1
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Tang Y, Yu JY, Li XH. Clinicopathological features of superficial CD34-positive fibroblastic tumor: A rare case report. Asian J Surg 2024:S1015-9584(24)01941-9. [PMID: 39266350 DOI: 10.1016/j.asjsur.2024.08.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 07/17/2024] [Accepted: 08/28/2024] [Indexed: 09/14/2024] Open
Affiliation(s)
- Yun Tang
- Department of Pathology, The First People's Hospital of Zigong, Sichuan Province, China
| | - Jie-Yuan Yu
- Department of Pathology, The First People's Hospital of Zigong, Sichuan Province, China
| | - Xiao-Hong Li
- Department of Pathology, The First People's Hospital of Zigong, Sichuan Province, China.
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2
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Wakefield CB, Mertens F, Fletcher CDM, Anderson WJ. Clinicopathologic and molecular study of superficial CD34-positive fibroblastic tumours mimicking atypical fibrous histiocytoma (dermatofibroma). Histopathology 2024. [PMID: 39044682 DOI: 10.1111/his.15282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 07/04/2024] [Accepted: 07/05/2024] [Indexed: 07/25/2024]
Abstract
AIMS Superficial CD34-positive fibroblastic tumour (SCD34FT) is an uncommon but distinctive low-grade neoplasm of the skin and subcutis that shows frequent CADM3 expression by immunohistochemistry (IHC). In this study, prompted by an index case resembling 'atypical fibrous histiocytoma (FH)' that was positive for CADM3 IHC, we systematically examined a cohort of tumours previously diagnosed as 'atypical FH' by applying CADM3 and fluorescence in situ hybridization (FISH) for PRDM10 rearrangement, to investigate the overlap between these tumour types. METHODS AND RESULTS Forty cases of atypical FH were retrieved, including CD34-positive tumours (n = 20) and CD34-negative tumours (n = 20). All tumours were stained for CADM3. All CADM3-positive tumours were evaluated by FISH to assess for PRDM10 rearrangement. Eleven CD34-positive tumours (11/20, 55%) coexpressed CADM3 and were reclassified as SCD34FT. None (0/20) of the CD34-negative atypical FH were CADM3-positive. Reclassified SCD34FT (10/11) arose on the lower extremity, with frequent involvement of the thigh (n = 8). Features suggestive of atypical FH were observed in many reclassified cases including variable cellularity, spindled morphology, infiltrative tumour margins, collagen entrapment, epidermal hyperpigmentation, and acanthosis. Variably prominent multinucleate giant cells, including Touton-like forms, were also present. An informative FISH result was obtained in 10/11 reclassified tumours, with 60% (6/10) demonstrating PRDM10 rearrangement. CONCLUSION A significant subset of tumours that histologically resemble atypical FH, and are positive for CD34, coexpress CADM3 and harbour PRDM10 rearrangement, supporting their reclassification as SCD34FT. Awareness of this morphologic overlap and the application of CADM3 IHC can aid the distinction between SCD34FT and atypical FH.
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Affiliation(s)
- Craig B Wakefield
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Fredrik Mertens
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Christopher D M Fletcher
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - William J Anderson
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
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3
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Sun J, Huang S, Yang X. Superficial CD34 + fibroblastic tumor with focal atypical presentation: A case report. Oncol Lett 2024; 28:335. [PMID: 38827569 PMCID: PMC11140230 DOI: 10.3892/ol.2024.14468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 03/05/2024] [Indexed: 06/04/2024] Open
Abstract
Superficial CD34+ fibroblastic tumors (SCPFTs) are rare mesenchymal tumors with distinct morphological features. Although several cases of SCPFT have been reported, a comprehensive understanding of its clinical and biological features necessitates the inclusion of additional cases. The current study presents a case of SCPFT, where morphological observations, immunohistochemical staining and fluorescence in situ hybridization (FISH) were performed. Immunohistochemistry revealed diffuse CD34 expression and integrase interactor 1 expression, whilst FISH indicated rearrangement of the PR/SET domain 10 gene. Microscopic assessment demonstrated typical SCPFT pathology, with a focal nodular region showing a high Ki-67 index, suggesting heterogeneity and the potential for local recurrence. The present study also briefly reviews the differential diagnosis of tumors with morphological similarities. It was found that the precise diagnosis of SCPFT relies on the distinctive pathological features, the use of immunohistochemical markers, including CD34 staining, and the differentiation from similar histological lesions.
