Shibata H, Ohike N, Norose T, Isobe T, Suzuki R, Imai H, Shiokawa A, Aoki T, Murakami M, Mizukami H, Tanaka JI, Takimoto M. Mucinous Cystic Neoplasms Lined by Abundant Mucinous Epithelium Frequently Involve KRAS Mutations and Malignant Progression.
Anticancer Res 2017;
37:7063-7068. [PMID:
29187496 DOI:
10.21873/anticanres.12178]
[Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/03/2017] [Accepted: 10/12/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND
Pancreatic and hepatic mucinous cyst neoplasms (MCNs) have a malignant potential, but indolent MCNs are not uncommon.
MATERIALS AND METHODS
The pathological and genetic characteristics of resected MCNs (n=15) categorized by the amount of mucin of the lining epithelium were investigated.
RESULTS
MCNs were divided into two groups: (i) a rich (r)-MCN group (n=6), in which more than half of the epithelium was lined by abundant mucinous epithelium; and (ii) a poor (p)-MCN group (n=9), which consisted of the remaining cases. Three patients in the r-MCN group showed invasive carcinoma or high-grade dysplasia, whereas all patients in the p-MCN group showed low-grade dysplasia. Mutations of Kirsten rat sarcoma viral oncogene homolog (KRAS) were more frequent in the r-MCN group (83%) (p-MCN; 11%, p<0.05).
CONCLUSION
Mucinous MCNs more frequently have KRAS mutations and higher risk of malignant progression.
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