Is There a Relationship between the Staining Pattern of Classical Neuroendocrine Markers and Clinicopathological Findings in Neuroendocrine Tumors of the Appendix?

Objective: This study investigates the association between staining patterns of classical neuroendocrine markers, synaptophysin (Snp) and chromogranin-A (Chr), and clinicopathological findings in appendiceal neuroendocrine tumors (NETs).These tumors, often diagnosed incidentally post-appendectomy, pose diagnostic challenges due to their diverse histomorphologic patterns.The study aims to enhance understanding of the relationship between staining patterns and key pathological parameters.Methods: A retrospective analysis included 28 cases of appendiceal NETs diagnosed over an 8-year period.Histopathological features, including grade, lymphovascular invasion, stage, localization, size, Ki67 proliferation index, and morphological pattern, were reassessed.Immunohistochemical staining of Snp and Chr was examined for extensity and intensity in NET areas. Results:The study comprised 17 female and 11 male patients, with a mean age of 34 years.Histomorphological patterns included small nests, large nests, and trabecular-palisading patterns.Statistically significant correlations were observed between Snp staining intensity and tumor size, and Chr staining extensity and histomorphologic patterns.Chr staining extensity exceeding 95% was identified in all cases with large nest patterns.Additionally, Z Ama: Bu almada, apendiks nroendokrin tmrlerinde (NET) klasik nroendokrin belirteler olan sinaptofizin (Snp) ve kromogranin-A (Chr) boyanma paternleri ile klinikopatolojik bulgular arasndaki iliki aratrlmtr.Genellikle apendektomi sonras tesadfen tehis edilen bu tmrler, eitli histomorfolojik paternleri nedeniyle tansal zorluklar oluturmaktadr.Bu alma, boyanma paternleri ile anahtar patolojik parametreler arasndaki ilikinin daha iyi anlalmasn amalamaktadr.Yntemler: Retrospektif bir analiz, 8 yllk bir sre iinde tan konulan 28 apendiks NET olgusunu iermektedir.Derece, lenfovaskler invazyon, evre, lokalizasyon, boyut, Ki67 proliferasyon indeksi ve morfolojik patern dahil olmak zere histopatolojik zellikler yeniden deerlendirildi