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Affiliation(s)
- Juan Sun
- Department of Dermatology, Jinan First People's Hospital, Jinan, Shandong 250014, P.R. China
| | - Shengliang Huang
- Department of Urology, The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Jinan, Shandong 250014, P.R. China
| | - Xiaoqing Yang
- Department of Pathology, The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Jinan, Shandong 250014, P.R. China
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4
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Perret R, Hostein I. Superficial CD34-Positive Fibroblastic Tumor. Surg Pathol Clin 2024; 17:1-12. [PMID: 38278599 DOI: 10.1016/j.path.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2024]
Abstract
Superficial CD34-positive fibroblastic tumor is a mesenchymal neoplasm of "intermediate malignancy" recently included in the fifth edition of the World Health Organization classification of soft tissue and bone tumors. In this review, we summarize the current knowledge on this rare entity with a special focus on its clinicopathological features, morphologic spectrum, and differential diagnosis. We also provide data regarding recent discoveries on its molecular profile and discuss its prognosis and management.
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Affiliation(s)
- Raul Perret
- Department of Biopathology, Institut Bergonié, Comprehensive Cancer Center, Bordeaux F-33000, France.
| | - Isabelle Hostein
- Department of Biopathology, Institut Bergonié, Comprehensive Cancer Center, Bordeaux F-33000, France
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5
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Yim JE, Kwon HM, Kim HR, Shin DH, Choi JS, Choi JH, Bae YK. Superficial CD34-Positive Fibroblastic Tumor: Two Case Reports. Ann Dermatol 2023; 35:S25-S29. [PMID: 37853859 PMCID: PMC10608372 DOI: 10.5021/ad.20.328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 05/12/2021] [Accepted: 05/13/2021] [Indexed: 10/20/2023] Open
Abstract
Superficial CD34-positive fibroblastic tumor (SCPFT) is a recently described disease entity characterized by marked nuclear pleomorphism, low mitotic count, and diffuse CD34 positivity. It is a rare, distinctive, low-grade fibroblastic neoplasm. To date, only 44 cases have been reported in the English-language literature. Herein, we report two cases of SCPFT involving a 48-year-old male and a 22-year-old male with superficial tumors on the right and left thighs, respectively. Excision was performed in both cases. Histologically, both tumors showed spindle-to-epithelioid cells arranged in fascicular or sheet-like patterns. Most cells displayed granular or eosinophilic glassy cytoplasm, marked nuclear pleomorphism, and a low mitotic rate. On immunohistochemical staining, tumor cells were diffusely positive for CD34 and negative for S100 protein, smooth muscle actin, and desmin. After wide excision, neither patient experienced recurrence or metastasis after 16 months and 11 months of clinical follow-up, respectively. To the best of our knowledge, these are the first two cases of SCPFT reported in Korea. We believe these case reports would contribute to the clinicopathological understanding of SCPFT and assist clinicians in differentiating this tumor from other superficial soft tissue neoplasms.
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Affiliation(s)
- Jung Eun Yim
- Department of Dermatology, Yeungnam University College of Medicine, Daegu, Korea
| | - Hyeong Mok Kwon
- Department of Dermatology, Yeungnam University College of Medicine, Daegu, Korea
| | - Hye Ri Kim
- Department of Dermatology, Yeungnam University College of Medicine, Daegu, Korea
| | - Dong Hoon Shin
- Department of Dermatology, Yeungnam University College of Medicine, Daegu, Korea.
| | - Jong Soo Choi
- Department of Dermatology, Yeungnam University College of Medicine, Daegu, Korea
| | - Joon Hyuk Choi
- Department of Pathology, Yeungnam University College of Medicine, Daegu, Korea
| | - Young Kyung Bae
- Department of Pathology, Yeungnam University College of Medicine, Daegu, Korea
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6
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Bruce-Brand C, Conradie W, Schneider JW. Superficial CD34 Positive Fibroblastic Tumour with Myxoid Stroma. Int J Surg Pathol 2022:10668969221126109. [PMID: 36221951 DOI: 10.1177/10668969221126109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Superficial CD34 positive fibroblastic tumor is a rare low-grade neoplasm of the skin and subcutis with indolent behavior. This entity has been included in the current World Health Organisation (WHO) classification of soft tissue tumors. Pathological diagnosis can be challenging due to significant morphological overlap with other entities and the large spectrum of CD34 positive tumors. We report a case in a twenty-five male which showed characteristic diagnostic features, but in addition showed myxoid stroma. The presence of myxoid stroma has not been previously emphasized in this entity and broadens the histologic differential diagnosis significantly to include myxoid soft tissue tumors. A subset of these tumors harbor PRDM10-rearrangements, but a defining molecular feature has not yet been described, highlighting the need for further molecular characterization of this potentially genetically heterogenous tumor. Awareness of this entity among surgeons and pathologists is important to prevent misclassification as an aggressive sarcoma and avoid over-treatment.
