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Difference between revisions of "Brain metastasis"
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'''Brain metastasis''', also '''metastatic brain tumour''', is a [[brain tumour]] that arose elsewhere and spread to the brain. | |||
==General== | |||
*Most common brain tumour in adults.<ref>{{Cite journal | last1 = Pekmezci | first1 = M. | last2 = Perry | first2 = A. | title = Neuropathology of brain metastases. | journal = Surg Neurol Int | volume = 4 | issue = Suppl 4 | pages = S245-55 | month = | year = 2013 | doi = 10.4103/2152-7806.111302 | PMID = 23717796 }}</ref><ref>{{Cite journal | last1 = Suki | first1 = D. | last2 = Khoury Abdulla | first2 = R. | last3 = Ding | first3 = M. | last4 = Khatua | first4 = S. | last5 = Sawaya | first5 = R. | title = Brain metastases in patients diagnosed with a solid primary cancer during childhood: experience from a single referral cancer center. | journal = J Neurosurg Pediatr | volume = 14 | issue = 4 | pages = 372-85 | month = Oct | year = 2014 | doi = 10.3171/2014.7.PEDS13318 | PMID = 25127097 }}</ref> | |||
*Common metastases (in order): [[lung cancer|lung]], [[invasive breast cancer|breast]], [[renal cell carcinoma|kidney]], [[Gastrointestinal pathology|gastrointestinal]], [[melanoma]].<ref>{{Ref TN2007|NS9}}</ref> | |||
*Percentage of previously diagnosed cancers with brain metastases - by primary site: lung cancer 19.9%, melanoma 6.9%, breast cancer 5.1%, renal cancer 6.5%, colorectal cancer 1.8%.<ref name=pmid15254054>{{Cite journal | last1 = Barnholtz-Sloan | first1 = JS. | last2 = Sloan | first2 = AE. | last3 = Davis | first3 = FG. | last4 = Vigneau | first4 = FD. | last5 = Lai | first5 = P. | last6 = Sawaya | first6 = RE. | title = Incidence proportions of brain metastases in patients diagnosed (1973 to 2001) in the Metropolitan Detroit Cancer Surveillance System. | journal = J Clin Oncol | volume = 22 | issue = 14 | pages = 2865-72 | month = Jul | year = 2004 | doi = 10.1200/JCO.2004.12.149 | PMID = 15254054 }}</ref> | |||
**''Lung'' followed by ''kidney'' is the order in a smaller series.<ref>{{Cite journal | last1 = Schouten | first1 = LJ. | last2 = Rutten | first2 = J. | last3 = Huveneers | first3 = HA. | last4 = Twijnstra | first4 = A. | title = Incidence of brain metastases in a cohort of patients with carcinoma of the breast, colon, kidney, and lung and melanoma. | journal = Cancer | volume = 94 | issue = 10 | pages = 2698-705 | month = May | year = 2002 | doi = | PMID = 12173339 }}</ref> | |||
==Microscopic== | |||
Appearance varies by subtype. | |||
Features of metastatic carcinoma: | |||
*Tubule formation/glands. | |||
*Usually well-circumscribed/sharply demarcated from surrounding tissue. | |||
*Usually nuclear atypia including: | |||
**Nuclear hyperchromasia. | |||
**Variation of nuclear size. | |||
**Variation of nuclear shape. | |||
*Mitoses - common. | |||
DDx: | |||
*Primary brain tumour - ''see [[Neuropathology_tumours#Primary_versus_secondary|primary brain tumour versus secondary brain tumour]]''. | |||
===Images=== | |||
<gallery> | |||
Image:Metastatic_adenocarcinoma_-_cerebellum_-_very_low_mag.jpg | [[CRC]] metastasis to cerebellum - very low mag. (WC) | |||
Image:Metastatic adenocarcinoma - cerebellum - intermed mag.jpg| CRC metastasis to the cerebellum - intermed. mag. (WC) | |||
Image:Metastatic_adenocarcinoma_-_cerebellum_-_high_mag.jpg | CRC metastasis to cerebellum - high mag. (WC) | |||
Image:Brain metastasis - high mag.jpg | Brain metastasis - high mag. (WC) | |||
</gallery> | |||
==IHC== | |||
{{Main|Immunohistochemistry}} | |||
*Carcinoma: pankeratin +ve. | |||
**[[Lung adenocarcinoma]] and SCLC: TTF-1 +ve, CK7 +ve, CK20 -ve. | |||
**Breast carcinoma: CK7 +ve, ER +ve, PR +ve, BRST2 +ve/-ve. | |||
**Colorectal carcinoma: CK7 -ve, CK20 +ve, CDX2 +ve, TTF-1 -ve. | |||
**[[Clear cell renal cell carcinoma]]: PAX8 +ve, CK7 -ve, CK20 -ve, vimentin +ve, CD10 +ve. | |||
*Melanoma: S-100 +ve, HMB-45 +ve, Melan A +ve. | |||
==See also== | |||
*[[Neuropathology tumours]]. | |||
*[[Metastasis]]. | |||
==References== | |||
{{Reflist|2}} | |||
[[Category:Neuropathology]] | |||