Histological spectrum of angiofibroma of soft tissue: histological and genetic analysis of 13 cases

Yuichi Yamada, Hidetaka Yamamoto, Kenichi Kouhashi, Takeaki Ishii, Kunio Iura, Akira Maekawa, Hirofumi Bekki, Hiroshi Otsuka, Kyoko Yamashita, Hiroyuki Tanaka, Tsubasa Hiraki, Munenori Mukai, Atsuko Shirakawa, Yoko Shinnou, Mari Jinno, Hiroyuki Yanai, Kenichi Taguchi, Yoshihiko Maehara, Yukihide Iwamoto, Yoshinao Oda

Research output: Contribution to journalArticle

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Abstract

Aims: Angiofibroma of soft tissue (AFST) is a rare soft tissue neoplasm characterized by a fibroblastic cytomorphology and a prominent vascular structure. AFSTs possess a novel fusion gene, i.e. NCOA2–AHRR/AHRR–NCOA2 or GTF2I–NCOA2, providing a useful approach to diagnosing AFST. Morphologically, AFSTs span a wide spectrum, making diagnosis a challenge. The aim of this study was to review AFST cases and to report previously unknown histological features, which we confirmed by genetic analysis. Methods and results: We reviewed 276 cases diagnosed as solitary fibrous tumours/haemangiopericytomas (232 cases), unclassified tumours of fibroblastic differentiation (36 cases), and recently diagnosed AFSTs (eight cases), and retrieved 13 cases compatible with AFST. Immunohistochemical staining was performed for these cases, all 13 of which were analysed by reverse transcription polymerase chain reaction and fluorescence in-situ hybridization. The histological findings were as follows: amianthoid fibres, extravasation of red blood cells, haemosiderin deposition, aggregates of foamy histiocytes, cystic change, necrosis, and haemorrhage. Immunohistochemically, the tumour cells were positive for epithelial membrane antigen (four of 13 cases), desmin (six of 13 cases), CD163 (13 of 13 cases), CD68 (seven of 13 cases), oestrogen receptor (13 of 13 cases), progesterone receptor (three of 13 cases), and STAT6 (one of 13 cases, weak nuclear staining), but they were negative for CD34, α-smooth muscle actin, muscle-specific actin, S100, pan-cytokeratin, MDM2, and CDK4. The AHRR–NCOA2 fusion gene was detected in eight cases, and NCOA2 gene rearrangement in nine cases. Conclusion: We revealed the previously unreported histological variation and immunohistochemical findings of AFST, and confirmed them by using genetic methods. The results suggested that AFST should be considered in the diagnosis of fibrous or fibrohistiocytic tumours with the above histological features.

Original languageEnglish
Pages (from-to)459-469
Number of pages11
JournalHistopathology
Volume69
Issue number3
DOIs
Publication statusPublished - Sep 1 2016

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Angiofibroma
Gene Fusion
Actins
Soft Tissue Neoplasms
Solitary Fibrous Tumors
Hemosiderin
Hemangiopericytoma
Negative Staining
Mucin-1
Neoplasms
Histiocytes
Desmin
Gene Rearrangement
Progesterone Receptors
Keratins
Fluorescence In Situ Hybridization
Estrogen Receptors
Reverse Transcription
Smooth Muscle
Blood Vessels

All Science Journal Classification (ASJC) codes

  • Pathology and Forensic Medicine
  • Histology

Cite this

Histological spectrum of angiofibroma of soft tissue : histological and genetic analysis of 13 cases. / Yamada, Yuichi; Yamamoto, Hidetaka; Kouhashi, Kenichi; Ishii, Takeaki; Iura, Kunio; Maekawa, Akira; Bekki, Hirofumi; Otsuka, Hiroshi; Yamashita, Kyoko; Tanaka, Hiroyuki; Hiraki, Tsubasa; Mukai, Munenori; Shirakawa, Atsuko; Shinnou, Yoko; Jinno, Mari; Yanai, Hiroyuki; Taguchi, Kenichi; Maehara, Yoshihiko; Iwamoto, Yukihide; Oda, Yoshinao.

In: Histopathology, Vol. 69, No. 3, 01.09.2016, p. 459-469.

