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Monteagudo C, Fúnez R, Sánchez-Sendra B, González-Muñoz JF, Nieto G, Alfaro-Cervelló C, Murgui A, Barr RJ. Cutaneous Lymphadenoma Is a Distinct Trichoblastoma-like Lymphoepithelial Tumor With Diffuse Androgen Receptor Immunoreactivity, Notch1 Ligand in Reed-Sternberg-like Cells, and Common EGFR Somatic Mutations. Am J Surg Pathol 2021; 45:1382-1390. [PMID: 34232601 PMCID: PMC8428866 DOI: 10.1097/pas.0000000000001727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The term "cutaneous lymphadenoma" was coined in this journal for an unusual lymphoepithelial cutaneous adnexal neoplasm, possibly with immature pilosebaceous differentiation. Some authors further proposed that cutaneous lymphadenoma was an adamantinoid trichoblastoma. However, although a hair follicle differentiation is widely accepted, the fact that this is a lymphoepithelial tumor is not appropriately explained by the trichoblastoma hypothesis. Our goal was to further clarify the phenotypic and genotypic features of cutaneous lymphadenoma in a series of 11 cases. Histologically, a lobular architecture surrounded by a dense fibrous stroma was present in all cases. The lobules were composed of epithelial cells admixtured with small lymphocytes and isolated or clustered large Reed-Sternberg-like (RS-L) cells. The epithelial cells were diffusely positive for the hair follicle stem cell markers CK15, PHLDA1, and for androgen receptor. No immunostaining for markers of sebaceous differentiation was found. Intraepithelial lymphocytes were predominantly CD3+, CD4+, FoxP3+ T cells. RS-L cells showed both strong Jagged-1 and Notch1 cytoplasmic immunostaining. Androgen-regulated NKX3.1 nuclear immunostaining was present in a subset of large intralobular cells in all cases. Double immunostaining showed coexpression of NKX3.1 and CD30 in a subset of RS-L cells. No immunostaining for lymphocytic or epithelial markers was present in RS-L cells. EGFR, PIK3CA, and FGFR3 somatic mutations were found by next-generation sequencing in 56% of the cases. We consider that cutaneous lymphadenoma is a distinct benign lymphoepithelial tumor with androgen receptor and hair follicle bulge stem cell marker expression, RS-L cell-derived Notch1 ligand, and common EGFR gene mutations.
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Affiliation(s)
- Carlos Monteagudo
- Department of Pathology, University Clinic Hospital, INCLIVA Biomedical Research Institute
- Departments of Pathology
| | - Rafael Fúnez
- Department of Pathology, Costa del Sol Health Agency, Málaga, Spain
| | | | - José F. González-Muñoz
- Department of Pathology, University Clinic Hospital, INCLIVA Biomedical Research Institute
| | | | - Clara Alfaro-Cervelló
- Department of Pathology, University Clinic Hospital, INCLIVA Biomedical Research Institute
| | - Amelia Murgui
- Biochemistry and Molecular Biology, University of Valencia, Valencia
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Moya-Martínez C, Torre-Castro J, Mendoza-Cembranos D, Santonja C, Requena L. Microcystic adnexal carcinoma with germinative follicular differentiation. J Cutan Pathol 2020; 48:123-127. [PMID: 32895957 DOI: 10.1111/cup.13869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/27/2020] [Accepted: 09/01/2020] [Indexed: 11/26/2022]
Abstract
Microcystic adnexal carcinoma (MAC) is a low-grade adnexal carcinoma with controversial lines of differentiation. We present here an example of MAC showing histopathologic findings of germinative follicular differentiation in the form of solid aggregates of trichoblastoma intermingled with neoplastic aggregates of MAC. Immunohistochemical findings, showing positivity for PHLDA1 and negativity for BerEp4 in neoplastic aggregates of trichoblastoma, also supported a germinative follicular differentiation. Follicular differentiation in MAC supports an apocrine line of differentiation for this neoplasm.
