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J Clin Pathol 2003;56:91-95 doi:10.1136/jcp.56.2.91
  • Review

Classification and grading of the non-invasive urothelial neoplasms: recent advances and controversies

  1. R Montironi1,
  2. A Lopez-Beltran2,
  3. R Mazzucchelli1,
  4. D G Bostwick3
  1. 1Institute of Pathological Anatomy and Histopathology, Ancona University School of Medicine, I-60020 Torrette, Ancona, Italy
  2. 2Department of Pathology, Reina Sofia University Hospital and Faculty of Medicine, 14071 Cordoba, Spain
  3. 3Bostwick Laboratories, Richmond, and University of Virginia, Charlottesville, VA 23294 Virginia, USA
  1. Correspondence to:
 Professor R Montironi, Institute of Pathological Anatomy and Histopathology, University of Ancona School of Medicine, Umberto 1° Hospital, I-60020 Torrette, Ancona, Italy;
 r.montironi{at}unian.it
  • Accepted 30 September 2002

Abstract

The classification and grading of the non-invasive, intraepithelial neoplasms of the urothelium are based on the morphological pattern of growth—that is, papillary or flat (and endophytic)—and on their degree of architectural and cytological abnormalities. Recent advances in the morphological, molecular, and quantitative evaluation of these lesions have contributed to the refinement of the current classification and grading schemes. However, some controversies on the precise criteria and terminology, especially when the papillary lesions are concerned, are still present.

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