Difference between revisions of "Hashimoto's thyroiditis"

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'''Hashimoto's thyroiditis''', also '''Hashimoto's disease''', is an autoimmune disorder that causes hypothyroidism.
{{ Infobox diagnosis
| Name      = {{PAGENAME}}
| Image      = Hashimoto thyroiditis -- intermed mag.jpg
| Width      =
| Caption    = Lymphocytic thyroiditis with serologic evidence of Hashimoto's thyroiditis. [[H&E stain]].
| Synonyms  =
| Micro      = polymorphous lymphoplasmacytic infiltrate with germinal centres, +/-nuclear clearing common, +/-oncocytic metaplasia
| Subtypes  =
| LMDDx      = [[lymphocytic thyroiditis]] (no serologic evidence of Hashimoto), [[papillary thyroid carcinoma]], [[MALT lymphoma]], [[Diffuse large B cell lymphoma]], [[Hürthle cell neoplasm]]
| Stains    =
| IHC        = CD3, CD20, CD10, BCL6, BCL2, kappa, lambda - to demonstrated mixed population of lymphocytes
| EM        =
| Molecular  = B-Cell clonality testing negative
| IF        =
| Gross      =
| Grossing  =
| Staging    =
| Site      = [[thyroid gland]]
| Assdx      = increased risk of [[lymphoma]]
| Syndromes  =
| Clinicalhx =
| Signs      =
| Symptoms  =
| Prevalence = uncommon
| Bloodwork  = antimicrosomal (antithyroid peroxidase) positive
| Rads      =
| Endoscopy  =
| Prognosis  = benign
| Other      =
| ClinDDx    =
| Tx        =
}}
'''Hashimoto's thyroiditis''', also '''Hashimoto's disease''', is an inflammatory (autoimmune disorder) of the [[thyroid gland]] that causes hypothyroidism.


==General==
==General==
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**[[MALT lymphoma]].
**[[MALT lymphoma]].
**[[Diffuse large B cell lymphoma]] (DLBCL).
**[[Diffuse large B cell lymphoma]] (DLBCL).
===Hashimoto's thyroiditis and papillary thyroid carcinoma===
*Association between Hashimoto's and papillary thyroid carcinoma considered controversial - literature divided.<ref name=pmid25419066>{{Cite journal  | last1 = Anand | first1 = A. | last2 = Singh | first2 = KR. | last3 = Kushwaha | first3 = JK. | last4 = Hussain | first4 = N. | last5 = Sonkar | first5 = AA. | title = Papillary Thyroid Cancer and Hashimoto's Thyroiditis: An Association Less Understood. | journal = Indian J Surg Oncol | volume = 5 | issue = 3 | pages = 199-204 | month = Sep | year = 2014 | doi = 10.1007/s13193-014-0325-4 | PMID = 25419066 }}</ref>
**Jankovic ''et al.'' dispute that there is an association.<ref name=pmid23293329>{{Cite journal  | last1 = Jankovic | first1 = B. | last2 = Le | first2 = KT. | last3 = Hershman | first3 = JM. | title = Clinical Review: Hashimoto's thyroiditis and papillary thyroid carcinoma: is there a correlation? | journal = J Clin Endocrinol Metab | volume = 98 | issue = 2 | pages = 474-82 | month = Feb | year = 2013 | doi = 10.1210/jc.2012-2978 | PMID = 23293329 }}</ref>
**Zhang ''et al.'' show a correlation.<ref name=pmid24619663>{{Cite journal  | last1 = Zhang | first1 = Y. | last2 = Dai | first2 = J. | last3 = Wu | first3 = T. | last4 = Yang | first4 = N. | last5 = Yin | first5 = Z. | title = The study of the coexistence of Hashimoto's thyroiditis with papillary thyroid carcinoma. | journal = J Cancer Res Clin Oncol | volume = 140 | issue = 6 | pages = 1021-6 | month = Jun | year = 2014 | doi = 10.1007/s00432-014-1629-z | PMID = 24619663 }}</ref>


==Microscopic==
==Microscopic==
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*[[MALT lymphoma]].
*[[MALT lymphoma]].
*[[Diffuse large B cell lymphoma]].
*[[Diffuse large B cell lymphoma]].
*[[Hürthle cell neoplasm]].
===Images===
<gallery>
Image: Hashimoto thyroiditis -- very low mag.jpg | HT - very low mag. (WC)
Image: Hashimoto thyroiditis -- low mag.jpg | HT - low mag. (WC)
Image: Hashimoto thyroiditis -- intermed mag.jpg | HT - intermed. mag. (WC)
Image: Hashimoto thyroiditis -- high mag.jpg | HT - high mag. (WC)
Image: Hashimoto thyroiditis - alt -- very low mag.jpg | HT - very low mag. (WC)
Image: Hashimoto thyroiditis - alt -- intermed mag.jpg | HT - intermed. mag. (WC)
</gallery>


==IHC==
==IHC==
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==Molecular==
==Molecular==
*Occasionally done to exclude lymphoma - see ''[[MALT lymphoma]]'' and ''[[DLBCL]]''.
*Occasionally done to exclude lymphoma - see ''[[MALT lymphoma]]'' and ''[[DLBCL]]''.
==Sign out==
<pre>
Total Thyroid, Thyroidectomy:
- Lymphocytic thyroiditis compatible with clinical history of Hashimoto's thyroiditis.
- NEGATIVE for malignancy.
</pre>


==See also==
==See also==
*[[Thyroid gland]].
*[[Thyroid gland]].
*[[Graves' disease]].


