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Difference between revisions of "Renal hybrid oncocytic/chromophobe tumour"
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Renal hybrid oncocytic/chromophobe tumour (view source)
Revision as of 15:12, 20 March 2024
, 20 Marchno edit summary
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{{ Infobox diagnosis | {{ Infobox diagnosis | ||
| Name = {{PAGENAME}} | | Name = {{PAGENAME}} | ||
| Image = | | Image = Hybrid tumour of the kidney -- high mag.jpg | ||
| Width = | | Width = | ||
| Caption = | | Caption = Hybrid oncocytic/chromophobe tumour of the kidney. [[H&E stain]]. | ||
| Synonyms = | | Synonyms = hybrid tumour | ||
| Micro = features of [[renal oncocytoma]] and [[chromophobe renal cell carcinoma]] | | Micro = features of [[renal oncocytoma]] and [[chromophobe renal cell carcinoma]] - varies by subtype | ||
| Subtypes = | | Subtypes = as per Hes ''et al.'': (1) [[collision tumour]]-type, (2) renal oncocytoma with scattered chromophobe cells-type, (3) large eosinophilic cells with intracytoplasmic vacuoles-type | ||
| LMDDx = [[renal oncocytoma]], [[chromophobe renal cell carcinoma]], [[renal cell carcinoma, unclassified]], other [[renal tumours with eosinophilic cytoplasm]] | | LMDDx = [[renal oncocytoma]], [[chromophobe renal cell carcinoma]], [[renal cell carcinoma, unclassified]], [[SDH-deficient renal cell carcinoma]], other [[renal tumours with eosinophilic cytoplasm]] | ||
| Stains = Hale's colloidal iron +ve | | Stains = Hale's colloidal iron +ve | ||
| IHC = CD117 +ve, CK7 +ve (variable) | | IHC = CD117 +ve, CK7 +ve (variable) | ||
| Line 14: | Line 14: | ||
| IF = | | IF = | ||
| Gross = | | Gross = | ||
| Grossing = | | Grossing = [[partial nephrectomy grossing]], [[total nephrectomy for tumour grossing]] | ||
| Site = [[kidney]] - see ''[[kidney tumours]]'' | | Site = [[kidney]] - see ''[[kidney tumours]]'' | ||
| Assdx = | | Assdx = | ||
| Line 40: | Line 40: | ||
*Sporadic. | *Sporadic. | ||
*[[Birt–Hogg–Dubé syndrome]]. | *[[Birt–Hogg–Dubé syndrome]]. | ||
*Renal oncocytosis. | *[[Renal oncocytosis]]. | ||
==Microscopic== | ==Microscopic== | ||
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#* Different fields viewed in isolation would be compatible with the different diagnoses. Tumour component do not intermingle. | #* Different fields viewed in isolation would be compatible with the different diagnoses. Tumour component do not intermingle. | ||
# Renal oncocytoma with scattered chromophobe cells. | # Renal oncocytoma with scattered chromophobe cells. | ||
# Large eosinophilic cell with intracytoplasmic vacuoles. | # Large eosinophilic cell with intracytoplasmic vacuoles - this is the evolving entity ''[[eosinophilic vacuolated tumour]]''. | ||
#* Prominent nucleoli ([[ISUP nucleolar grade]] 3). | |||
#* Perinuclear halos (occasional). | |||
#* Nested architecture. | |||
DDx: | DDx: | ||
*[[Renal oncocytoma]] - may have limited chromophobe-like areas (<=5% of tumour).<ref name=pmid21166703>{{Cite journal | last1 = Trpkov | first1 = K. | last2 = Yilmaz | first2 = A. | last3 = Uzer | first3 = D. | last4 = Dishongh | first4 = KM. | last5 = Quick | first5 = CM. | last6 = Bismar | first6 = TA. | last7 = Gokden | first7 = N. | title = Renal oncocytoma revisited: a clinicopathological study of 109 cases with emphasis on problematic diagnostic features. | journal = Histopathology | volume = 57 | issue = 6 | pages = 893-906 | month = Dec | year = 2010 | doi = 10.1111/j.1365-2559.2010.03726.x | PMID = 21166703 }}</ref> | *[[Renal oncocytoma]] - may have limited chromophobe-like areas (<=5% of tumour).