**Question:** Triad of Plummer Vinson syndrome includes all of the following except:

A. Patterned dysphagia
B. Iron deficiency anaemia
C. Esophageal webs
D. Upper respiratory infections

**Core Concept:** Plummer Vinson syndrome, also known as Patterned dysphagia syndrome, is a clinical entity characterized by dysphagia (difficulty swallowing), iron deficiency anaemia, and esophageal webs (cobweb-like protrusions in the esophagus).

**Why the Correct Answer is Right:** Dysphagia is the main symptom in Plummer Vinson syndrome caused by the presence of esophageal webs that compress the food column during swallowing. Iron deficiency anaemia is a secondary consequence due to the reduced intake of nutrients required for erythropoiesis. In contrast, upper respiratory infections are unrelated to the primary pathophysiology of the syndrome and thus are not included in the triad.

**Why Each Wrong Option is Incorrect:**

A. Patterned dysphagia: This is the primary symptom of Plummer Vinson syndrome and is caused by the webs in the esophagus. So, this option is incorrect.

B. Iron deficiency anaemia: This is a secondary consequence of the reduced intake of nutrients required for erythropoiesis, which occurs due to dysphagia. However, it is still a feature of Plummer Vinson syndrome, so this option is incorrect.

C. Upper respiratory infections: These are unrelated to the primary pathophysiology of the syndrome, which involves webs in the esophagus causing dysphagia. So, this option is incorrect.

**Clinical Pearl:** The triad of Plummer Vinson syndrome highlights the importance of considering iron deficiency anaemia as a potential cause of dysphagia in patients with a history of chronic dysphagia and investigating for esophageal webs. This is crucial for timely diagnosis and management of the condition.