Difference between revisions of "Sinonasal undifferentiated carcinoma"
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| Micro = tumour with variable architecture (nested, trabecular or lobular), small-to-moderate cytoplasm, +/-distinct nucleoli, cell size variable (small to large); glandular and squamous differentiation are absent by definition | | Micro = tumour with variable architecture (nested, trabecular or lobular), small-to-moderate cytoplasm, +/-distinct nucleoli, cell size variable (small to large); glandular and squamous differentiation are absent by definition | ||
| Subtypes = | | Subtypes = | ||
| LMDDx = poorly differentiated [[squamous cell carcinoma of the head and neck]], [[small cell carcinoma]], [[SMARCB1-deficient sinonasal carcinoma]], others | | LMDDx = poorly differentiated [[squamous cell carcinoma of the head and neck]], [[small cell carcinoma]], [[SMARCB1-deficient sinonasal carcinoma]], [[SMARCA4-deficient sinonasal carcinoma]], [[nasopharyngeal carcinoma]], others | ||
| Stains = | | Stains = | ||
| IHC = pankeratin +ve, [[EMA]] +ve, [[CK7]] +ve, [[CK5/6]] -ve, NSE +ve/-ve, chromogranin A -ve, synaptophysin -ve, [[p63]] +ve/-ve | | IHC = pankeratin +ve, [[EMA]] +ve, [[CK7]] +ve, [[CK5/6]] -ve, NSE +ve/-ve, chromogranin A -ve, synaptophysin -ve, [[p63]] +ve/-ve | ||
| EM = | | EM = | ||
| Molecular = | | Molecular = [[EBER]] -ve | ||
| IF = | | IF = | ||
| Gross = | | Gross = | ||
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*[[Small cell carcinoma]]. | *[[Small cell carcinoma]]. | ||
*[[SMARCB1-deficient sinonasal carcinoma]].<ref name=pmid25007146>{{Cite journal | last1 = Bishop | first1 = JA. | last2 = Antonescu | first2 = CR. | last3 = Westra | first3 = WH. | title = SMARCB1 (INI-1)-deficient carcinomas of the sinonasal tract. | journal = Am J Surg Pathol | volume = 38 | issue = 9 | pages = 1282-9 | month = Sep | year = 2014 | doi = 10.1097/PAS.0000000000000285 | PMID = 25007146 }}</ref> | *[[SMARCB1-deficient sinonasal carcinoma]].<ref name=pmid25007146>{{Cite journal | last1 = Bishop | first1 = JA. | last2 = Antonescu | first2 = CR. | last3 = Westra | first3 = WH. | title = SMARCB1 (INI-1)-deficient carcinomas of the sinonasal tract. | journal = Am J Surg Pathol | volume = 38 | issue = 9 | pages = 1282-9 | month = Sep | year = 2014 | doi = 10.1097/PAS.0000000000000285 | PMID = 25007146 }}</ref> | ||
*[[SMARCA4-deficient sinonasal carcinoma]].<ref name=pmid34871352>{{cite journal |authors=Kakkar A, Ashraf SF, Rathor A, Adhya AK, Mani S, Sikka K, Jain D |title=SMARCA4/BRG1-Deficient Sinonasal Carcinoma |journal=Arch Pathol Lab Med |volume=146 |issue=9 |pages=1122–1130 |date=September 2022 |pmid=34871352 |doi=10.5858/arpa.2021-0001-OA |url=}}</ref> | |||
*[[Nasopharyngeal carcinoma]]. | |||
*Other tumours, especially [[small round blue cell tumours]] and [[lymphoma]]. | *Other tumours, especially [[small round blue cell tumours]] and [[lymphoma]]. | ||
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===Comparison between different sinonasal carcinomas=== | ===Comparison between different sinonasal carcinomas=== | ||
Based on a modest size study, keratins can useful for subclassifying sinonasal carcinomas:<ref name=pmid12459626>{{cite journal | | Based on a modest size study, keratins can useful for subclassifying sinonasal carcinomas:<ref name=pmid12459626>{{cite journal |authors=Franchi A, Moroni M, Massi D, Paglierani M, Santucci M |title=Sinonasal undifferentiated carcinoma, nasopharyngeal-type undifferentiated carcinoma, and keratinizing and nonkeratinizing squamous cell carcinoma express different cytokeratin patterns |journal=Am J Surg Pathol |volume=26 |issue=12 |pages=1597–604 |date=December 2002 |pmid=12459626 |doi=10.1097/00000478-200212000-00007 |url=}}</ref> | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
! Diagnosis | ! Diagnosis | ||
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|- | |- | ||
|} | |} | ||
==Molecular== | |||
*EBER -ve.<ref name=pmid11176064>{{cite journal |authors=Cerilli LA, Holst VA, Brandwein MS, Stoler MH, Mills SE |title=Sinonasal undifferentiated carcinoma: immunohistochemical profile and lack of EBV association |journal=Am J Surg Pathol |volume=25 |issue=2 |pages=156–63 |date=February 2001 |pmid=11176064 |doi=10.1097/00000478-200102000-00003 |url=}}</ref> | |||
==See also== | ==See also== | ||
Latest revision as of 18:07, 20 December 2023
| Sinonasal undifferentiated carcinoma | |
|---|---|
| Diagnosis in short | |
 SNUC. H&E stain. | |
|
| |
| LM | tumour with variable architecture (nested, trabecular or lobular), small-to-moderate cytoplasm, +/-distinct nucleoli, cell size variable (small to large); glandular and squamous differentiation are absent by definition |
| LM DDx | poorly differentiated squamous cell carcinoma of the head and neck, small cell carcinoma, SMARCB1-deficient sinonasal carcinoma, SMARCA4-deficient sinonasal carcinoma, nasopharyngeal carcinoma, others |
| IHC | pankeratin +ve, EMA +ve, CK7 +ve, CK5/6 -ve, NSE +ve/-ve, chromogranin A -ve, synaptophysin -ve, p63 +ve/-ve |
| Molecular | EBER -ve |
| Site | head and neck |
|
| |
| Prevalence | rare |
| Prognosis | poor |
| Clin. DDx | other head and neck tumours |
Sinonasal undifferentiated carcinoma, abbreviated SNUC, is a rare epithelial malignancy of the head and neck.