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Affiliation(s)
| | - Juan Torre-Castro
- Dermatology Department, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain
| | | | - Carlos Santonja
- Pathology Department, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain
| | - Luis Requena
- Dermatology Department, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain
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Dika E, Scarfì F, Ferracin M, Broseghini E, Marcelli E, Bortolani B, Campione E, Riefolo M, Ricci C, Lambertini M. Basal Cell Carcinoma: A Comprehensive Review. Int J Mol Sci 2020; 21:ijms21155572. [PMID: 32759706 PMCID: PMC7432343 DOI: 10.3390/ijms21155572] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/28/2020] [Accepted: 08/03/2020] [Indexed: 12/25/2022] Open
Abstract
Basal cell carcinoma (BCC) is the most common type of carcinoma worldwide. BCC development is the result of a complex interaction between environmental, phenotypic and genetic factors. However, despite the progress in the field, BCC biology and mechanisms of resistance against systemic treatments have been poorly investigated. The aim of the present review is to provide a revision of BCC histological and molecular features, including microRNA (miRNA) dysregulation, with a specific focus on the molecular basis of BCC systemic therapies. Papers from the last ten years regarding BCC genetic and phenotypic alterations, as well as the mechanism of resistance against hedgehog pathway inhibitors vismodegib and sonidegib were included. The involvement of miRNAs in BCC resistance to systemic therapies is emerging as a new field of knowledge.
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Affiliation(s)
- Emi Dika
- Division of Dermatology, Azienda Ospedaliero-Universitaria di Bologna, via Massarenti 9, 40138 Bologna, Italia; (F.S.); (M.L.)
- Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy
- Correspondence: ; Tel.: +39-0512144849
| | - Federica Scarfì
- Division of Dermatology, Azienda Ospedaliero-Universitaria di Bologna, via Massarenti 9, 40138 Bologna, Italia; (F.S.); (M.L.)
- Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy
| | - Manuela Ferracin
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy; (M.F.); (E.B.); (M.R.)
| | - Elisabetta Broseghini
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy; (M.F.); (E.B.); (M.R.)
| | - Emanuela Marcelli
- Laboratory of Bioengineering, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy; (E.M.); (B.B.)
| | - Barbara Bortolani
- Laboratory of Bioengineering, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy; (E.M.); (B.B.)
| | - Elena Campione
- Dermatology Clinic, University of Rome Tor Vergata Rome, 00133 Rome, Italy;
| | - Mattia Riefolo
- Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy; (M.F.); (E.B.); (M.R.)
| | | | - Martina Lambertini
- Division of Dermatology, Azienda Ospedaliero-Universitaria di Bologna, via Massarenti 9, 40138 Bologna, Italia; (F.S.); (M.L.)
- Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine (DIMES), University of Bologna, 40138 Bologna, Italy
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Flordelis JO, Shen YC, Wu YH. Basaloid tumors arising from seborrheic keratosis: Malignant basal cell carcinoma or benign basaloid follicular hamartomatous proliferation? J Cutan Pathol 2019; 47:207-218. [PMID: 31682281 DOI: 10.1111/cup.13607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 10/22/2019] [Accepted: 10/28/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Basaloid tumors arising from seborrheic keratosis (SK) that resembled basal cell carcinoma (BCC) were infrequently observed in our patients. They also exhibited morphologic features similar to those of trichoblastoma or basaloid follicular hamartoma. METHODS We retrospectively collected cases of SK with basaloid tumors from 2001 to 2017. Ten cases of BCC, five of nevus sebaceus with trichoblastoma, five of trichoblastoma, and five of trichoepithelioma were included as controls. Tumor-associated antigens Bcl-2, CD10, PHLDA1, and CK20 were tested. Antigenic markers CD34 and CD10 were used to analyze peritumoral stroma features and Ki-67 and pHH3 to measure the mitotic activity. RESULTS Ten cases of SK with basaloid tumors were found and all located in non-sun-exposed areas, including five men and five women, with a mean age of 61 years. A distinct PHLDA1 staining was not observed. The staining patterns of basaloid tumor lobules associated with SK were similar to the benign control group. Bcl-2 staining in the tumor lobules was mostly negative. Peritumoral CD10 stain and CK20-positive Merkel cells in the lobules were observed and the mitotic counts were low. CONCLUSION Basaloid tumors arising from SK are not always BCC. They were all benign follicular hamartomatous proliferation in this case series.
