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Difference between revisions of "Embryonal carcinoma"
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| Width = | | Width = | ||
| Caption = Embryonal carcinoma. [[H&E stain]]. | | Caption = Embryonal carcinoma. [[H&E stain]]. | ||
| Micro = vesicular nuclei, nuclear overlap, necrosis (common), mitoses, variable architecture (tubulopapillary, glandular, solid, embryoid bodies) | | Micro = [[vesicular nuclei]], nuclear overlap, necrosis (common), mitoses, variable architecture (tubulopapillary, glandular, solid, embryoid bodies) | ||
| Subtypes = | | Subtypes = | ||
| LMDDx = [[seminoma]], [[mixed germ cell tumour]], [[yolk sac tumour]], other carcinomas | | LMDDx = [[seminoma]], [[mixed germ cell tumour]], [[yolk sac tumour]], other carcinomas | ||
| Stains = | | Stains = | ||
| IHC = CD30 +ve, AE1/AE3 +ve | | IHC = OCT3 +ve, CD30 +ve, AE1/AE3 +ve, CD117 -ve | ||
| EM = | | EM = | ||
| Molecular = | | Molecular = | ||
| IF = | | IF = | ||
| Gross = | | Gross = | ||
| Grossing = | | Grossing = [[orchiectomy grossing]] | ||
| Staging = [[testicular cancer staging]] | |||
| Site = [[testis]], [[ovary]], [[mediastinum]] | | Site = [[testis]], [[ovary]], [[mediastinum]] | ||
| Assdx = | | Assdx = | ||
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| Signs = testicular mass, pelvic mass | | Signs = testicular mass, pelvic mass | ||
| Symptoms = | | Symptoms = | ||
| Prevalence = | | Prevalence = pure embryonal uncommon | ||
| Bloodwork = | | Bloodwork = | ||
| Rads = | | Rads = | ||
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| Prognosis = | | Prognosis = | ||
| Other = | | Other = | ||
| ClinDDx = | | ClinDDx = typically other [[testicle|testicular tumours]] | ||
}} | }} | ||
'''Embryonal carcinoma''' is a type of [[germ cell tumour]]. It is commonly as a component of [[mixed germ cell tumour]]s. | '''Embryonal carcinoma''' is a type of [[germ cell tumour]]. It is commonly as a component of [[mixed germ cell tumour]]s. | ||
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*Affects young adults. | *Affects young adults. | ||
**May be seen in women. | **May be seen in women. | ||
*Usually a component of a [[mixed germ cell tumour]] - in the [[testicle]] 85% of cases are mixed, only 15% are pure.<ref name=pmid24503753/> | |||
==Gross== | ==Gross== | ||
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Features:<ref name=Ref_GUP549>{{Ref GUP|549}}</ref> | Features:<ref name=Ref_GUP549>{{Ref GUP|549}}</ref> | ||
#Nucleoli - '''key feature'''. | #Nucleoli - '''key feature'''. | ||
#Vesicular nuclei (clear, empty appearing nuclei) - '''key feature'''. | #[[Vesicular nuclei]] (clear, empty appearing nuclei) - '''key feature'''. | ||
#Nuclei overlap. | #Nuclei overlap. | ||
#[[Necrosis]] - common. | #[[Necrosis]] - common. | ||
| Line 47: | Line 49: | ||
#Indistinct cell borders | #Indistinct cell borders | ||
#Mitoses - common. | #Mitoses - common. | ||
#Variable architecture: | #Variable architecture:<ref name=pmid24503753>{{Cite journal | last1 = Kao | first1 = CS. | last2 = Ulbright | first2 = TM. | last3 = Young | first3 = RH. | last4 = Idrees | first4 = MT. | title = Testicular embryonal carcinoma: a morphologic study of 180 cases highlighting unusual and unemphasized aspects. | journal = Am J Surg Pathol | volume = 38 | issue = 5 | pages = 689-97 | month = May | year = 2014 | doi = 10.1097/PAS.0000000000000171 | PMID = 24503753 }}</ref> | ||
#* | #*Solid (predominant in ~55% of cases). | ||
#*Glandular. | #*Glandular (predominant in ~17% of cases). | ||
#* | #*Papillary (predominant in ~11% of cases). | ||
#*Nested. | |||
#*Micropapillary. | |||
#*Anastomosing glandular. | |||
#*Sieve-like glandular. | |||
#*Pseudopapillary. | |||
#*Blastocyst-like. | |||
#*Embryoid bodies - ball of cells in surrounded by empty space on three sides. | #*Embryoid bodies - ball of cells in surrounded by empty space on three sides. | ||
Notes: | Notes: | ||