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Affiliation(s)
- Cassandra Bruce-Brand
- Consultant Histopathologist, Division of Anatomical Pathology, Faculty of Medicine and Health Sciences, 26697Stellenbosch University / National Health Laboratory Service, Tygerberg Hospital, Cape Town, Western Cape, South Africa
| | - Wilhelmina Conradie
- Consultant Endocrine Surgery, Division of Surgery, Faculty of Medicine and Health Sciences, 98826Stellenbosch University / Tygerberg Hospital, Cape Town, Western Cape, South Africa
| | - Johann W Schneider
- Professor and Head, Division of Anatomical Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University / National Health Laboratory Service Tygerberg Hospital, Matieland, South Africa
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7
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Superficial CD34-Positive Fibroblastic Tumor: A Clinicopathologic, Immunohistochemical, and Molecular Study of 59 Cases. Am J Surg Pathol 2022; 46:1329-1339. [PMID: 35713642 DOI: 10.1097/pas.0000000000001927] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Superficial CD34-positive fibroblastic tumor (SCD34FT) is a rare soft tissue neoplasm that shows overlapping features with PRDM10-rearranged soft tissue tumor (PRDM10-STT). This study characterizes the clinicopathologic, immunohistochemical, and molecular features of SCD34FT in a series of 59 cases. Fluorescence in situ hybridization to assess for PRDM10 rearrangement was performed in 12 tumors. Immunohistochemistry for CADM3 and WT1 was performed; CADM3 was also assessed in histologic mimics. Our cohort of 33 male and 26 female had a median age of 42 (range: 14 to 85) years. Tumors were most commonly located in the lower limb (73%), upper limb (8%), back (7%), and supraclavicular region (3%). The median tumor size was 3.0 cm (range: 1.0 to 9.0 cm). Clinical follow-up in 32 patients (median duration: 26 mo) revealed 2 local recurrences (6%). One patient developed regional lymph node metastases which were completely excised. Microscopically, SCD34FT comprised spindled and pleomorphic cells with glassy cytoplasm and occasional granular cell change. Fluorescence in situ hybridization confirmed PRDM10 rearrangement in 3/8 cases (38%). SCD34FT frequently expressed CADM3 (95%) and WT1 (75%). CADM3 was less diffusely positive in pleomorphic hyalinizing angiectatic tumor (40%), pleomorphic liposarcoma (20%), and undifferentiated pleomorphic sarcoma (10%). We corroborate that SCD34FT is indolent but may rarely metastasize to lymph nodes without adverse outcomes. CADM3 and WT1 may be useful in the distinction from histologic mimics. Since cases of SCD34FT with and without demonstrable PRDM10 rearrangement were clinicopathologically indistinguishable, our study further supports that SCD34FT and PRDM10-STT likely constitute a single entity.
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8
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Puls F, Carter JM, Pillay N, McCulloch TA, Sumathi VP, Rissler P, Fagman H, Hansson M, Amary F, Tirabosco R, Magnusson L, Nilsson J, Flanagan AM, Folpe AL, Mertens F. Overlapping morphological, immunohistochemical and genetic features of superficial CD34-positive fibroblastic tumor and PRDM10-rearranged soft tissue tumor. Mod Pathol 2022; 35:767-776. [PMID: 34969957 DOI: 10.1038/s41379-021-00991-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 11/09/2022]
Abstract
Superficial CD34-positive fibroblastic tumor (SCD34FT) is a recently recognized soft tissue tumor that is considered to be of borderline malignancy. The pathogenesis of this tumor remains incompletely understood, but it has been suggested that SCD34FT overlaps with tumors showing fusions involving the PRDM10 gene. Previous analyses of PRDM10-rearranged tumors have demonstrated that they have a distinct gene expression profile, resulting in high expression of CADM3 (also known as SynCam3), which can be detected immunohistochemically. Here, we investigated a series (n = 43) of SCD34FT or PRDM10-rearranged tumors and potential mimics (n = 226) with regard to morphological, genetic, and immunohistochemical features. The results show that SCD34FT and PRDM10-rearranged tumor are morphologically indistinguishable; 41 of 43 tumors of both entities are CADM3-positive. Hence, we suggest that they constitute a single entity, preferably referred to as SCD34FT. Expression of CADM3 was only rarely seen in other soft tissue tumors, except in tumors with Schwann cell differentiation. Thus, IHC for CADM3, in combination with the characteristic morphological features, is a valuable adjunct in the diagnosis of SCD34FT.
