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PAM staining intensity of primary neuroendocrine neoplasms is a potential prognostic biomarker.


ABSTRACT: Neuroendocrine neoplasms (NENs) are rare epithelial tumors with heterogeneous and frequently unpredictable clinical behavior. Available biomarkers are insufficient to guide individual patient prognosis or therapy selection. Peptidylglycine ?-amidating monooxygenase (PAM) is an enzyme expressed by neuroendocrine cells that participates in hormone maturation. The objective of this study was to assess the distribution, clinical associations and survival implications of PAM immunoreactivity in primary NENs. Of 109 primary NENs, 7% were PAM-negative, 25% were PAM-low and 68% were PAM-high. Staining intensity was high in small bowel (p?=?0.04) and low in stomach (p?=?0.004) NENs. PAM staining was lower in higher grade tumors (p?

SUBMITTER: Horton TM 

PROVIDER: S-EPMC7331689 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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PAM staining intensity of primary neuroendocrine neoplasms is a potential prognostic biomarker.

Horton Timothy M TM   Sundaram Vandana V   Lee Christine Hye-Jin CH   Hornbacker Kathleen K   Van Vleck Aidan A   Benjamin Kaisha N KN   Zemek Allison A   Longacre Teri A TA   Kunz Pamela L PL   Annes Justin P JP  

Scientific reports 20200702 1


Neuroendocrine neoplasms (NENs) are rare epithelial tumors with heterogeneous and frequently unpredictable clinical behavior. Available biomarkers are insufficient to guide individual patient prognosis or therapy selection. Peptidylglycine α-amidating monooxygenase (PAM) is an enzyme expressed by neuroendocrine cells that participates in hormone maturation. The objective of this study was to assess the distribution, clinical associations and survival implications of PAM immunoreactivity in prima  ...[more]

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