*Cytoplasmic staining variable (eosinophilic to basophilic). | *Cytoplasmic staining variable (eosinophilic to basophilic). | ||
*[[Syncytiotrophoblasts]] commonly seen (~40-50% of cases<ref name=pmid24503753/>). | |||
DDx: | DDx: | ||
*[[Mixed germ cell tumour]]. | *[[Mixed germ cell tumour]]. | ||
*[[Yolk sac tumour]]. | *[[Yolk sac tumour]]. | ||
*[[Seminoma]]. | |||
===Images=== | ===Images=== | ||
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==IHC== | ==IHC== | ||
===ISUP consensus=== | |||
General panel:<ref name=pmid24832161>{{cite journal |author=Ulbright TM, Tickoo SK, Berney DM, Srigley JR |title=Best practices recommendations in the application of immunohistochemistry in testicular tumors: report from the international society of urological pathology consensus conference |journal=Am. J. Surg. Pathol. |volume=38 |issue=8 |pages=e50–9 |year=2014 |month=August |pmid=24832161 |doi=10.1097/PAS.0000000000000233 |url=}}</ref> | |||
*OCT4 +ve. | |||
**Choriocarcinoma, yolk sac tumour and spermatocytic seminoma all -ve. | |||
*CD30 +ve. | |||
**-ve in [[seminoma]]. | |||
*CD117 -ve.<ref name=pmid17277761/> | |||
**+ve in [[seminoma]]. | |||
===Additional notes=== | |||
*CK19 -ve.<ref>{{Cite journal | last1 = Bremmer | first1 = F. | last2 = Ströbel | first2 = P. | last3 = Hubertus | first3 = H. | last4 = Strecker | first4 = J. | last5 = Gaisa | first5 = N. | last6 = Strauß | first6 = A. | last7 = Schweyer | first7 = S. | last8 = Radzun | first8 = H-J. | last9 = Behnes | first9 = C-L | title = CK19 is a sensitive marker for yolk sac tumours of the testis. | journal = Diagnostic Pathology | volume = 10 | issue = 7 | pages = | month = | year = 2015 | doi = 10.1186/s13000-015-0243-y | PMID = | url = www.diagnosticpathology.org/content/10/1/7Cached }}</ref> | |||
**[[Yolk sac tumour]] +ve, seminoma -ve, [[GCNIS]] (ITGCN) -ve, normal testis -ve. | |||
*AE1/AE3 +ve. | *AE1/AE3 +ve. | ||
*OCT3/4 +ve.<ref name=pmid18045648>{{Cite journal | last1 = Iczkowski | first1 = KA. | last2 = Butler | first2 = SL. | last3 = Shanks | first3 = JH. | last4 = Hossain | first4 = D. | last5 = Schall | first5 = A. | last6 = Meiers | first6 = I. | last7 = Zhou | first7 = M. | last8 = Torkko | first8 = KC. | last9 = Kim | first9 = SJ. | title = Trials of new germ cell immunohistochemical stains in 93 extragonadal and metastatic germ cell tumors. | journal = Hum Pathol | volume = 39 | issue = 2 | pages = 275-81 | month = Feb | year = 2008 | doi = 10.1016/j.humpath.2007.07.002 | PMID = 18045648 }}</ref> | |||
*OCT3/4 | *D2-40 -ve.<ref name=pmid18045648/> | ||
**Seminoma +ve. | **Iczkowski ''et al.'' suggest it is useful for discriminating from [[seminoma]]. This is somewhat disputed by Lau ''et al.''<ref name=pmid17277761>{{Cite journal | last1 = Lau | first1 = SK. | last2 = Weiss | first2 = LM. | last3 = Chu | first3 = PG. | title = D2-40 immunohistochemistry in the differential diagnosis of seminoma and embryonal carcinoma: a comparative immunohistochemical study with KIT (CD117) and CD30. | journal = Mod Pathol | volume = 20 | issue = 3 | pages = 320-5 | month = Mar | year = 2007 | doi = 10.1038/modpathol.3800749 | PMID = 17277761 }}</ref> | ||
*[[PLAP]] +ve.<ref name=pmid6209917>{{Cite journal | last1 = Jacobsen | first1 = GK. | last2 = Nørgaard-Pedersen | first2 = B. | title = Placental alkaline phosphatase in testicular germ cell tumours and in carcinoma-in-situ of the testis. An immunohistochemical study. | journal = Acta Pathol Microbiol Immunol Scand A | volume = 92 | issue = 5 | pages = 323-9 | month = Sep | year = 1984 | doi = | PMID = 6209917 }}</ref> | |||
*CK7 +ve/-ve (~50% have weak staining).<ref name=pmid30359635>{{cite journal |authors=Wegman SJ, Parwani AV, Zynger DL |title=Cytokeratin 7, inhibin, and p63 in testicular germ cell tumor: superior markers of choriocarcinoma compared to β-human chorionic gonadotropin |journal=Hum Pathol |volume=84 |issue= |pages=254–261 |date=February 2019 |pmid=30359635 |doi=10.1016/j.humpath.2018.10.007 |url=}}</ref> | |||
**Seminoma -ve, choriocarcinoma +ve. | |||
==See also== | ==See also== | ||