A gyulladásos bélbetegséggel (IBD) élő betegekben a colorectalis carcinoma kialakulásának esélye az átlagpopulációban észleltek kétszerese. Az invazív daganatokat megelőzően ezekben a betegekben nagyobb a rizikó dysplasia kialakulására is. Az utóbbi években számos, IBD-hez társult, ún. non-conventionalis dysplasia altípust azonosítottak, melyekről a jelenleg is zajló kutatásoknak köszönhetően egyre több információval rendelkezünk. Egy 62 éves, 14 éve relabáló colitis ulcerosával diagnosztizált és kezelt nőbeteg subtotalis colectomiás preparátumában colitis ulcerosa mellett a sigmabélben invazív adenocarcinomát azonosítottunk mucinosus területekkel. A daganat közvetlen környezetében kehelysejtszegény, valamint hypermucinosus IBD-hez társult, non-conventionalis dysplasiát észleltünk, az utóbbinak intestinalis és foveolaris altípusa is elkülöníthető volt. A felhalmozódó ismeretek tükrében az IBD-hez társult, non-conventionalis dysplasiák ismerete több szempontból is fontos lehet a diagnosztikában és a klinikai ellátásban, ugyanis ezek a laesiók makroszkóposan laposak vagy láthatatlanok lehetnek, megnehezítve a dysplasia endoszkópos szűrését. Ismeretük a patológus számára kiemelten fontos, hiszen a reaktív és reparatív folyamatoktól való elkülönítésük sokszor nagy kihívást jelent. Továbbá, a hagyományos típusoknál gyakrabban társultak ’high-grade’ dysplasiával, valamint colorectalis carcinomával. Molekuláris hátterüket tekintve, sokkal gyakrabban észlelhető bennük aneuploidia. Mindezen ismeretek a hagyományos neoplasiákhoz képest rosszabb prognózis rizikót vetítenek elő, és az esetlegesen nehezen azonosítható endoszkópos képüket is figyelembe véve felismerésük után az IBD-s betegek szorosabb utánkövetése és esetleges véletlenszerű biopsziás mintavétel mérlegelendő. Orv Hetil. 2023; 164(51): 2039–2044.
Patients with inflammatory bowel disease (IBD) are twice as likely to develop colorectal carcinoma as the general population. In addition to invasive malignancy, these patients are also more likely to develop dysplasia, as well. In recent years, several subtypes of the so-called IBD-associated, non-conventional dysplasias have been identified, and the amount of information about these laesions show an increasing tendency, due to the many ongoing investigations. We present the case of a 62-year-old woman, diagnosed and treated with relapsing ulcerative colitis for 14 years. In the patient’s subtotal colectomy specimen, alongside ulcerative colitis, invasive adenocarcinoma with mucinous areas of the sigmoid colon was identified. In the immediate vicinity of the tumor, we observed goblet cell-deficient and hypermucinous, IBD-associated, non-conventional dysplasia, the latter with distinct intestinal and foveolar subtypes. IBD-associated, non-conventional dysplasias certainly require increased attention in both diagnostics and clinical routine, as these laesions may be flat, and difficult to detect by the examiner during endoscopy. The recognition of these lesions is of great importance for the pathologist, as their differentiation from reactive and reparative processes is often challenging. They are more often associated with high-grade dysplasia and colorectal carcinoma, and may also be possible precursors of invasive carcinoma. Regarding their molecular background, they are more often associated with aneuploidy. All these factors indicate a higher prognostic risk compared to conventional neoplasms, and, given their potentially difficult endoscopic appearance, closer follow-up and possible random biopsy sampling of IBD patients is recommended. Orv Hetil. 2023; 164(51): 2039–2044.
Shah SC, Itzkowitz SH. Management of inflammatory bowel disease-associated dysplasia in the modern era. Gastrointest Endosc Clin N Am. 2019; 29: 531–548.
Katsanos KH, Vermeire S, Christodoulou DK, et al. Dysplasia and cancer in inflammatory bowel disease 10 years after diagnosis: results of a population-based European collaborative follow-up study. Digestion 2007; 75: 113–121.
Gordon H, Biancone L, Fiorino G, et al. ECCO guidelines on inflammatory bowel disease and malignancies. J Crohns Colitis 2023; 17: 827–854.
Choi WT, Yozu M, Miller GC, et al. Nonconventional dysplasia in patients with inflammatory bowel disease and colorectal carcinoma: a multicenter clinicopathologic study. Mod Pathol. 2020; 33: 933–943.
Akarca FG, Yozu M, Alpert L, et al. Non-convetional dysplasia is frequently associated with low-grade tubuloglandular and mucinous adenocarcinomas in inflammatory bowel disease. Histopathology 2023; 83: 276–285.
Choi WT. Non-conventional dysplastic subtypes in inflammatory bowel disease: a review of their diagnostic characteristics and potential clinical implications. J Pathol Transl Med. 2021; 55: 83–93.
Wen KW, Umetsu SE, Goldblum JR, et al. DNA flow cytometric and interobserver study of crypt cell atypia in inflammatory bowel disease. Histopathology 2019; 75: 578-588.
Gui X, Köbel M, Ferraz JG, et al. Histological and molecular diversity and heterogeneity of precancerous lesions associated with inflammatory bowel diseases. J Clin Pathol. 2020; 73: 391–402.
Choi WT, Kővári BP, Lauwers GY. The significance of flat/invisible dysplasia and nonconventional dysplastic subtypes in inflammatory bowel disease. A review of their morphologic, clinicopathologic, and molecular characteristics. Adv Anat Pathol. 2022; 29: 15–24.
Laine L, Kaltenbach T, Barkun A, et al. SCENIC international consensus statement on surveillance and management of dysplasia in inflammatory bowel disease. Gastroenterology 2015; 148: 639–651.e28.
Choi WT, Salomao M, Zhao L, et al. Hypermucinous, goblet cell-deficient and crypt cell dysplasias in inflammatory bowel disease are often associated with flat/invisible endoscopic appearance and advanced neoplasia on follow-up. J Crohns Colitis 2022; 16: 98–108.
Lee H, Rabinovitch PS, Mattis AN, et al. Non-conventional dysplasia in inflammatory bowel disease is more frequently associated with advanced neoplasia and aneuploidy than conventional dysplasia. Histopathology 2021; 78: 814–830.
Kővári B, Clauditz T, Kamaradova K, et al. Hypermucinous dysplasia in inflammatory bowel disease: a heterogeneous condition with frequent foveolar differentiation. Mod Pathol. 2022; 35(Suppl 2): 481–482.
Kamarádová K, Vošmiková H, Rozkošová K, et al. Non-conventional mucosal lesions (serrated epithelial change, villous hypermucinous change) are frequent in patients with inflammatory bowel disease. Results of molecular and immunohistochemical single institutional study. Virchows Arch. 2020; 476: 231–241.