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Difference between revisions of "Seminoma"
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| Micro = fried egg-like cells (clear or eosinophilic cytoplasm, central nucleus), lymphocytic infiltrate (common), +/-[[syncytiotrophoblast]]s (rare), +/-granulomas (uncommon) | | Micro = fried egg-like cells (clear or eosinophilic cytoplasm, central nucleus), lymphocytic infiltrate (common), +/-[[syncytiotrophoblast]]s (rare), +/-granulomas (uncommon) | ||
| Subtypes = | | Subtypes = | ||
| LMDDx = [[embryonal carcinoma]], [[ | | LMDDx = [[embryonal carcinoma]], [[GCNIS]], [[mixed germ cell tumour]], [[granulomatous orchitis]], [[testicular scar]], [[atrophic testis]], [[diffuse large B-cell lymphoma]] | ||
| Stains = | | Stains = | ||
| IHC = | | IHC = OCT4 +ve, [[CD117]] +ve, CD30 -ve | ||
| EM = | | EM = | ||
| Molecular = | | Molecular = | ||
| IF = | | IF = | ||
| Gross = solid, white/tan | | Gross = solid, white/tan | ||
| Grossing = [[ | | Grossing = [[orchiectomy grossing]] | ||
| Staging = [[testicular cancer staging]] | |||
| Site = [[testis]] | | Site = [[testis]] | ||
| Assdx = [[ | | Assdx = [[GCNIS]] | ||
| Syndromes = | | Syndromes = | ||
| Clinicalhx = | | Clinicalhx = | ||
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| Symptoms = | | Symptoms = | ||
| Prevalence = | | Prevalence = | ||
| Bloodwork = LDH elevated, beta-hCG elevated | | Bloodwork = LDH elevated, beta-hCG normal or slightly elevated | ||
| Rads = | | Rads = | ||
| Endoscopy = | | Endoscopy = | ||
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| Other = | | Other = | ||
| ClinDDx = other [[testis|testicular tumours]] ([[germ cell tumour]]s, [[lymphoma]]) | | ClinDDx = other [[testis|testicular tumours]] ([[germ cell tumour]]s, [[lymphoma]]) | ||
| Tx = | |||
}} | }} | ||
'''Seminoma''' is a common [[testis|testicular]] [[germ cell tumour]]. | '''Seminoma''' is a common [[testis|testicular]] [[germ cell tumour]]. | ||
It should ''not'' be confused with | It should ''not'' be confused with ''[[spermatocytic tumour]]'' (previously known as ''spermatocytic seminoma''). | ||
==General== | ==General== | ||
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*Elevated serum LDH. | *Elevated serum LDH. | ||
*Normal serum alpha fetoprotein. | *Normal serum alpha fetoprotein. | ||
*Usually normal beta-hCG. | *Usually normal beta-hCG ''or'' slightly elevated.<ref name=pmid9311009>{{cite journal |authors=Hori K, Uematsu K, Yasoshima H, Yamada A, Sakurai K, Ohya M |title=Testicular seminoma with human chorionic gonadotropin production |journal=Pathol Int |volume=47 |issue=9 |pages=592–9 |date=September 1997 |pmid=9311009 |doi=10.1111/j.1440-1827.1997.tb04547.x |url=}}</ref> | ||
Note: | Note: | ||
| Line 45: | Line 47: | ||
===Epidemiology & etiology=== | ===Epidemiology & etiology=== | ||
*Arises from ''[[ | *Arises from ''[[germ cell neoplasia in situ]]'', abbreviated ''GCNIS'' (previously known as ''intratubular germ cell neoplasia''). | ||
==Gross== | ==Gross== | ||
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*[[Testicular scar]] - seminomas may regress spontaneously. | *[[Testicular scar]] - seminomas may regress spontaneously. | ||
*[[Testicular atrophy]] - esp. for intertubular predominant seminoma.<ref name=pmid15316315>{{Cite journal | last1 = Henley | first1 = JD. | last2 = Young | first2 = RH. | last3 = Wade | first3 = CL. | last4 = Ulbright | first4 = TM. | title = Seminomas with exclusive intertubular growth: a report of 12 clinically and grossly inconspicuous tumors. | journal = Am J Surg Pathol | volume = 28 | issue = 9 | pages = 1163-8 | month = Sep | year = 2004 | doi = | PMID = 15316315 }}</ref> | *[[Testicular atrophy]] - esp. for intertubular predominant seminoma.<ref name=pmid15316315>{{Cite journal | last1 = Henley | first1 = JD. | last2 = Young | first2 = RH. | last3 = Wade | first3 = CL. | last4 = Ulbright | first4 = TM. | title = Seminomas with exclusive intertubular growth: a report of 12 clinically and grossly inconspicuous tumors. | journal = Am J Surg Pathol | volume = 28 | issue = 9 | pages = 1163-8 | month = Sep | year = 2004 | doi = | PMID = 15316315 }}</ref> | ||
*[[Diffuse large B-cell lymphoma]] - may be OCT4 +ve and rarely SALL4 +ve.<ref name=pmid27035612>{{cite journal |authors=Williams AS, Shawwa A, Merrimen J, Dakin Haché K |title=Expression of OCT4 and SALL4 in Diffuse Large B-cell Lymphoma: An Analysis of 145 Consecutive Cases and Testicular Lymphomas |journal=Am J Surg Pathol |volume=40 |issue=7 |pages=950–7 |date=July 2016 |pmid=27035612 |doi=10.1097/PAS.0000000000000648 |url=}}</ref> | |||
===Images=== | ===Images=== | ||