==References==
==References==

Latest revision as of 21:29, 13 September 2016

Hashimoto's thyroiditis
Diagnosis in short

Lymphocytic thyroiditis with serologic evidence of Hashimoto's thyroiditis. H&E stain.

LM polymorphous lymphoplasmacytic infiltrate with germinal centres, +/-nuclear clearing common, +/-oncocytic metaplasia
LM DDx lymphocytic thyroiditis (no serologic evidence of Hashimoto), papillary thyroid carcinoma, MALT lymphoma, Diffuse large B cell lymphoma, Hürthle cell neoplasm
IHC CD3, CD20, CD10, BCL6, BCL2, kappa, lambda - to demonstrated mixed population of lymphocytes
Molecular B-Cell clonality testing negative
Site thyroid gland

Associated Dx increased risk of lymphoma
Prevalence uncommon
Blood work antimicrosomal (antithyroid peroxidase) positive
Prognosis benign

Hashimoto's thyroiditis, also Hashimoto's disease, is an inflammatory (autoimmune disorder) of the thyroid gland that causes hypothyroidism.

General

  • This is a clinical diagnosis.
    • The histomorphologic findings, generally, are not diagnostic.

Etiology:

  • Autoimmune disease leading to hypothyroidism.
    • Often genetic/part of a syndrome.

Clinical

Serology:[1]

  • Antimicrosomal (antithyroid peroxidase) +ve.
  • Antithyroglobulin +ve.
    • Normal: <4.0 IU/mL.[2]

Associated pathology:[1]

Hashimoto's thyroiditis and papillary thyroid carcinoma

  • Association between Hashimoto's and papillary thyroid carcinoma considered controversial - literature divided.[4]
    • Jankovic et al. dispute that there is an association.[5]
    • Zhang et al. show a correlation.[6]

Microscopic

Features:

  • Lymphocytic infiltrate - key feature.
  • Nuclear clearing common.
  • Polymorphous lymphoplasmacytic infiltrate with germinal centres.[7]
  • +/-Oncocytic metaplasia.

Notes:

  • Histologically often not possible to separate from "non-specific" thyroiditis.[8]

DDx:

Images

IHC

  • Panel to exclude lymphoma may be required, e.g. CD3, CD20, CD10, BCL6, BCL2, kappa, lambda.

Molecular

Sign out

Total Thyroid, Thyroidectomy: 
- Lymphocytic thyroiditis compatible with clinical history of Hashimoto's thyroiditis. 
- NEGATIVE for malignancy.

See also

References

  1. 1.0 1.1 Poropatich C, Marcus D, Oertel YC (1994). "Hashimoto's thyroiditis: fine-needle aspirations of 50 asymptomatic cases". Diagn. Cytopathol. 11 (2): 141–5. PMID 7813361. http://www3.interscience.wiley.com/journal/112701408/abstract?CRETRY=1&SRETRY=0.
  2. URL: http://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/84382. Accessed on: 15 October 2015.
  3. Ohye, H.; Fukata, S.; Hirokawa, M. (Nov 2007). "[Malignant lymphoma of the thyroid].". Nihon Rinsho 65 (11): 2092-8. PMID 18018576.
  4. Anand, A.; Singh, KR.; Kushwaha, JK.; Hussain, N.; Sonkar, AA. (Sep 2014). "Papillary Thyroid Cancer and Hashimoto's Thyroiditis: An Association Less Understood.". Indian J Surg Oncol 5 (3): 199-204. doi:10.1007/s13193-014-0325-4. PMID 25419066.
  5. Jankovic, B.; Le, KT.; Hershman, JM. (Feb 2013). "Clinical Review: Hashimoto's thyroiditis and papillary thyroid carcinoma: is there a correlation?". J Clin Endocrinol Metab 98 (2): 474-82. doi:10.1210/jc.2012-2978. PMID 23293329.
  6. Zhang, Y.; Dai, J.; Wu, T.; Yang, N.; Yin, Z. (Jun 2014). "The study of the coexistence of Hashimoto's thyroiditis with papillary thyroid carcinoma.". J Cancer Res Clin Oncol 140 (6): 1021-6. doi:10.1007/s00432-014-1629-z. PMID 24619663.
  7. Lefkowitch, Jay H. (2006). Anatomic Pathology Board Review (1st ed.). Saunders. pp. 672. ISBN 978-1416025887.
  8. Mills, Stacey E; Carter, Darryl; Greenson, Joel K; Oberman, Harold A; Reuter, Victor E (2004). Sternberg's Diagnostic Surgical Pathology (4th ed.). Lippincott Williams & Wilkins. pp. 560. ISBN 978-0781740517.