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Won-Tak Choi 1 Article
Non-conventional dysplastic subtypes in inflammatory bowel disease: a review of their diagnostic characteristics and potential clinical implications
Won-Tak Choi
J Pathol Transl Med. 2021;55(2):83-93.   Published online March 9, 2021
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  • 4 Citations
AbstractAbstract PDF
The early detection and grading of dysplasia is the current standard of care to minimize mortality from colorectal cancer (CRC) in patients with inflammatory bowel disease. With the development of advanced endoscopic resection techniques, colectomy is now reserved for patients with invisible/flat dysplasia (either high-grade [HGD] or multifocal low-grade dysplasia) or endoscopically unresectable lesions. Although most pathologists are familiar with the morphologic criteria of conventional (intestinal type) dysplasia, the most well-recognized form of dysplasia, an increasing number of diagnostic material has led to the recognition of several different morphologic patterns of epithelial dysplasia. The term “non-conventional” dysplasia has been coined to describe these changes, but to date, the recognition and full appreciation of these novel forms of dysplasia by practicing pathologists is uneven. The recognition of these non-conventional subtypes is becoming increasingly important, as some of them appear to have a higher risk of developing HGD or CRC than conventional dysplasia or sporadic adenomas. This review describes the morphologic characteristics of all seven non-conventional subtypes that have been reported to date as well as our current understanding of their clinicopathologic and molecular features that distinguish them from conventional dysplasia or sporadic adenomas.


Citations to this article as recorded by  
  • And the story goes on: non-conventional dysplasia of the colorectum
    Lavisha S. Punjabi, Yi Neng Lai, Anjula Thomas
    Journal of Pathology and Translational Medicine.2022; 56(2): 109.     CrossRef
  • Clinicopathologic features of undetected dysplasia found in total colectomy or proctocolectomy specimens of patients with inflammatory bowel disease
    Dorukhan Bahceci, Gregory Y Lauwers, Won‐Tak Choi
    Histopathology.2022; 81(2): 183.     CrossRef
  • Increased Risk of Non-conventional and Invisible Dysplasias in Patients with Primary Sclerosing Cholangitis and Inflammatory Bowel Disease
    Ruth Zhang, Gregory Y Lauwers, Won-Tak Choi
    Journal of Crohn's and Colitis.2022; 16(12): 1825.     CrossRef
  • Increased histologic inflammation is an independent risk factor for nonconventional dysplasia in ulcerative colitis
    Eric D. Nguyen, Dongliang Wang, Gregory Y. Lauwers, Won‐Tak Choi
    Histopathology.2022; 81(5): 644.     CrossRef

JPTM : Journal of Pathology and Translational Medicine