Abstract |
The diagnostic problems in the subtyping of renal tumors were evaluated by a panel of five pathologists studying a set of selected tumors. Five pathologists independently assessed a single hematoxylin-and- eosin (HE)-stained slide from 28 selected renal tumors. After this independent assessment, the pathologists reevaluated and discussed all discordant cases. Additional HE-stained sections and immunohistochemically (IHC) stained slides were available. The generalized kappa for interobserver agreement was calculated. After independent assessment of the HE-stained slides, the five pathologists unanimously reached an agreement in the decision between malignant and benign in 82% of the cases. Fifty percent of the cases were correctly subclassified. The overall generalized kappa value for the five pathologists was 0.320 (CI 95% 0.090-0.551), which is considered a moderate agreement. A 100% agreement was reached for all 28 cases after examination of more slides from different tumor areas and IHC-stained sections. An accurate histologic distinction between benign and malignant renal tumors is possible on one HE-stained section. Correct assignment of the subtype is difficult on one slide alone and relies on IHC-markers and additional slides. Tumors composed of an eosinophilic cell type and tumors with a papillary growth pattern were the major causes of an incorrect diagnosis on an HE-stained section alone.
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Authors | Intan Kümmerlin, Fiebo ten Kate, Frank Smedts, Thomas Horn, Ferran Algaba, Isabel Trias, Jean de la Rosette, M Pilar Laguna |
Journal | Pathology, research and practice
(Pathol Res Pract)
Vol. 205
Issue 1
Pg. 27-34
( 2009)
ISSN: 0344-0338 [Print] Germany |
PMID | 18930357
(Publication Type: Journal Article)
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Chemical References |
- Coloring Agents
- Eosine Yellowish-(YS)
- Hematoxylin
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Topics |
- Aged
- Biopsy
- Carcinoma, Renal Cell
(classification, pathology)
- Coloring Agents
- Diagnostic Errors
(prevention & control)
- Eosine Yellowish-(YS)
- Female
- Hematoxylin
- Humans
- Immunohistochemistry
- Kidney Neoplasms
(classification, pathology)
- Male
- Middle Aged
- Observer Variation
- Predictive Value of Tests
- Staining and Labeling
(methods)
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