Hello.
Thanks for writing to us with your health concern.
I am Dr.R.K and I am pleased to assist you.
Difficulty in swallowing in an elderly lady could be due to esophageal malignancy. There are benign causes as well like a peptic stricture or a motility disorder of esophagus.
I would advise her to get an upper GI endoscopy done to inspect the inside of the food pipe for any obstruction caused by malignancy or a benign stricture. She can consult a gastroenterologist for endoscopy.
Alternatively a barium swallow x-ray may be done to find the cause of this symptom.
I hope that answers your question.
Let me know if I can assist you further.
Regards,
Dr.R.K