General
- Aggressive/poor prognosis.
Microscopic
Features:[3]
- Architecture: nested, trabecular or lobular.
- Distinct cellular borders.
- Small-to-moderate cytoplasm.
- +/-Distinct nucleoli.
- Tumour cell size variable (small to large).
Note:
- Glandular and squamous differentiation are absent by definition.[4]
DDx:
- Poorly differentiated squamous cell carcinoma of the head and neck.
- Small cell carcinoma.
- SMARCB1-deficient sinonasal carcinoma.[5]
- SMARCA4-deficient sinonasal carcinoma.[6]
- Nasopharyngeal carcinoma.
- Other tumours, especially small round blue cell tumours and lymphoma.
Images
www:
SNUC - low mag. (WC)
SNUC - high mag. (WC)
SNUC - very high mag. (WC)
IHC
Features:[3]
Others:
- NSE +ve/-ve.
- Chromogranin A -ve.
- Synaptophysin -ve.
- p63 +ve/-ve.[7]
- SMARCB1 (INI1) +ve (nuclear staining present).
- Nuclear staining lost in SMARCB1-deficient sinonasal carcinoma.
Comparison between different sinonasal carcinomas
Based on a modest size study, keratins can useful for subclassifying sinonasal carcinomas:[8]
| Diagnosis | CK4 | CK5/6 | CK7 | CK13 | CK14 | CK19 |
|---|---|---|---|---|---|---|
| Sinonasal undifferentiated carcinoma (SNUC) | +0% | +0% | +50% | +0% | +0% | +50% |
| Nasopharyngeal-type undifferentiated carcinoma (NPTC) | +0% | +80% | +0% | +80% | +0% | +100% |
| Nonkeratinizing squamous cell carcinoma (NKSCC) | +0% | +90% | +0% | +80% | +80% | +90% |
| Squamous cell carcinoma (keratainizing) | +30% | +90% | +60% | +90% | +80% | +90% |
Molecular
- EBER -ve.[9]
See also
References
- ↑ Pitman, KT.; Costantino, PD.; Lassen, LF. (1995). "Sinonasal undifferentiated carcinoma: current trends in treatment.". Skull Base Surg 5 (4): 269-72. PMC 1656535. PMID 17170968. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1656535/.
- ↑ Al-Mamgani, A.; van Rooij, P.; Mehilal, R.; Tans, L.; Levendag, PC. (Apr 2012). "Combined-modality treatment improved outcome in sinonasal undifferentiated carcinoma: single-institutional experience of 21 patients and review of the literature.". Eur Arch Otorhinolaryngol. doi:10.1007/s00405-012-2008-5. PMID 22476411.
- ↑ 3.0 3.1 Humphrey, Peter A; Dehner, Louis P; Pfeifer, John D (2008). The Washington Manual of Surgical Pathology (1st ed.). Lippincott Williams & Wilkins. pp. 38. ISBN 978-0781765275.
- ↑ 4.0 4.1 Mills, SE. (Mar 2002). "Neuroectodermal neoplasms of the head and neck with emphasis on neuroendocrine carcinomas.". Mod Pathol 15 (3): 264-78. doi:10.1038/modpathol.3880522. PMID 11904342.
- ↑ Bishop, JA.; Antonescu, CR.; Westra, WH. (Sep 2014). "SMARCB1 (INI-1)-deficient carcinomas of the sinonasal tract.". Am J Surg Pathol 38 (9): 1282-9. doi:10.1097/PAS.0000000000000285. PMID 25007146.
- ↑ Kakkar A, Ashraf SF, Rathor A, Adhya AK, Mani S, Sikka K, Jain D (September 2022). "SMARCA4/BRG1-Deficient Sinonasal Carcinoma". Arch Pathol Lab Med 146 (9): 1122–1130. doi:10.5858/arpa.2021-0001-OA. PMID 34871352.
- ↑ Wadsworth, B.; Bumpous, JM.; Martin, AW.; Nowacki, MR.; Jenson, AB.; Farghaly, H. (Dec 2011). "Expression of p16 in sinonasal undifferentiated carcinoma (SNUC) without associated human papillomavirus (HPV).". Head Neck Pathol 5 (4): 349-54. doi:10.1007/s12105-011-0285-8. PMC 3210220. PMID 21805120. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3210220/.
- ↑ Franchi A, Moroni M, Massi D, Paglierani M, Santucci M (December 2002). "Sinonasal undifferentiated carcinoma, nasopharyngeal-type undifferentiated carcinoma, and keratinizing and nonkeratinizing squamous cell carcinoma express different cytokeratin patterns". Am J Surg Pathol 26 (12): 1597–604. doi:10.1097/00000478-200212000-00007. PMID 12459626.
- ↑ Cerilli LA, Holst VA, Brandwein MS, Stoler MH, Mills SE (February 2001). "Sinonasal undifferentiated carcinoma: immunohistochemical profile and lack of EBV association". Am J Surg Pathol 25 (2): 156–63. doi:10.1097/00000478-200102000-00003. PMID 11176064.