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Affiliation(s)
- Florian Puls
- Department of Clinical Pathology, Sahlgrenska University Hospital, Gothenburg, Sweden. .,Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden.
| | - Jodi M Carter
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Nischalan Pillay
- Department of Cellular and Molecular Pathology, Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK.,Research Department of Pathology, University College London Cancer Institute, London, UK
| | - Thomas A McCulloch
- Department of Cellular Pathology, Nottingham University Hospitals NUH, Nottingham, UK
| | - Vaiyapuri P Sumathi
- Department of Musculoskeletal Pathology, Royal Orthopaedic Hospital NHS Foundation Trust, Birmingham, UK
| | - Pehr Rissler
- Department of Clinical Genetics and Pathology, University and Regional Laboratories, Skåne University Hospital, Lund University, Lund, Sweden
| | - Henrik Fagman
- Department of Clinical Pathology, Sahlgrenska University Hospital, Gothenburg, Sweden.,Institute of Biomedicine, University of Gothenburg, Gothenburg, Sweden
| | - Magnus Hansson
- Department of Clinical Pathology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Fernanda Amary
- Department of Cellular and Molecular Pathology, Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK
| | - Roberto Tirabosco
- Department of Cellular and Molecular Pathology, Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK
| | - Linda Magnusson
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | - Jenny Nilsson
- Department of Clinical Genetics, Lund University, Lund, Sweden
| | - Adrienne M Flanagan
- Department of Cellular and Molecular Pathology, Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK.,Research Department of Pathology, University College London Cancer Institute, London, UK
| | - Andrew L Folpe
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Fredrik Mertens
- Department of Clinical Genetics and Pathology, University and Regional Laboratories, Skåne University Hospital, Lund University, Lund, Sweden.,Department of Clinical Genetics, Lund University, Lund, Sweden
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9
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Salah HT, D'ardis JA, Baek D, Schwartz MR, Ayala AG, Ro JY. Superficial CD34-positive fibroblastic tumor (SCPFT): A review of pathological and clinical features. Ann Diagn Pathol 2022; 58:151937. [PMID: 35344860 DOI: 10.1016/j.anndiagpath.2022.151937] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/07/2022] [Accepted: 03/15/2022] [Indexed: 11/01/2022]
Abstract
Superficial CD34-positive fibroblastic tumor (SCPFT) is a recently described rare mesenchymal tumor of borderline malignancy. It generally involves superficial soft tissue, with a predilection to the lower extremities. Microscopically this tumor is characterized by a fascicular and storiform growth pattern, spindled to epithelioid cells, nuclear atypia with pleomorphism, and eosinophilic granular, and fibrillar to glassy cytoplasm. Strong diffuse immunoreactivity for CD34 is very characteristic of this entity. Due to under-recognition, this tumor is generally underreported. Additionally, cases of recurrence are rarely reported in the literature. We will comprehensively review the English language literature on all reported cases of SCPFT, with emphasis on recurrence.
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Affiliation(s)
- Haneen T Salah
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, United States of America
| | - Julieta A D'ardis
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, United States of America
| | - Donghwa Baek
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, United States of America
| | - Mary R Schwartz
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Houston, TX, United States of America
| | - Alberto G Ayala
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Weill Medical College of Cornell University, Houston, TX, United States of America
| | - Jae Y Ro
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Weill Medical College of Cornell University, Houston, TX, United States of America.
