Low-grade oncocytic tumour of kidney (CD117-negative, cytokeratin 7-positive)

a distinct entity?

Kiril Trpkov, Sean R. Williamson, Yuan Gao, Petr Martinek, Liang Cheng, Ankur R. Sangoi, Asli Yilmaz, Cheng Wang, Pilar San Miguel Fraile, Delia M. Perez Montiel, Stela Bulimbasić, Joanna Rogala, Ondrej Hes

Research output: Contribution to journalArticle

Abstract

Aim: To describe a group of distinct low-grade oncocytic renal tumours that demonstrate CD117 negative/cytokeratin (CK) 7-positive immunoprofile. Methods and results: We identified 28 such tumours from four large renal tumour archives. We performed immunohistochemistry for: CK7, CD117, PAX8, CD10, AMACR, e-cadherin, CK20, CA9, AE1/AE3, vimentin, BerEP4, MOC31, CK5/6, p63, HMB45, melan A, CD15 and FH. In 14 cases we performed array CGH, with a successful result in nine cases. Median patient age was 66 years (range 49–78 years) with a male-to-female ratio of 1:1.8. Median tumour size was 3 cm (range 1.1–13.5 cm). All were single tumours, solid and tan-brown, without a syndromic association. On microscopy, all cases showed solid and compact nested growth. There were frequent areas of oedematous stroma with loosely arranged cells. The tumour cells had oncocytic cytoplasm with uniformly round to oval nuclei, but without significant irregularities, and showed only focal perinuclear halos. Negative CD117 and positive CK7 reactivity were present in all cases (in two cases there was focal and very weak CD117 reactivity). Uniform reactivity was found for PAX8, AE1/AE3, e-cadherin, BerEP4 and MOC31. Negative stains included CA9, CK20, vimentin, CK5/6, p63, HMB45, Melan A and CD15. CD10 and AMACR were either negative or focally positive; FH was retained. On array CGH, there were frequent deletions at 19p13.3 (seven of nine), 1p36.33 (five of nine) and 19q13.11 (four of nine); disomic status was found in two of nine cases. On follow-up (mean 31.8 months, range 1–118), all patients were alive with no disease progression. Conclusion: Low-grade oncocytic tumours that are CD117-negative/CK7-positive demonstrate consistent and readily recognisable morphology, immunoprofile and indolent behaviour.

Original languageEnglish (US)
JournalHistopathology
DOIs
StatePublished - Jan 1 2019

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Keratin-7
Kidney
Neoplasms
MART-1 Antigen
Vimentin
Cadherins
Disease Progression
Microscopy
Cytoplasm
Coloring Agents
Immunohistochemistry
Growth

Keywords

  • chromophobe renal cell carcinoma
  • hybrid oncocytic tumour
  • hybrid tumour
  • low-grade oncocytic tumour
  • oncocytoma
  • unclassified oncocytic tumour
  • unclassified renal carcinoma

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology

Cite this

Low-grade oncocytic tumour of kidney (CD117-negative, cytokeratin 7-positive) : a distinct entity? / Trpkov, Kiril; Williamson, Sean R.; Gao, Yuan; Martinek, Petr; Cheng, Liang; Sangoi, Ankur R.; Yilmaz, Asli; Wang, Cheng; San Miguel Fraile, Pilar; Perez Montiel, Delia M.; Bulimbasić, Stela; Rogala, Joanna; Hes, Ondrej.

In: Histopathology, 01.01.2019.

