Thyroid adenoma biopsy: Difference between revisions
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* Areas of hemorrhage, fibrosis, calcification, and cystic change, similar to what is found in multinodular goiters, are common in thyroid (follicular) adenoma, particularly in larger lesions. | * Areas of hemorrhage, fibrosis, calcification, and cystic change, similar to what is found in multinodular goiters, are common in thyroid (follicular) adenoma, particularly in larger lesions. | ||
* Encapsulated tumors without evidence of infiltration | * Encapsulated tumors without evidence of infiltration | ||
==Biopsy Exams of Thyroid adenoma== | * Colloid nodules are distinguished by an apparently gelatinous mass of [[colloid]] both surrounding and contained within [[follicular cell]]s. Colloid nodules are not surrounded by a fibrous capsule of compressed tissue. However, they are surrounded by flattened [[epithelium|epithelial]] cells.<ref>{{cite web |url=http://rcpa.tv/parts/educational/anatomical/Dr_Alpha_Tsui/Thyroid_cytology.pdf |title=Thyroid cytology |author=Dr. Alpha Tsui |date=10 October 2010 |publisher=thyroidmanager.org |accessdate=26 September 2011}}</ref> Both the number of cells and the type of colloid may vary considerably.<ref>{{cite web |url=http://www.thyroidmanager.org/chapter%206d/fnabiopsy-frame.htm |title=Fine-Needle Aspiration Biopsy of the Thyroid Gland, Chapter 6d. |author=Diana S. Dean, M.D. Hossein Gharib, M.D. |date=10 October 2010 |publisher=thyroidmanager.org |accessdate=26 September 2011}}</ref> | ||
===Biopsy Exams of Thyroid adenoma=== | |||
<gallery> | <gallery> | ||
Image:Follicular adenoma.png|Follicular adenoma of the thyroid gland | Image:Follicular adenoma.png|Follicular adenoma of the thyroid gland |
Revision as of 06:40, 12 October 2015
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [3]; Associate Editor(s)-in-Chief: Ammu Susheela, M.D. [4]
Overview
Biopsy
- One approach used to determine type of adenoma is fine needle biopsy (FNB), which some have described as the most cost-effective, sensitive and accurate test.[1][2]
- FNB or ultrasound-guided FNA usually yields sufficient thyroid cells to assess the pathology, although in some cases, the suspected nodule may need to be removed surgically for pathological examination. The report may be done according to the Bethesda System for Reporting Thyroid Cytopathology.
Key Biopsy Findings in Thyroid adenoma
- Areas of hemorrhage, fibrosis, calcification, and cystic change, similar to what is found in multinodular goiters, are common in thyroid (follicular) adenoma, particularly in larger lesions.
- Encapsulated tumors without evidence of infiltration
- Colloid nodules are distinguished by an apparently gelatinous mass of colloid both surrounding and contained within follicular cells. Colloid nodules are not surrounded by a fibrous capsule of compressed tissue. However, they are surrounded by flattened epithelial cells.[3] Both the number of cells and the type of colloid may vary considerably.[4]
Biopsy Exams of Thyroid adenoma
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Follicular adenoma of the thyroid gland
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Histology of the encapsulated tumor. (a) Photomicrograph showing an encapsulated tumor composed of cells arranged in microfollicular, glandular and trabecular patterns (hematoxylin and eosin; 100×). (b) High power photomicrograph showing the microfollicles containing inspissated colloid resembling hyaline globules and separated by eosinophilic extracellular hyaline material. (hematoxylin and eosin; 100×).[5]
References
- ↑ Hamberger, B (1982). "Fine-needle aspiration biopsy of thyroid nodules. Impact on thyroid practice and cost of care". Am J Med. 73 (3): 381–384. doi:10.1016/0002-9343(82)90731-8. PMID 7124765.
- ↑ Mazzaferri (1993). "Management of a Solitary Thyroid Nodule". N Engl J Med. 328 (8): 553–9. doi:10.1056/NEJM199302253280807. PMID 8426623.
- ↑ Dr. Alpha Tsui (10 October 2010). "Thyroid cytology" (PDF). thyroidmanager.org. Retrieved 26 September 2011.
- ↑ Diana S. Dean, M.D. Hossein Gharib, M.D. (10 October 2010). "Fine-Needle Aspiration Biopsy of the Thyroid Gland, Chapter 6d". thyroidmanager.org. Retrieved 26 September 2011.
- ↑ Image courtesy of Dr Frank Gaillard. [1] (original file[2]).Creative Commons BY-SA-NC