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| =Head and neck pathology= | | =Head and neck pathology= |
| ==Tonsillitis== | | ==Tonsillitis== |
| ===General===
| | {{Main|Tonsillitis}} |
| *Commonly removed (tonsillectomy) when enlarged.
| | {{Main|Tonsil}} |
| *Very low probability of malignancy (<0.2%) in tonsilectomies in individuals <19 years old if no clinical suspicion.<ref name=pmid15963574>{{Cite journal | last1 = Erdag | first1 = TK. | last2 = Ecevit | first2 = MC. | last3 = Guneri | first3 = EA. | last4 = Dogan | first4 = E. | last5 = Ikiz | first5 = AO. | last6 = Sutay | first6 = S. | title = Pathologic evaluation of routine tonsillectomy and adenoidectomy specimens in the pediatric population: is it really necessary? | journal = Int J Pediatr Otorhinolaryngol | volume = 69 | issue = 10 | pages = 1321-5 | month = Oct | year = 2005 | doi = 10.1016/j.ijporl.2005.05.005 | PMID = 15963574 }}</ref>
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| ===Gross===
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| *Symmetrical and equal size.
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| Note:
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| *Gross exam is considered sufficient if there is no asymmetry.<ref name=pmid14608541>{{Cite journal | last1 = Williams | first1 = MD. | last2 = Brown | first2 = HM. | title = The adequacy of gross pathological examination of routine tonsils and adenoids in patients 21 years old and younger. | journal = Hum Pathol | volume = 34 | issue = 10 | pages = 1053-7 | month = Oct | year = 2003 | doi = | PMID = 14608541 }}</ref>
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| ===Microscopic===
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| Features:
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| *Follicular hyperplasia - see ''[[lymph node pathology]]''.
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| *+/-Colonies (clusters) of [[actinomycetes]] in the tonsillar crypts.
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| DDx:
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| *Non-Hodgkin [[lymphoma]].<ref name=pmid20426908>{{Cite journal | last1 = Wang | first1 = XY. | last2 = Wu | first2 = N. | last3 = Zhu | first3 = Z. | last4 = Zhao | first4 = YF. | title = Computed tomography features of enlarged tonsils as a first symptom of non-Hodgkin's lymphoma. | journal = Chin J Cancer | volume = 29 | issue = 5 | pages = 556-60 | month = May | year = 2010 | doi = | PMID = 20426908 }}</ref>
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| *Others - see ''[[tonsil]]''.
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| ===IHC===
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| If there is a clinical suspicion - a panel to exclude (small cell) non-Hodgkin lymphomas:
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| *CD3.
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| *CD20.
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| *CD5.
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| *CD10.
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| *CD23.
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| *Cyclin D1.
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| ===Sign out===
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| <pre>
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| A. TONSIL, LEFT, TONSILLECTOMY:
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| - REACTIVE FOLLICULAR HYPERPLASIA.
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| - REACTIVE SQUAMOUS MUCOSA.
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| B. TONSIL, RIGHT, TONSILLECTOMY:
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| - REACTIVE FOLLICULAR HYPERPLASIA.
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| - REACTIVE SQUAMOUS MUCOSA.
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| </pre>
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| ====Without squamous mucosa====
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| <pre>
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| A. TONSIL, LEFT, TONSILLECTOMY:
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| - REACTIVE FOLLICULAR HYPERPLASIA.
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| B. TONSIL, RIGHT, TONSILLECTOMY:
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| - REACTIVE FOLLICULAR HYPERPLASIA.
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| </pre>
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| ==Obstructive sleep apnea== | | ==Obstructive sleep apnea== |