**Question:** Not true about Plummer-Vinson syndrome is -

A. It is a condition caused by iron deficiency anemia
B. It is characterized by dysphagia, koilonychias, and esophageal webs
C. It is more common in males than females
D. It is a rare condition with a low prevalence

**Correct Answer:** C. It is more common in males than females

**Core Concept:** Plummer-Vinson syndrome, also known as Paterson-Brown Kelly syndrome, is a rare clinical condition characterized by dysphagia (difficulty swallowing), koilonychias (spoon-shaped nails), and esophageal webs (thin, filiform formations in the esophagus). This condition is primarily observed in females and is associated with iron deficiency anemia.

**Why the Correct Answer is Right:** The correct answer is "more common in females" because Plummer-Vinson syndrome is predominantly observed in women, particularly those with iron deficiency anemia. The condition results from the depletion of iron stores, leading to the manifestation of its clinical features. The pathogenesis involves the weakening of the esophageal mucosa and submucosa, causing the formation of webs and dysphagia.

**Why Each Wrong Option is Incorrect:**

A. Iron deficiency anemia is the primary cause of Plummer-Vinson syndrome, and it is females who are mostly affected by this condition. However, the statement "It is a condition caused by iron deficiency anemia" is incorrect, as the syndrome itself is caused by the iron deficiency, not anemia.

B. This option is incorrect because Plummer-Vinson syndrome is more common in females, not males. The condition is associated with iron deficiency anemia, which is more likely to affect females due to factors such as menstruation, pregnancy, and iron-absorption issues in the gastrointestinal tract.

C. The statement "It is more common in males" is incorrect, as Plummer-Vinson syndrome is more prevalent in females due to the factors mentioned above.

D. The prevalence of Plummer-Vinson syndrome is generally low, but this option is incorrect as the question asks for the incorrect statement regarding the gender distribution, not the overall prevalence of the condition.

**Clinical Pearl:** Plummer-Vinson syndrome is a rare clinical entity that predominantly affects females due to iron deficiency anemia-related factors. Understanding the gender distribution is essential for healthcare professionals to promptly diagnose and treat this condition in affected patients.