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Affiliation(s)
- Johanna O Flordelis
- Department of Dermatology, Research Institute for Tropical Medicine, Metro Manila, Philippines
| | - Ying-Chi Shen
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Yu-Hung Wu
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.,Department of Dermatology, Mackay Memorial Hospital, Taipei, Taiwan
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5
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Cuenca-Barrales C, Ruiz-Carrascosa J, Ruiz-Villaverde R. Fibroepithelioma of Pinkus: A Basal Cell Carcinoma With Distinctive Dermoscopic Features. ACTAS DERMO-SIFILIOGRAFICAS 2018. [DOI: 10.1016/j.adengl.2018.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Pollard WL, Grenier LS, Kobayashi TT. Novel Presentation of Fibroepithelioma of Pinkus on the Ear of a Patient Treated on a Panamanian Humanitarian Mission. Mil Med 2018; 183:e751-e753. [PMID: 29425357 DOI: 10.1093/milmed/usx225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 12/23/2017] [Indexed: 11/14/2022] Open
Abstract
Fibroepithelioma of Pinkus (FEP) is traditionally classified as an unusual variant of basal cell carcinoma. It has non-specific clinical findings yet distinct histologic features. The diagnosis can be challenging for clinicians because it often mimics benign entities such as intradermal nevi. FEP typically occurs on the trunk, but many body sites can be involved including the head, neck, and genitalia. According to a PubMed search of articles indexed in MEDLINE using "Fibroepithelioma of Pinkus" and "ear" or "auricle," there are no reports of FEP specifically occurring on the ear. We describe the first case of FEP on the ear of a heavily sun-damaged male treated while on a military humanitarian mission to Panama. This case helps support the classification of FEP as a basal cell carcinoma variant and raises awareness for this entity as it may be encountered both on military humanitarian missions and in military clinics.
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Affiliation(s)
- Whitney L Pollard
- Department of Dermatology, San Antonio Uniformed Services Health Education Consortium, 1100 Wilford Hall Loop Bldg 4554, JBSA, Lackland, TX
| | - Liesl S Grenier
- Department of Dermatology, Carl R. Darnall Army Medical Center, 36065 Santa Fe Ave, Fort Hood, TX
| | - Todd T Kobayashi
- Department of Dermatology, San Antonio Uniformed Services Health Education Consortium, 1100 Wilford Hall Loop Bldg 4554, JBSA, Lackland, TX
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7
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Flordelis JO, Wu YH, Chen HC. Fibroepithelioma of Pinkus in a 6-year-old boy: a case report. Int J Dermatol 2018; 58:1085-1087. [PMID: 30264493 DOI: 10.1111/ijd.14257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 07/16/2018] [Accepted: 09/09/2018] [Indexed: 11/26/2022]
Affiliation(s)
- Johanna O Flordelis
- Department of Dermatology, Research Institute for Tropical Medicine, Metro Manila, Philippines.,Department of Dermatology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Yu-Hung Wu
- Department of Dermatology, Mackay Memorial Hospital, Taipei, Taiwan.,Department of Medicine, Mackay Medical College, New Taipei City, Taiwan
| | - Hsiu-Chin Chen
- Department of Dermatology, Mackay Memorial Hospital, Taipei, Taiwan
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8
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Cuenca-Barrales C, Ruiz-Carrascosa JC, Ruiz-Villaverde R. Fibroepithelioma of Pinkus: A Basal Cell Carcinoma With Distinctive Dermoscopic Features. ACTAS DERMO-SIFILIOGRAFICAS 2018; 109:908-909. [PMID: 30119825 DOI: 10.1016/j.ad.2018.01.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 12/14/2017] [Accepted: 01/06/2018] [Indexed: 11/18/2022] Open
Affiliation(s)
- C Cuenca-Barrales
- Unidad de Dermatología Médico-Quirúrgica y Venereología, Hospital Universitario Campus de la Salud de Granada, Granada, España
| | - J C Ruiz-Carrascosa
- Unidad de Dermatología Médico-Quirúrgica y Venereología, Hospital Universitario Campus de la Salud de Granada, Granada, España
| | - R Ruiz-Villaverde
- Unidad de Dermatología Médico-Quirúrgica y Venereología, Hospital Universitario Campus de la Salud de Granada, Granada, España.