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10
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Li SY, Zhang HL, Bai YZ. Superficial CD34-Positive Fibroblastic Tumor on the Chest Wall of an 8-Year-Old Girl: A Case Report and Literature Review. Pediatr Hematol Oncol 2021; 38:602-608. [PMID: 33792506 DOI: 10.1080/08880018.2020.1859659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This study reports a case of superficial CD34-positive fibroblastic tumor (SCPFT) in a child and analyze the major known clinicopathological features of SCPFT and other skin mesenchymal tumors, contributing to an accurate diagnosis of this rare disease. We summarize the clinicopathologic features of an 8-year-old girl who was diagnosed with SCPFT and 46 previously reported SCPFT cases. Post-operative histopathologic examination of the current case showed the tumor lesion was well-circumscribed; tumor cells were spindled-to-polygonal with a fascicular pattern; most nuclei displayed hyperchromasia and low mitotic rate; intranuclear pseudoinclusions could be found; and abundant eosinophilic cytoplasm and partial myxoid stroma were observed. Immunohistochemistry revealed strong and diffuse CD34-positivity, vimentin staining positively but no S-100, SMA, NSE, CD31, desmin, cytokeratin, STAT6, β-catenin, MDM2, or ERG expression. The Ki-67 and CD68 labeling indexes were approximately 1%. There were no rearrangements of PDGFB or PRDM10 tested by FISH. After surgical resection, the patient had no signs of recurrence or metastasis at a 6-month follow-up. The present case is the first that describes SCPFT in children and has significant clinical implications. SCPFT should be differentiated from other skin mesenchymal tumors. The presented compilation of all so far published SCPFT cases will help in diagnosing successfully SCPFT and increasing awareness of this tumor to guide clinical practice.
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Affiliation(s)
- Si Ying Li
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Hai Lan Zhang
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
| | - Yu Zuo Bai
- Department of Pediatric Surgery, Shengjing Hospital of China Medical University, Shenyang, Liaoning Province, China
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11
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Perret R, Michal M, Carr RA, Velasco V, Švajdler M, Karanian M, Meurgey A, Paindavoine S, Soubeyran I, Coindre JM, Boidot R, Charon-Barra C, Geneste D, Weingertner N, Pissaloux D, Tirode F, Baud J, Le Loarer F. Superficial CD34-Positive Fibroblastic Tumor and PRDM10-rearranged Soft Tissue tumor are overlapping entities: a comprehensive study of 20 cases. Histopathology 2021; 79:810-825. [PMID: 34121219 DOI: 10.1111/his.14429] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 05/13/2021] [Accepted: 06/10/2021] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Superficial CD34-Positive Fibroblastic Tumor (SCD34FT) and PRDM10-rearranged soft tissue Tumor (PRDM10-STT) are rare mesenchymal tumors. These lesions have clinicopathological similarities, but their relationship remains controversial. This study aimed to characterize a series of cases of SCD34FT and PRDM10-STT. METHODS AND RESULTS ten lesions each of SCD34FT and PRDM10-STT were studied using immunohistochemistry, Array-Comparative genomic hybridization (aCGH), RNA-Sequencing and exome sequencing. Tumors mainly occurred in young adults, were generally small (<5 cm), and arose predominantly in the superficial soft tissues of the lower extremities. Follow-up data were available in 15 cases (SCD34FT, n= 7, median 16 months; PRDM10-STT, n= 8, median 14 months), local recurrences occurred in 4 cases (SCD34FT, 2/10; PRDM10-STT, 2/10) while no distant spread was documented. Morphologically, tumors were relatively well-circumscribed and composed of sheets and fascicles of spindle and pleomorphic cells showing low mitotic activity (<1/mm²) without necrosis. Other findings included: granular cell change, lipoblast-like cells, ectatic blood vessels with fibrinous material, myxoid stromal changes, metaplastic bone, and increased mitotic activity (>1/mm²). All tumors diffusely expressed CD34, while Pan-Keratin and Desmin were commonly seen focally. SynCAM3 was diffusely expressed in 12 cases (SCD34FT, n= 5; PRDM10-STT, n= 7), independently of fusion status. aCGH profiles were "flat" (PRDM10-STT, n=4; SCD34FT, n=2) and exome sequencing showed no recurrent pathogenic mutations (PRDM10-STT, n=2; SCD34FT, n=4). Overall, the only morphological features seen exclusively in PRDM10-STT were myxoid stromal changes (3/10) and metaplastic bone (2/10). CONCLUSION we expand the current knowledge on PRDM10-STT and SCD34FT and provide additional evidence for considering them as overlapping entities.
