Zusammenfassung
Bis in die jüngste Zeit wurden 2 Hauptformen epithelialer Polypen im Kolorektum unterschieden: Adenome und hyperplastische Polypen. Während Adenome aufgrund ihrer zytologischen Dysplasie bzw. intraepithelialen Neoplasie (IEN) als Vorläuferläsionen invasiver Karzinome aufgefasst werden, wurden die hyperplastischen Polypen, bei denen solche zytologischen Atypien fehlen, als nichtneoplastische Veränderungen ohne Malignitätspotenzial angesehen. Mittlerweile ist klar, dass die ehemals als „hyperplastische Polypen“ klassifizierten Läsionen eine heterogene Gruppe darstellen, die z. T. ein signifikantes Risiko zur malignen Transformation aufweisen. Molekular zeigen diese Polypen charakteristische Genpromotormethylierungen (so genannte „CIMP-Pathways“), die bei konventionellen kolorektalen Adenomen nicht üblich sind, und entwickeln sich wahrscheinlich über den neuen serratierten Karzinogeneseweg zum kolorektalen Karzinom. Das Spektrum dieser serratierten Polypen umfasst dabei nicht nur die hyperplastischen Polypen, sondern auch das sessile serratierte Adenom (SSA) und das traditionelle serratierte Adenom (TSA) sowie Mischformen. Auf einer Konsensuskonferenz der AG „Gastroenterologische Pathologie der DGP“ wurde versucht, eine Standardisierung der Nomenklatur und der histologischen Diagnosekriterien zu erarbeiten sowie Empfehlungen für das klinische Management zu formulieren.
Abstract
Until recently, two major types of colorectal epithelial polyps were distinguished: the adenoma and the hyperplastic polyp. While adenomas – because of their cytological atypia – were recognized as precursor lesions for colorectal carcinoma, hyperplastic polyps were perceived as harmless lesions without any potential for malignant progression, mainly because hyperplastic polyps lack cytological atypia. Meanwhile, it is evident that the lesions formerly classified as hyperplastic represent a heterogeneous group of polyps, some of which exhibit a significant risk of neoplastic progression. These lesions show characteristic epigenetic alterations not commonly seen in colorectal adenomas and progress to colorectal carcinoma via the so-called serrated pathway (CIMP pathway). This group of polyps is comprised not only of hyperplastic polyps, but also of sessile serrated adenomas (SSA), traditional serrated adenomas (TSA) and mixed polyps, showing serrated and “classical” adenomatous features. In a consensus conference of the working group of gastroenterological pathology of the German Society of Pathology, standardization of nomenclature and diagnostic criteria as well as recommendations for clinical management of these serrated polyps were formulated and are presented herein.
Notes
In einer zwischenzeitlich in Dresden durchgeführten multivariaten Analyse an 212 serratierten Läsionen erwies sich neben den Kriterien 1–3 auch der Nachweis reifer Becherzellen an der Kryptenbasis als signifikanter Diskriminator zwischen HP und SSA [35].
Literatur
Ajioka Y, Watanabe H, Jass JR et al (1998) Infrequent K-ras codon 12 mutation in serrated adenomas of human colorectum. Gut 42:680–684
Azimuddin K, Stasik JJ, Khubchandani IT et al (2000) Hyperplastic polyps: „more than meets the eye“? Report of sixteen cases. Dis Colon Rectum 43:1309–1313
Bartley AN, Thompson PA, Buckmeier JA et al (2010) Expression of gastric pyloric mucin, MUC6, in colorectal serrated polyps. Mod Pathol 23:169–176
Chan TL, Zhao W, Leung SY et al (2003) BRAF and KRAS mutations in colorectal hyperplastic polyps and serrated adenomas. Cancer Res 63:4878–4881
Dong SM, Lee EJ, Jeon ES et al (2005) Progressive methylation during the serrated neoplasia pathway of the colorectum. Mod Pathol 18:170–178
Freeman HJ (2008) Heterogeneity of colorectal adenomas, the serrated adenoma, and implications for screening and surveillance. World J Gastroenterol 14:3461–3463
Goldstein NS (2006) Small colonic microsatellite unstable adenocarcinomas and high-grade epithelial dysplasias in sessile serrated adenoma polypectomy specimens: a study of eight cases. Am J Clin Pathol 125:132–145
Hamilton SR, Aaltonen LA (Hrsg) (2000) World Health Organization Classification of Tumours. Pathology and genetics of tumours of the digestive system. IARC, Lyon
Iino H, Jass JR, Simms LA et al (1999) DNA microsatellite instability in hyperplastic polyps, serrated adenomas, and mixed polyps: a mild mutator pathway for colorectal cancer? J Clin Pathol 52:5–9
Jass JR, Biden KG, Cummings MC et al (1999) Characterisation of a subtype of colorectal cancer combining features of the suppressor and mild mutator pathways. J Clin Pathol 52:455–460
