Difference between revisions of "Biphenotypic sinonasal sarcoma"
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==IHC== | ==IHC== | ||
* | Features: | ||
* | *S-100 +ve - strong (28 +ve of 28 cases<ref name=pmid22301502/>). | ||
*Actin +ve (27 +ve of 28 cases<ref name=pmid22301502/>). | |||
==Molecular== | ==Molecular== | ||
Revision as of 16:22, 13 March 2016
Biphenotypic sinonasal sarcoma, abbreviated SNS,[1] is a rare bland appearing malignant tumour of the head and neck.
It is also known as low grade sinonasal sarcoma with neural and myogenic features.[2]
General
- Rare - largest series published (as of 2012) 28 patients.[3]
- Female predominant - (female:male = 3:1).[3]
Prognosis:
- No (far away) metastasis of death in a series of 28 patients.[3]
Gross
- Usually ethmoid sinus and/or nasal cavity.[3]
Microscopic
Features:
- Bland hypercellular stroma typically without many mitoses.
- Invaginating glandular epithelium.
DDx:
IHC
Features:
Molecular
- PAX3-MAML3 fusion - t(2;4)(q35;q31.1).[1]
See also
References
- ↑ 1.0 1.1 Wang, X.; Bledsoe, KL.; Graham, RP.; Asmann, YW.; Viswanatha, DS.; Lewis, JE.; Lewis, JT.; Chou, MM. et al. (Jul 2014). "Recurrent PAX3-MAML3 fusion in biphenotypic sinonasal sarcoma.". Nat Genet 46 (7): 666-8. doi:10.1038/ng.2989. PMID 24859338.
- ↑ Powers, KA.; Han, LM.; Chiu, AG.; Aly, FZ. (May 2015). "Low-grade sinonasal sarcoma with neural and myogenic features--diagnostic challenge and pathogenic insight.". Oral Surg Oral Med Oral Pathol Oral Radiol 119 (5): e265-9. doi:10.1016/j.oooo.2014.10.007. PMID 25488011.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Lewis, JT.; Oliveira, AM.; Nascimento, AG.; Schembri-Wismayer, D.; Moore, EA.; Olsen, KD.; Garcia, JG.; Lonzo, ML. et al. (Apr 2012). "Low-grade sinonasal sarcoma with neural and myogenic features: a clinicopathologic analysis of 28 cases.". Am J Surg Pathol 36 (4): 517-25. doi:10.1097/PAS.0b013e3182426886. PMID 22301502.