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Affiliation(s)
- Raul Perret
- Department of Biopathology, Institut Bergonie, Bordeaux, France
| | - Michael Michal
- Department of Pathology, Charles University, Faculty of Medicine, Plzen, Czech Republic.,Department of Pathology and Molecular Genetics, Bioptical Laboratory, Ltd, Plzen, Czech Republic
| | - Richard A Carr
- Department of Pathology, Warwick Hospital, Warwick, United Kingdom
| | - Valérie Velasco
- Department of Biopathology, Institut Bergonie, Bordeaux, France
| | - Marian Švajdler
- Department of Pathology, Charles University, Faculty of Medicine, Plzen, Czech Republic.,Department of Pathology and Molecular Genetics, Bioptical Laboratory, Ltd, Plzen, Czech Republic
| | - Marie Karanian
- Department of Biopathology, Centre Leon Berard, Lyon, France.,Univ Lyon, Claude Bernard Lyon 1 University, CNRS 5286, INSERM U1052, Cancer Research Center of Lyon, Centre Leon Berard, F-69008, Lyon, France
| | | | | | | | - Jean-Michel Coindre
- Department of Biopathology, Institut Bergonie, Bordeaux, France.,University of Bordeaux, Talence, France
| | - Romain Boidot
- Department of Tumor Biology and Pathology, Molecular Biology Unit, Centre Georges-François Leclerc, Dijon, France
| | - Céline Charon-Barra
- Department of Tumor Biology and Pathology, Pathology Unit, Centre Georges-François Leclerc, Dijon, France
| | - Damien Geneste
- Department of Bioinformatics, Institut Bergonié, Bordeaux, France
| | - Noelle Weingertner
- Department of Pathology, Strasbourg Regional University Hospital (Hautepierre Hospital), Strasbourg, France
| | - Daniel Pissaloux
- Department of Biopathology, Centre Leon Berard, Lyon, France.,Univ Lyon, Claude Bernard Lyon 1 University, CNRS 5286, INSERM U1052, Cancer Research Center of Lyon, Centre Leon Berard, F-69008, Lyon, France
| | - Franck Tirode
- Univ Lyon, Claude Bernard Lyon 1 University, CNRS 5286, INSERM U1052, Cancer Research Center of Lyon, Centre Leon Berard, F-69008, Lyon, France
| | - Jessica Baud
- University of Bordeaux, Talence, France.,INSERM U1218, ACTION Unit, Bordeaux, France
| | - François Le Loarer
- Department of Biopathology, Institut Bergonie, Bordeaux, France.,University of Bordeaux, Talence, France.,INSERM U1218, ACTION Unit, Bordeaux, France
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12
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Abstract
This article focuses on various recently described or emerging cutaneous soft tissue neoplasms. These entities encompass a wide range of clinical and histologic characteristics. Emphasis is placed on their distinguishing morphologic and immunophenotypic features compared with entities that enter into their differential diagnosis, as well as novel immunophenotypic and molecular tests that are often necessary for accurate diagnosis of these entities. Entities discussed include EWSR1-SMAD3-rearranged fibroblastic tumor, superficial CD34-positive fibroblastic tumor, epithelioid fibrous histiocytoma, CIC-rearranged sarcomas, and NTRK-rearranged spindle cell tumors.
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Affiliation(s)
- Josephine K Dermawan
- Soft Tissue and Bone Pathology Section, Department of Pathology, Cleveland Clinic, 9500 Euclid Avenue, L25, Cleveland, OH 44195, USA
| | - Jennifer S Ko
- Dermatopathology Section, Department of Pathology, Cleveland Clinic, 9500 Euclid Avenue, L25, Cleveland, OH 44195, USA
| | - Steven D Billings
- Dermatopathology Section, Department of Pathology, Cleveland Clinic, 9500 Euclid Avenue, L25, Cleveland, OH 44195, USA.
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13
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Ding L, Xu WJ, Tao XY, Zhang L, Cai ZG. Clinicopathological features of superficial CD34-positive fibroblastic tumor. World J Clin Cases 2021; 9:2739-2750. [PMID: 33969057 PMCID: PMC8058686 DOI: 10.12998/wjcc.v9.i12.2739] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/13/2021] [Accepted: 02/25/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Superficial CD34-positive fibroblastoma (SCPFT) is a newly discovered mesenchymal tumor characterized by high polymorphism, low mitotic rate, and diffuse CD34-positive reactions.
