Abstract | BACKGROUND: METHODS: RESULTS:
Paraffin-embedded thyroid specimens were available for 139 eligible patients. Significant (P < .001) associations were found between increasing desmoplasia and decreasing tumor capsule integrity and nodal disease (from 0 to 79% and 0 to 62%); the number of node metastases (medians, from 0 to 3 and 0 to 2 nodes); and biochemical cure (from 100 to 36% and 100 to 58%). Desmoplasia (low-moderate to high, with fibrosis >10%) and breach of the tumor capsule (>3 extensions; 1 extension >3 mm in width; or diffuse growth without tumor capsule) yielded excellent sensitivity and negative predictive value (100%), with moderate specificity (57 and 48%) and positive predictive value (50 and 46%). In retrospect, node dissection proved unnecessary in 55 (57%) and 47 (48%) patients who harbored desmoplasia-negative and encapsulated tumors. When available frozen sections were histopathologically compared with matching paraffin-embedded thyroid tumor specimens, concordance was 98% (53 of 54 pairs): 1 of 7 upgrades changed the diagnosis to desmoplasia, whereas 1 of 3 downgrades shifted the diagnosis of tumor capsule breach from "present" to "absent." CONCLUSIONS: Patients with desmoplasia-negative encapsulated sporadic medullary thyroid cancer may forgo node dissection at specialist centers.
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Authors | Andreas Machens, Peter Kaatzsch, Kerstin Lorenz, Lars-Christian Horn, Claudia Wickenhauser, Kurt Werner Schmid, Henning Dralle, Udo Siebolts |
Journal | Surgery
(Surgery)
Vol. 171
Issue 2
Pg. 360-367
(02 2022)
ISSN: 1532-7361 [Electronic] United States |
PMID | 34602296
(Publication Type: Journal Article)
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Copyright | Copyright © 2021 Elsevier Inc. All rights reserved. |
Chemical References |
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Topics |
- Adult
- Aged
- Aged, 80 and over
- Carcinoma, Neuroendocrine
(pathology, surgery)
- Collagen
(analysis)
- Female
- Fibrosis
- Frozen Sections
- Humans
- Lymph Node Excision
- Lymph Nodes
(pathology, surgery)
- Male
- Middle Aged
- Paraffin Embedding
- Thyroid Gland
(pathology)
- Thyroid Neoplasms
(pathology, surgery)
- Young Adult
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