This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: ENT
All are true about Plummer vinson syndrome except - 
Select and explain. 
A. Dysphagia, B. Oesophageal web, C. Iron deficiency, D. Kidney disease
D: Kidney disease
Answer: D: Kidney disease 
Explanation: Ans. is 'd' i.e., Kidney disease Plummer-Vinson syndrome* Plummer-Vinson syndrome, also known as Brown-Kelly-Paterson syndrome or sederopenic dysphagia, seen in middle aged edentulous women.* The plummer Vinsion Paterson Brown Kelly Syndrome is characterized by: -# Dysphagia# Chronic iron deficiency anemia# Atrophic oral mucosa and glossitis# Brittle, spoon-shaped fingernails (Koilonychia)* The cause of dysphagia is usually a cervical esophageal web, but abnormal pharyngeal and esophageal motility may play a role.* The syndrome characterstically occurs in middle aged edentulous (without teeth) women.* It is a premalignant lesion. Approximately 10% of patient develop squamous cell Ca of esophagus, oral cavity or the hypopharynx.* As iron-deficiency anemia is a common finding, it is also known as sideropenic dysphagia.* Carcinoma develops in post-cricoid region (not in lower third esophagus).