A 50-year-old female presented for routine colonoscopy. She mentioned that she is often tired, but otherwise well. She is 5’5’’ and 63 kg, and she has conjunctival pallor. Colonoscopy reveals dark brown to black discoloration in a moire pattern lining the large intestine.

What can be the probable diagnosis? *This patient case is from Docplexus Editorial Team for educative purposes only. Source: Clinical Advisor The answer is posted in the comment section. click here.