<ref name=pmid21166703>{{Cite journal | last1 = Trpkov | first1 = K. | last2 = Yilmaz | first2 = A. | last3 = Uzer | first3 = D. | last4 = Dishongh | first4 = KM. | last5 = Quick | first5 = CM. | last6 = Bismar | first6 = TA. | last7 = Gokden | first7 = N. | title = Renal oncocytoma revisited: a clinicopathological study of 109 cases with emphasis on problematic diagnostic features. | journal = Histopathology | volume = 57 | issue = 6 | pages = 893-906 | month = Dec | year = 2010 | doi = 10.1111/j.1365-2559.2010.03726.x | PMID = 21166703 }}</ref> | ||
*[[Chromophobe renal cell carcinoma]], eosinophilic variant. | *[[Chromophobe renal cell carcinoma]], eosinophilic variant. | ||
*[[SDH-deficient renal cell carcinoma]] - lower nuclear grade, not nested. | |||
*[[Eosinophilic vacuolated tumour]] - evolving entity. | |||
*Other [[renal tumours with eosinophilic cytoplasm]]. | *Other [[renal tumours with eosinophilic cytoplasm]]. | ||
*[[Renal cell carcinoma, unclassified]]. | *[[Renal cell carcinoma, unclassified]]. | ||
===Images=== | |||
====Case 1==== | |||
<gallery> | |||
Image: Hybrid tumour of the kidney -- low mag.jpg | HOCT - low mag. (WC) | |||
Image: Hybrid tumour of the kidney -- intermed mag.jpg | HOCT - intermed. mag. (WC) | |||
Image: Hybrid tumour of the kidney -- high mag.jpg | HOCT - high mag. (WC) | |||
</gallery> | |||
====Case 2==== | |||
<gallery> | |||
Image: Renal hybrid tumour - 2 -- intermed mag.jpg | HOCT - intermed. mag. (WC) | |||
Image: Renal hybrid tumour - 2 -- high mag.jpg | HOCT - high mag. (WC) | |||
Image: Renal hybrid tumour - 2 -- very high mag.jpg | HOCT - very high mag. (WC) | |||
Image: Renal hybrid tumour - nests - 2 -- intermed mag.jpg | HOCT - intermed. mag. (WC) | |||
Image: Renal hybrid tumour - nests - 2 -- high mag.jpg | HOCT - high mag. (WC) | |||
Image: Renal hybrid tumour - nests - 2 -- very high mag.jpg | HOCT - very high mag. (WC) | |||
</gallery> | |||
==Stains== | ==Stains== | ||
| Line 62: | Line 85: | ||
Features: | Features: | ||
*CD117 +ve (practically definitional<ref name=pmid23740406/>). | *CD117 +ve (practically definitional<ref name=pmid23740406/>). | ||
*CK7 +ve - | *CK7 +ve - often variable/patchy (oncocytoma-like).<ref name=pmid23708994/> | ||
Others: | |||
*Vimentin -ve. | |||
*EMA +ve. | |||
*CD10 +ve. | |||
*PAX8 +ve. | |||
==Molecular== | ==Molecular== | ||
*No features characteristic of [[chromophobe RCC]] on array-CGH analysis.<ref name=pmid23708994/> | *No features characteristic of [[chromophobe RCC]] on array-CGH analysis.<ref name=pmid23708994/> | ||
==Sign out== | |||
<pre> | |||
Left Kidney, Partial Nephrectomy: | |||
- Renal tumour with eosinophilic cytoplasm of undetermined malignant potential | |||
in keeping with the so called "hybrid oncocytic/chromophobe tumour", see comment. | |||
-- Resection margins clear. | |||
-- Tumour limited to kidney. | |||
Comment: | |||
The tumour may be seen in the context of Birt–Hogg–Dubé syndrome. | |||
</pre> | |||
==See also== | ==See also== | ||
*[[Renal tumours with eosinophilic cytoplasm]]. | *[[Renal tumours with eosinophilic cytoplasm]]. | ||
*[[Renal oncocytoma]]. | *[[Renal oncocytoma]]. | ||
*[[High-grade oncocytic renal tumour]]. | |||
==References== | ==References== | ||