Research output: Contribution to journalArticle

Trpkov, K, Williamson, SR, Gao, Y, Martinek, P, Cheng, L, Sangoi, AR, Yilmaz, A, Wang, C, San Miguel Fraile, P, Perez Montiel, DM, Bulimbasić, S, Rogala, J & Hes, O 2019, 'Low-grade oncocytic tumour of kidney (CD117-negative, cytokeratin 7-positive): a distinct entity?', Histopathology. https://doi.org/10.1111/his.13865
Trpkov, Kiril ; Williamson, Sean R. ; Gao, Yuan ; Martinek, Petr ; Cheng, Liang ; Sangoi, Ankur R. ; Yilmaz, Asli ; Wang, Cheng ; San Miguel Fraile, Pilar ; Perez Montiel, Delia M. ; Bulimbasić, Stela ; Rogala, Joanna ; Hes, Ondrej. / Low-grade oncocytic tumour of kidney (CD117-negative, cytokeratin 7-positive) : a distinct entity?. In: Histopathology. 2019.
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title = "Low-grade oncocytic tumour of kidney (CD117-negative, cytokeratin 7-positive): a distinct entity?",
abstract = "Aim: To describe a group of distinct low-grade oncocytic renal tumours that demonstrate CD117 negative/cytokeratin (CK) 7-positive immunoprofile. Methods and results: We identified 28 such tumours from four large renal tumour archives. We performed immunohistochemistry for: CK7, CD117, PAX8, CD10, AMACR, e-cadherin, CK20, CA9, AE1/AE3, vimentin, BerEP4, MOC31, CK5/6, p63, HMB45, melan A, CD15 and FH. In 14 cases we performed array CGH, with a successful result in nine cases. Median patient age was 66 years (range 49–78 years) with a male-to-female ratio of 1:1.8. Median tumour size was 3 cm (range 1.1–13.5 cm). All were single tumours, solid and tan-brown, without a syndromic association. On microscopy, all cases showed solid and compact nested growth. There were frequent areas of oedematous stroma with loosely arranged cells. The tumour cells had oncocytic cytoplasm with uniformly round to oval nuclei, but without significant irregularities, and showed only focal perinuclear halos. Negative CD117 and positive CK7 reactivity were present in all cases (in two cases there was focal and very weak CD117 reactivity). Uniform reactivity was found for PAX8, AE1/AE3, e-cadherin, BerEP4 and MOC31. Negative stains included CA9, CK20, vimentin, CK5/6, p63, HMB45, Melan A and CD15. CD10 and AMACR were either negative or focally positive; FH was retained. On array CGH, there were frequent deletions at 19p13.3 (seven of nine), 1p36.33 (five of nine) and 19q13.11 (four of nine); disomic status was found in two of nine cases. On follow-up (mean 31.8 months, range 1–118), all patients were alive with no disease progression. Conclusion: Low-grade oncocytic tumours that are CD117-negative/CK7-positive demonstrate consistent and readily recognisable morphology, immunoprofile and indolent behaviour.",
keywords = "chromophobe renal cell carcinoma, hybrid oncocytic tumour, hybrid tumour, low-grade oncocytic tumour, oncocytoma, unclassified oncocytic tumour, unclassified renal carcinoma",
author = "Kiril Trpkov and Williamson, {Sean R.} and Yuan Gao and Petr Martinek and Liang Cheng and Sangoi, {Ankur R.} and Asli Yilmaz and Cheng Wang and {San Miguel Fraile}, Pilar and {Perez Montiel}, {Delia M.} and Stela Bulimbasić and Joanna Rogala and Ondrej Hes",
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T1 - Low-grade oncocytic tumour of kidney (CD117-negative, cytokeratin 7-positive)

T2 - a distinct entity?

AU - Trpkov, Kiril

AU - Williamson, Sean R.

AU - Gao, Yuan

AU - Martinek, Petr

AU - Cheng, Liang

AU - Sangoi, Ankur R.

AU - Yilmaz, Asli

AU - Wang, Cheng

AU - San Miguel Fraile, Pilar

AU - Perez Montiel, Delia M.