Research output: Contribution to journalArticle

Yamada, Y, Yamamoto, H, Kouhashi, K, Ishii, T, Iura, K, Maekawa, A, Bekki, H, Otsuka, H, Yamashita, K, Tanaka, H, Hiraki, T, Mukai, M, Shirakawa, A, Shinnou, Y, Jinno, M, Yanai, H, Taguchi, K, Maehara, Y, Iwamoto, Y & Oda, Y 2016, 'Histological spectrum of angiofibroma of soft tissue: histological and genetic analysis of 13 cases', Histopathology, vol. 69, no. 3, pp. 459-469. https://doi.org/10.1111/his.12943
Yamada, Yuichi ; Yamamoto, Hidetaka ; Kouhashi, Kenichi ; Ishii, Takeaki ; Iura, Kunio ; Maekawa, Akira ; Bekki, Hirofumi ; Otsuka, Hiroshi ; Yamashita, Kyoko ; Tanaka, Hiroyuki ; Hiraki, Tsubasa ; Mukai, Munenori ; Shirakawa, Atsuko ; Shinnou, Yoko ; Jinno, Mari ; Yanai, Hiroyuki ; Taguchi, Kenichi ; Maehara, Yoshihiko ; Iwamoto, Yukihide ; Oda, Yoshinao. / Histological spectrum of angiofibroma of soft tissue : histological and genetic analysis of 13 cases. In: Histopathology. 2016 ; Vol. 69, No. 3. pp. 459-469.
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abstract = "Aims: Angiofibroma of soft tissue (AFST) is a rare soft tissue neoplasm characterized by a fibroblastic cytomorphology and a prominent vascular structure. AFSTs possess a novel fusion gene, i.e. NCOA2–AHRR/AHRR–NCOA2 or GTF2I–NCOA2, providing a useful approach to diagnosing AFST. Morphologically, AFSTs span a wide spectrum, making diagnosis a challenge. The aim of this study was to review AFST cases and to report previously unknown histological features, which we confirmed by genetic analysis. Methods and results: We reviewed 276 cases diagnosed as solitary fibrous tumours/haemangiopericytomas (232 cases), unclassified tumours of fibroblastic differentiation (36 cases), and recently diagnosed AFSTs (eight cases), and retrieved 13 cases compatible with AFST. Immunohistochemical staining was performed for these cases, all 13 of which were analysed by reverse transcription polymerase chain reaction and fluorescence in-situ hybridization. The histological findings were as follows: amianthoid fibres, extravasation of red blood cells, haemosiderin deposition, aggregates of foamy histiocytes, cystic change, necrosis, and haemorrhage. Immunohistochemically, the tumour cells were positive for epithelial membrane antigen (four of 13 cases), desmin (six of 13 cases), CD163 (13 of 13 cases), CD68 (seven of 13 cases), oestrogen receptor (13 of 13 cases), progesterone receptor (three of 13 cases), and STAT6 (one of 13 cases, weak nuclear staining), but they were negative for CD34, α-smooth muscle actin, muscle-specific actin, S100, pan-cytokeratin, MDM2, and CDK4. The AHRR–NCOA2 fusion gene was detected in eight cases, and NCOA2 gene rearrangement in nine cases. Conclusion: We revealed the previously unreported histological variation and immunohistochemical findings of AFST, and confirmed them by using genetic methods. The results suggested that AFST should be considered in the diagnosis of fibrous or fibrohistiocytic tumours with the above histological features.",
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AU - Yamada, Yuichi

AU - Yamamoto, Hidetaka

AU - Kouhashi, Kenichi

AU - Ishii, Takeaki

AU - Iura, Kunio

AU - Maekawa, Akira

AU - Bekki, Hirofumi

AU - Otsuka, Hiroshi

AU - Yamashita, Kyoko

AU - Tanaka, Hiroyuki

AU - Hiraki, Tsubasa

AU - Mukai, Munenori

AU - Shirakawa, Atsuko

AU - Shinnou, Yoko

AU - Jinno, Mari

AU - Yanai, Hiroyuki

AU - Taguchi, Kenichi

AU - Maehara, Yoshihiko

AU - Iwamoto, Yukihide

AU - Oda, Yoshinao

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N2 - Aims: Angiofibroma of soft tissue (AFST) is a rare soft tissue neoplasm characterized by a fibroblastic cytomorphology and a prominent vascular structure. AFSTs possess a novel fusion gene, i.e. NCOA2–AHRR/AHRR–NCOA2 or GTF2I–NCOA2, providing a useful approach to diagnosing AFST. Morphologically, AFSTs span a wide spectrum, making diagnosis a challenge. The aim of this study was to review AFST cases and to report previously unknown histological features, which we confirmed by genetic analysis. Methods and results: We reviewed 276 cases diagnosed as solitary fibrous tumours/haemangiopericytomas (232 cases), unclassified tumours of fibroblastic differentiation (36 cases), and recently diagnosed AFSTs (eight cases), and retrieved 13 cases compatible with AFST. Immunohistochemical staining was performed for these cases, all 13 of which were analysed by reverse transcription polymerase chain reaction and fluorescence in-situ hybridization. The histological findings were as follows: amianthoid fibres, extravasation of red blood cells, haemosiderin deposition, aggregates of foamy histiocytes, cystic change, necrosis, and haemorrhage. Immunohistochemically, the tumour cells were positive for epithelial membrane antigen (four of 13 cases), desmin (six of 13 cases), CD163 (13 of 13 cases), CD68 (seven of 13 cases), oestrogen receptor (13 of 13 cases), progesterone receptor (three of 13 cases), and STAT6 (one of 13 cases, weak nuclear staining), but they were negative for CD34, α-smooth muscle actin, muscle-specific actin, S100, pan-cytokeratin, MDM2, and CDK4. The AHRR–NCOA2 fusion gene was detected in eight cases, and NCOA2 gene rearrangement in nine cases. Conclusion: We revealed the previously unreported histological variation and immunohistochemical findings of AFST, and confirmed them by using genetic methods. The results suggested that AFST should be considered in the diagnosis of fibrous or fibrohistiocytic tumours with the above histological features.

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