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Kneitz H, Fetzer S, Goebeler M, Bröcker EB. Differential diagnostic significance of epithelial and stromal CD10 expression in tumors of trichogenic origin. J Dtsch Dermatol Ges 2018; 16:719-728. [PMID: 29873924 DOI: 10.1111/ddg.13547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 12/01/2017] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVES The histological differential diagnosis between benign trichogenic skin tumors and basal cell carcinoma may be challenging. We therefore set out to investigate whether expression of CD10, a cell surface protein with neutral endopeptidase activity, might be a suitable marker for the histological differential diagnosis of trichogenic skin tumors. PATIENTS AND METHODS We immunohistochemically analyzed 119 cases of benign trichogenic skin tumors and basal cell carcinoma. These included 28 nodular and 15 sclerosing basal cell carcinomas, 21 Pinkus tumors, 20 trichoblastomas, nine trichofolliculomas, eleven trichoepitheliomas, five desmoplastic trichoepitheliomas, and ten seborrheic keratoses. RESULTS The majority of nodular basal cell carcinomas expressed CD10 in tumor cells at the peripheral (22/28 [75 %]). On the other hand, trichoblastomas revealed peripheral CD10 expression in only 10 % (2/20) of cases, whereas 50 % showed central expression (10/20). Peripheral epithelial expression of CD10 was also found in Pinkus tumors (9/21 [42.9 %]) and trichoepithelioma (4/11 [36.4 %]). Desmoplastic trichoepithelioma showed no tumoral CD10 expression at all (0/5 [0 %]), while the majority of sclerosing basal cell carcinomas was positive for CD10 (13/15 [86.7 %]). CONCLUSIONS Our findings suggest that epithelial expression of CD10 - and not peritumoral stromal CD10 expression, as has been postulated - may well be of differential diagnostic significance. The pattern of distribution of CD10-positive neoplastic cells in particular can be useful in the diagnosis of trichogenic tumors.
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Affiliation(s)
- Hermann Kneitz
- Department of Dermatology, Venereology and Allergology, University Medical Center, Würzburg, Germany
| | - Stefanie Fetzer
- Department of Dermatology, Venereology and Allergology, University Medical Center, Würzburg, Germany
| | - Matthias Goebeler
- Department of Dermatology, Venereology and Allergology, University Medical Center, Würzburg, Germany
| | - Eva-Bettina Bröcker
- Department of Dermatology, Venereology and Allergology, University Medical Center, Würzburg, Germany
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Kneitz H, Fetzer S, Goebeler M, Bröcker EB. Differenzialdiagnostische Bedeutung epithelialer und stromaler CD10-Expression in Tumoren trichogenen Ursprungs. J Dtsch Dermatol Ges 2018; 16:719-729. [DOI: 10.1111/ddg.13547_g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 12/01/2017] [Indexed: 11/28/2022]
Affiliation(s)
- Hermann Kneitz
- Klinik für Dermatologie; Venerologie und Allergologie; Universitätsklinikum Würzburg
| | - Stefanie Fetzer
- Klinik für Dermatologie; Venerologie und Allergologie; Universitätsklinikum Würzburg
| | - Matthias Goebeler
- Klinik für Dermatologie; Venerologie und Allergologie; Universitätsklinikum Würzburg
| | - Eva-Bettina Bröcker
- Klinik für Dermatologie; Venerologie und Allergologie; Universitätsklinikum Würzburg
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Huet P, Barnéon G, Cribier B. Tumeur fibroépithéliale de Pinkus : corrélation dermatopathologie-dermatoscopie. Ann Dermatol Venereol 2017; 144:818-822. [DOI: 10.1016/j.annder.2017.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
CONTEXT - Basal cell carcinoma (BCC) is the most common human malignant neoplasm and is a frequently encountered diagnosis in dermatopathology. Although BCC may be locally destructive, it rarely metastasizes. Many diagnostic entities display morphologic and immunophenotypic overlap with BCC, including nonneoplastic processes, such as follicular induction over dermatofibroma; benign follicular tumors, such as trichoblastoma, trichoepithelioma, or basaloid follicular hamartoma; and malignant tumors, such as sebaceous carcinoma or Merkel cell carcinoma. Thus, misdiagnosis has significant potential to result in overtreatment or undertreatment. OBJECTIVE - To review key features distinguishing BCC from histologic mimics, including current evidence regarding immunohistochemical markers useful for that distinction. DATA SOURCES - Review of pertinent literature on BCC immunohistochemistry and differential diagnosis. CONCLUSIONS - In most cases, BCC can be reliably diagnosed by histopathologic features. Immunohistochemistry may provide useful ancillary data in certain cases. Awareness of potential mimics is critical to avoid misdiagnosis and resulting inappropriate management.