AIM To further determine the clinicopathological features of SCPFT.
METHODS We retrospectively analyzed the clinicopathological data, immunohistochemistry results, and differential diagnoses of four patients with SCPFT and performed a literature review. Relevant fusion genes were also detected.
RESULTS The tumors were all located in the lower extremities and presented as slow-growing painless masses located in the dermis and subcutaneous tissue. Microscopically, the tumors were composed of spindle-shaped to epithelioid cells with scattered abnormal and pleomorphic nuclei on a fibrous or fibromyxoid background. Necrosis was not found in the tumor tissues, and mitotic figures were rare. Immunohistochemically, the tumor cells were strongly positive for vimentin and CD34, and CKpan showed focal positivity in two tumors. All four patients were followed (13-57 mo, mean 35 mo), and one patient experienced local recurrence.
CONCLUSION SCPFT is a newly discovered borderline mesenchymal tumor that can locally recur or even metastasize. Familiarity with its clinicopathological features will help avoid confusion with skin mesenchymal tumors with similar features.
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Affiliation(s)
- Li Ding
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, Anhui Province, China
| | - Wen-Jing Xu
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, Anhui Province, China
| | - Xiao-Ying Tao
- Department of Pathology, Hangzhou People's Hospital, Hangzhou 310000, Zhejiang Province, China
| | - Liang Zhang
- Department of Pathology, Huaiyuan County People's Hospital, Bengbu 233000, Anhui Province, China
| | - Zhao-Gen Cai
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, Anhui Province, China
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Bai LP, Lv JX, Kong LW, Cao HY, Jin Y. Application of modified closed biopsy in rabbit model of VX2-transplanted bone tumor. J Orthop Surg Res 2021; 16:204. [PMID: 33743772 PMCID: PMC7980360 DOI: 10.1186/s13018-021-02333-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 03/02/2021] [Indexed: 11/10/2022] Open
Abstract
Background This study was aimed to explore the application value of modified closed biopsy technique in puncture biopsy of rabbit VX2 transplanted bone tumor model. Methods VX2 tumor was transplanted into the bilateral tibia of 30 rabbits through the tibial plateau to make the model of VX2 transplanted bone tumor. Seven days after modeling, the proximal tibia biopsy was performed under the guidance of X-ray, and the biopsy specimen was examined pathologically. The left leg was biopsied with modified closed biopsy technique (experimental group), and the right leg was biopsied with hollow needle (control group). After 14 days of modeling, all rabbits were killed after X-ray examination around the puncture hole, and the soft tissue around the puncture hole was taken for pathological examination, and the expression levels of PCNA and CD34 in the tissue extract were detected by enzyme-linked immunosorbent assay (ELISA). Results By the end of the experiment, a total of 3 rabbits died, and finally, 27 rabbits were included in the study. Tumor cells were detected in all the intramedullary specimens obtained by puncture biopsy. On the 14th day after modeling, X-ray showed that the occurrence rate of periosteal reaction and extraosseous high-density shadow around the puncture hole was 14.81% (4/27) in the experimental group and 40.74% (11/27) in the control group. The difference was statistically significant (P<0.05). The pathological results of soft tissue around the puncture hole showed that the tumor cell metastasis rate was 29.63% (8/27) in the experimental group and 100% (27/27) in the control group, and the difference was statistically significant (P<0.05). The expression levels of PCNA and CD34 in the experimental group were lower than those in the control group (P < 0.05). Conclusion Both the modified closed biopsy technique and needle aspiration biopsy can provide sufficient biopsy tissue for the diagnosis of VX2-transplanted bone tumor in rabbits. At the same time, the improved closed biopsy technique has a certain application value in preventing local metastasis of tumor cells along the puncture channel.
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Affiliation(s)
- Lei Peng Bai
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China
| | - Jia Xing Lv
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China
| | - Ling Wei Kong
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China
| | - Hai Ying Cao
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China
| | - Yu Jin
- Department of Orthopaedics, Affiliated Hospital of Chengde Medical College, 36 Nanyingzi Street, Chengde, Hebei, 067000, People's Republic of China.
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