Difference between revisions of "Atypical teratoid/rhabdoid tumour"
Jump to navigation
Jump to search
(→IHC) |
(+infobox) |
||
| Line 1: | Line 1: | ||
{{ Infobox diagnosis | |||
| Name = {{PAGENAME}} | |||
| Image = | |||
| Width = | |||
| Caption = | |||
| Synonyms = | |||
| Micro = | |||
| Subtypes = | |||
| LMDDx = [[primitive neuroectodermal tumour]] (PNET), [[medulloblastoma]], [[diffuse astrocytoma]], [[choroid plexus carcinoma]],[[embryonal carcinoma]] | |||
| Stains = | |||
| IHC = INI1 -ve, S-100 +ve, EMA +ve, SMA +ve | |||
| EM = | |||
| Molecular = | |||
| IF = | |||
| Gross = | |||
| Grossing = | |||
| Site = [[CNS tumours|CNS]] - typically supratentorial | |||
| Assdx = | |||
| Syndromes = | |||
| Clinicalhx = usu. <3 years olds, occasionally adults | |||
| Signs = | |||
| Symptoms = | |||
| Prevalence = uncommon - esp. in adults | |||
| Bloodwork = | |||
| Rads = | |||
| Endoscopy = | |||
| Prognosis = very poor | |||
| Other = | |||
| ClinDDx = | |||
| Tx = | |||
}} | |||
'''Atypical teratoid/rhabdoid tumour''', abbreviated '''AT/RT''', is malignant tumour usually found supratentorially. | '''Atypical teratoid/rhabdoid tumour''', abbreviated '''AT/RT''', is malignant tumour usually found supratentorially. | ||
Revision as of 03:30, 17 February 2014
| Atypical teratoid/rhabdoid tumour | |
|---|---|
| Diagnosis in short | |
| LM DDx | primitive neuroectodermal tumour (PNET), medulloblastoma, diffuse astrocytoma, choroid plexus carcinoma,embryonal carcinoma |
| IHC | INI1 -ve, S-100 +ve, EMA +ve, SMA +ve |
| Site | CNS - typically supratentorial |
|
| |
| Clinical history | usu. <3 years olds, occasionally adults |
| Prevalence | uncommon - esp. in adults |
| Prognosis | very poor |
Atypical teratoid/rhabdoid tumour, abbreviated AT/RT, is malignant tumour usually found supratentorially.
It may be written atypical teratoid rhabdoid tumour, i.e. without the forward slash (abbreviated ATRT, or atypical teratoid-rhabdoid tumour (abbreviated AT-RT).
It should not be confused with the extrarenal malignant rhabdoid tumour.
General
- Usually supratentorial, occasionally in posterior fossa, case reports of spinal cord.
- Individuals usually <3 years old, uncommon in adults.[1]
- Prognosis very poor.[1]
Microscopic
Features:
- Cellular.
- Small round cells usu. with a prominent nucleolus.
- Rhabdoid cells.
- Cells with eosinophilic granular cytoplasm + eccentric nucleus.
- Mitoses.
- +/-Necrosis (common).
DDx:
- Primitive neuroectodermal tumour (PNET).
- Medulloblastoma.
- Diffuse astrocytoma.
- Choroid plexus carcinoma.
- Embryonal carcinoma.
Images
Rhabdoid tumour cell. (WC)
AT/RT. (WC)
AT/RT -ve for INI1. (WC)
www:
IHC
- BAF-47 -ve (AKA INI1, AKA SMARCB1 - the HGNC symbol[2]) - virtually diagnostic (4/4 cases[3]).
- Endothelial cells +ve control.
- S-100 +ve (4/4 cases[3].
- Few other brain tumours express it.
- Vimentin +ve - perinuclear condensation (4/4 cases[3]).
Others:
- GFAP +ve (focal - in tumour cells).
- EMA +ve - patchy cytoplasmic (4/4 cases[3]).
- Smooth muscle actin +ve.(4/4 cases[3]).
- Cytokeratin +ve.[citation needed]
See also
References
- ↑ 1.0 1.1 Kanoto, M.; Toyoguchi, Y.; Hosoya, T.; Kuchiki, M.; Sugai, Y. (Jan 2014). "Radiological Image Features of the Atypical Teratoid/Rhabdoid Tumor in Adults: A Systematic Review.". Clin Neuroradiol. doi:10.1007/s00062-013-0282-2. PMID 24477665.
- ↑ Online 'Mendelian Inheritance in Man' (OMIM) 601607
- ↑ 3.0 3.1 3.2 3.3 3.4 Ertan, Y.; Sezak, M.; Turhan, T.; Kantar, M.; Erşahin, Y.; Mutluer, S.; Vergin, C.; Oniz, H. et al. (Jun 2009). "Atypical teratoid/rhabdoid tumor of the central nervous system: clinicopathologic and immunohistochemical features of four cases.". Childs Nerv Syst 25 (6): 707-11. doi:10.1007/s00381-009-0811-0. PMID 19212771.