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Image: Testicular seminoma (1) nodal metastasis.jpg | Seminoma in LN. (WC/KGH) | Image: Testicular seminoma (1) nodal metastasis.jpg | Seminoma in LN. (WC/KGH) | ||
Image: Testicular seminoma (2) nodal metastasis.jpg | Seminoma in LN. (WC/KGH) | Image: Testicular seminoma (2) nodal metastasis.jpg | Seminoma in LN. (WC/KGH) | ||
</gallery> | |||
====Seminoma with granulomas==== | |||
<gallery> | |||
Image: Seminoma with granulomas -- intermed mag.jpg | Seminoma with granulomas - intermed. mag. | |||
Image: Seminoma with granulomas -- high mag.jpg | Seminoma with granulomas - high mag. | |||
Image: Seminoma with granulomas -- very high mag.jpg | Seminoma with granulomas - very high mag. | |||
Image: Seminoma with granulomas --- low mag.jpg | Seminoma with granulomas - low mag. | |||
Image: Seminoma with granulomas --- intermed mag.jpg | Seminoma with granulomas - intermed. mag. | |||
Image: Seminoma with granulomas --- high mag.jpg | Seminoma with granulomas - high mag. | |||
Image: Seminoma with granulomas --- very high mag.jpg | Seminoma with granulomas - very high mag. | |||
</gallery> | </gallery> | ||
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A 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> | A 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. | *OCT4 +ve. | ||
**Choriocarcinoma, yolk sac tumour and spermatocytic | **Choriocarcinoma, yolk sac tumour and [[spermatocytic tumour]] all -ve. | ||
*CD117 +ve. | *CD117 +ve. | ||
**-ve in embryonal carcinoma. | **-ve in embryonal carcinoma. | ||
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*OCT3/4 +ve.<ref name=pmid20438407>{{Cite journal | last1 = Emerson | first1 = RE. | last2 = Ulbright | first2 = TM. | title = Intratubular germ cell neoplasia of the testis and its associated cancers: the use of novel biomarkers. | journal = Pathology | volume = 42 | issue = 4 | pages = 344-55 | month = Jun | year = 2010 | doi = 10.3109/00313021003767355 | PMID = 20438407 }}</ref> | *OCT3/4 +ve.<ref name=pmid20438407>{{Cite journal | last1 = Emerson | first1 = RE. | last2 = Ulbright | first2 = TM. | title = Intratubular germ cell neoplasia of the testis and its associated cancers: the use of novel biomarkers. | journal = Pathology | volume = 42 | issue = 4 | pages = 344-55 | month = Jun | year = 2010 | doi = 10.3109/00313021003767355 | PMID = 20438407 }}</ref> | ||
**Also +ve in embryonal carcinoma.<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> | **Also +ve in embryonal carcinoma.<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> | ||
*[[PLAP]] +ve. | |||
**Largely replaced by ''OCT4'' or ''OCT3/4'' - which is more sensitive.<ref name=pmid15725806 >{{Cite journal | last1 = Hattab | first1 = EM. | last2 = Tu | first2 = PH. | last3 = Wilson | first3 = JD. | last4 = Cheng | first4 = L. | title = OCT4 immunohistochemistry is superior to placental alkaline phosphatase (PLAP) in the diagnosis of central nervous system germinoma. | journal = Am J Surg Pathol | volume = 29 | issue = 3 | pages = 368-71 | month = Mar | year = 2005 | doi = | PMID = 15725806 }}</ref> | |||
==Sign out== | ==Sign out== | ||
<pre> | |||
Right Testicle, Radical Orchitectomy: | |||
- SEMINOMA (pure). | |||
-- Margins clear. | |||
-- Germ cell neoplasia in situ (intratubular germ cell neoplasia) present. | |||
-- Please see synoptic report. | |||
- Background testis consists of Sertoli cells only, NEGATIVE for spermatogenesis. | |||
</pre> | |||
<pre> | |||
Testis, Left, Radical Orchiectomy: | |||
- SEMINOMA (pure). | |||
-- Margins clear. | |||
-- Please see synoptic report. | |||
</pre> | |||
===Biopsy=== | |||
<pre> | <pre> | ||
RETROPERITONEAL SOFT TISSUE, RIGHT, CORE BIOPSY: | RETROPERITONEAL SOFT TISSUE, RIGHT, CORE BIOPSY: | ||
- SEMINOMA. | - SEMINOMA. | ||
</pre> | </pre> | ||
===Micro=== | |||
====Micro==== | |||
The sections show large atypical, discohesive cells with prominent nucleoli, central | The sections show large atypical, discohesive cells with prominent nucleoli, central | ||
nuclei and moderate clear cytoplasm, intermixed with mature lymphocytes. Mitotic | nuclei and moderate clear cytoplasm, intermixed with mature lymphocytes. Mitotic | ||
activity is present. | activity is present. | ||
===Small biopsy=== | ====Small biopsy==== | ||
A mixed germ cell tumour cannot be excluded; given the small quantity of tumour, this | A mixed germ cell tumour cannot be excluded; given the small quantity of tumour, this | ||
biopsy is at a high risk for having undersampled other tumour components should they be | biopsy is at a high risk for having undersampled other tumour components should they be | ||