Jass JR, Whitehall VL, Young J et al (2002) Emerging concepts in colorectal neoplasia. Gastroenterology 123:862–876
Jass JR, Baker K, Zlobec I et al (2006) Advanced colorectal polyps with the molecular and morphological features of serrated polyps and adenomas: concept of a ‚fusion‘ pathway to colorectal cancer. Histopathology 49:121–131
Jass JR (2007) Classification of colorectal cancer based on correlation of clinical, morphological and molecular features. Histopathology 50:113–130
Jeevaratnam P, Cottier DS, Browett PJ et al (1996) Familial giant hyperplastic polyposis predisposing to colorectal cancer: a new hereditary bowel cancer syndrome. J Pathol 179:20–25
Kambara T, Simms LA, Whitehall VL et al (2004) BRAF mutation is associated with DNA methylation in serrated polyps and cancers of the colorectum. Gut 53:1137–1144
Kudo S, Lambert R, Allen JI et al (2008) Nonpolypoid neoplastic lesions of the colorectal mucosa. Gastrointest Endosc 68:S3–S47
Lazarus R, Junttila OE, Karttunen TJ et al (2005) The risk of metachronous neoplasia in patients with serrated adenoma. Am J Clin Pathol 123:349–359
Li D, Jin C, McCulloch C et al (2009) Association of large serrated polyps with synchronous advanced colorectal neoplasia. Am J Gastroenterol 104:695–702
Longacre TA, Fenoglio-Preiser CM (1990) Mixed hyperplastic adenomatous polyps/serrated adenomas. A distinct form of colorectal neoplasia. Am J Surg Pathol 14:524–537
Morson BC (1962) Precancerous lesions of the colon and rectum. Classification and controversial issues. JAMA 179:316–321
Noffsinger AE (2009) Serrated polyps and colorectal cancer: new pathway to malignancy. Annu Rev Pathol 4:343–364
Oono Y, Fu K, Nakamura H et al (2009) Progression of a sessile serrated adenoma to an early invasive cancer within 8 months. Dig Dis Sci 54:906–909
Otori K, Oda Y, Sugiyama K et al (1997) High frequency of K-ras mutations in human colorectal hyperplastic polyps. Gut 40:660–663
Owens SR, Chiosea SI, Kuan SF (2008) Selective expression of gastric mucin MUC6 in colonic sessile serrated adenoma but not in hyperplastic polyp aids in morphological diagnosis of serrated polyps. Mod Pathol 21:660–669
Preto A, Figueiredo J, Velho S et al (2008) BRAF provides proliferation and survival signals in MSI colorectal carcinoma cells displaying BRAF(V600E) but not KRAS mutations. J Pathol 214:320–327
Renaut AJ, Douglas PR, Newstead GL (2002) Hyperplastic polyposis of the colon and rectum. Colorectal Dis 4:213–215
Schmiegel W, Reinacher-Schick A, Arnold D et al (2008) Update S3-guideline „colorectal cancer“ 2008. Z Gastroenterol 46:799–840
Tateyama H, Li W, Takahashi E et al (2002) Apoptosis index and apoptosis-related antigen expression in serrated adenoma of the colorectum: the saw-toothed structure may be related to inhibition of apoptosis. Am J Surg Pathol 26:249–256
Torlakovic E, Snover DC (1996) Serrated adenomatous polyposis in humans. Gastroenterology 110:748–755
Torlakovic E, Skovlund E, Snover DC et al (2003) Morphologic reappraisal of serrated colorectal polyps. Am J Surg Pathol 27:65–81
Torlakovic EE, Gomez JD, Driman DK et al (2008) Sessile Serrated Adenoma (SSA) vs. Traditional Serrated Adenoma (TSA). Am J Surg Pathol 32:21–29
Toyota M, Ahuja N, Ohe-Toyota M et al (1999) CpG island methylator phenotype in colorectal cancer. Proc Natl Acad Sci U S A 96:8681–8686
Velho S, Moutinho C, Cirnes L et al (2008) BRAF, KRAS and PIK3CA mutations in colorectal serrated polyps and cancer: primary or secondary genetic events in colorectal carcinogenesis? BMC Cancer 8:255
Warner AS, Glick ME, Fogt F (1994) Multiple large hyperplastic polyps of the colon coincident with adenocarcinoma. Am J Gastroenterol 89:123–125
Wieczorek K, Stolte M, Baretton G et al (2009) Serrated lesions of the colorectum: morphologic characterisation of a large collective. Pathologe (Suppl 1):7
Yantiss RK, Oh KY, Chen YT et al (2007) Filiform serrated adenomas: a clinicopathologic and immunophenotypic study of 18 cases. Am J Surg Pathol 31:1238–1245
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Baretton, G., Autschbach, F., Baldus, S. et al. Histopathologische Diagnostik und Differenzialdiagnostik serratierter Polypen im Kolorektum. Pathologe 32, 76–82 (2011). https://doi.org/10.1007/s00292-010-1365-3
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DOI: https://doi.org/10.1007/s00292-010-1365-3
Schlüsselwörter
- Hyperplastischer Polyp
- Sessiles serratiertes Adenom
- Traditionelles serratiertes Adenom
- Serratierter Signal-/Karzinogeneseweg
- Präkanzerose
- Kolorektum