PRIMARY GASTROINTESTINAL SYSTEM LYMPHOMA: ANALYSIS OF EIGHT PATIENTS IN A SINGLE-CENTER COHORT. - İstemihan, Zülal; Yağlı, Mehmet Akif; Telli, Pelin; Dağcı, Gizem; Genç Uluçeçen, Sezen; Çavuş, Bilger; Çifcibaşı Örmeci, Aslı; Akyüz, Filiz; Demir, Kadir; Beşışık, Fatih; Kaymakoğlu, Sabahattin (Journal of Istanbul Faculty of Medicine / İstanbul Tıp Fakültesi Dergisi, 2026)