Mucinous cystic neoplasm pancreas is a benign or low grade, potentially malignant, cystic neoplasm arising from pancreatic epithelial layer constituted of epithelial cells containing intracytoplasmic mucin World Health Organization (WHO) classifies mucinous cystic neoplasm pancreas as. a) Mucinous Cystic Neoplasm (MCN) with low grade dysplasia or adenoma. b) Mucinous Cystic Neoplasm (MCN) with high grade dysplasia or carcinoma in situ. c) Mucinous Cystic Neoplasm (MCN) with invasive carcinoma.