AU - Bulimbasić, Stela

AU - Rogala, Joanna

AU - Hes, Ondrej

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Aim: To describe a group of distinct low-grade oncocytic renal tumours that demonstrate CD117 negative/cytokeratin (CK) 7-positive immunoprofile. Methods and results: We identified 28 such tumours from four large renal tumour archives. We performed immunohistochemistry for: CK7, CD117, PAX8, CD10, AMACR, e-cadherin, CK20, CA9, AE1/AE3, vimentin, BerEP4, MOC31, CK5/6, p63, HMB45, melan A, CD15 and FH. In 14 cases we performed array CGH, with a successful result in nine cases. Median patient age was 66 years (range 49–78 years) with a male-to-female ratio of 1:1.8. Median tumour size was 3 cm (range 1.1–13.5 cm). All were single tumours, solid and tan-brown, without a syndromic association. On microscopy, all cases showed solid and compact nested growth. There were frequent areas of oedematous stroma with loosely arranged cells. The tumour cells had oncocytic cytoplasm with uniformly round to oval nuclei, but without significant irregularities, and showed only focal perinuclear halos. Negative CD117 and positive CK7 reactivity were present in all cases (in two cases there was focal and very weak CD117 reactivity). Uniform reactivity was found for PAX8, AE1/AE3, e-cadherin, BerEP4 and MOC31. Negative stains included CA9, CK20, vimentin, CK5/6, p63, HMB45, Melan A and CD15. CD10 and AMACR were either negative or focally positive; FH was retained. On array CGH, there were frequent deletions at 19p13.3 (seven of nine), 1p36.33 (five of nine) and 19q13.11 (four of nine); disomic status was found in two of nine cases. On follow-up (mean 31.8 months, range 1–118), all patients were alive with no disease progression. Conclusion: Low-grade oncocytic tumours that are CD117-negative/CK7-positive demonstrate consistent and readily recognisable morphology, immunoprofile and indolent behaviour.

AB - Aim: To describe a group of distinct low-grade oncocytic renal tumours that demonstrate CD117 negative/cytokeratin (CK) 7-positive immunoprofile. Methods and results: We identified 28 such tumours from four large renal tumour archives. We performed immunohistochemistry for: CK7, CD117, PAX8, CD10, AMACR, e-cadherin, CK20, CA9, AE1/AE3, vimentin, BerEP4, MOC31, CK5/6, p63, HMB45, melan A, CD15 and FH. In 14 cases we performed array CGH, with a successful result in nine cases. Median patient age was 66 years (range 49–78 years) with a male-to-female ratio of 1:1.8. Median tumour size was 3 cm (range 1.1–13.5 cm). All were single tumours, solid and tan-brown, without a syndromic association. On microscopy, all cases showed solid and compact nested growth. There were frequent areas of oedematous stroma with loosely arranged cells. The tumour cells had oncocytic cytoplasm with uniformly round to oval nuclei, but without significant irregularities, and showed only focal perinuclear halos. Negative CD117 and positive CK7 reactivity were present in all cases (in two cases there was focal and very weak CD117 reactivity). Uniform reactivity was found for PAX8, AE1/AE3, e-cadherin, BerEP4 and MOC31. Negative stains included CA9, CK20, vimentin, CK5/6, p63, HMB45, Melan A and CD15. CD10 and AMACR were either negative or focally positive; FH was retained. On array CGH, there were frequent deletions at 19p13.3 (seven of nine), 1p36.33 (five of nine) and 19q13.11 (four of nine); disomic status was found in two of nine cases. On follow-up (mean 31.8 months, range 1–118), all patients were alive with no disease progression. Conclusion: Low-grade oncocytic tumours that are CD117-negative/CK7-positive demonstrate consistent and readily recognisable morphology, immunoprofile and indolent behaviour.

KW - chromophobe renal cell carcinoma

KW - hybrid oncocytic tumour

KW - hybrid tumour

KW - low-grade oncocytic tumour

KW - oncocytoma

KW - unclassified oncocytic tumour

KW - unclassified renal carcinoma

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U2 - 10.1111/his.13865

DO - 10.1111/his.13865

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JO - Histopathology

JF - Histopathology

SN - 0309-0167

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