patients with dysphagia who have a history of vascular anomalies.
**Correct Answer: A. Aberrant right subclavian artery.**