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Affiliation(s)
- Lauren M Stanoszek
- From the Departments of Pathology (Drs Stanoszek, Wang, and Harms) and Dermatology (Dr Harms), University of Michigan Medical School, Ann Arbor. Drs Stanoszek and Wang contributed equally
| | - Grace Y Wang
- From the Departments of Pathology (Drs Stanoszek, Wang, and Harms) and Dermatology (Dr Harms), University of Michigan Medical School, Ann Arbor. Drs Stanoszek and Wang contributed equally
| | - Paul W Harms
- From the Departments of Pathology (Drs Stanoszek, Wang, and Harms) and Dermatology (Dr Harms), University of Michigan Medical School, Ann Arbor. Drs Stanoszek and Wang contributed equally
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Mihai MM, Voicu C, Lupu M, Koleva N, Patterson JW, Lotti T, Lotti J, França K, Batashki A, Bakardzhiev I, Wollina U, Tchernev G. Fibroepithelioma of Pinkus (FeP) Located in the Left Lower Quadrant of the Abdomen - Case Report and Review of the Literature. Open Access Maced J Med Sci 2017; 5:439-444. [PMID: 28785327 PMCID: PMC5535652 DOI: 10.3889/oamjms.2017.079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Revised: 04/22/2017] [Accepted: 04/23/2017] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Fibroepithelioma of Pinkus (FeP) is an uncommon and controversial skin lesion, sharing features of both basal cell carcinoma (BCC) and trichoepithelioma. In this article, we present a case of FeP and synthesise current concepts on the etiopathogenesis, diagnosis and treatment of this uncommon tumour. CASE REPORT We report the case of an 88-year-old male patient presenting to the dermatology clinic for a sharply demarcated, pink, exophytic cutaneous tumour situated in the left inguinal region. The histopathological examination performed after complete surgical excision of the lesion revealed a diagnosis of FeP. A systematic review of the literature was conducted. The terms `fibroepithelioma` and `Pinkus` have been searched in bibliographical databases, including PubMed and Google Scholar, without time limitation up to February 15th, 2017. Seventy-nine articles that fulfilled all the required conditions were identified. Relevant citations and additional articles identified from references have been assessed. The systematic review included a total number of 452 cases of FeP. CONCLUSION Even though FeP is considered a relatively rare tumour, its true incidence rate might be higher than previously believed. The clinical aspects of the lesion described in this paper and its location in the left lower quadrant of the abdomen are classic features of FeP. Histopathologic examination revealed features of both BCC and trichoepithelioma. Further epidemiological studies are required to clarify whether patients with FEP should be screened for the occurrence of other malignancies.
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Affiliation(s)
- Mara Madalina Mihai
- Oncologic Dermatology and Allergology Department, "Carol Davila" University of Medicine and Pharmacy; 17 Marasti Blvd, Bucharest, Romania
| | - Cristiana Voicu
- Dermatology Department, Polisano Clinic, 26Z Timisoara Blvd, Bucharest, Romania
| | - Mihai Lupu
- Dermatology Department, Medas Medical Centre,41 Nicolae Grigorescu Blvd, Bucharest, Romania
| | - Nely Koleva
- Medical Institute of Ministry of Interior (MVR), Department of Dermatology and Dermatologic Surgery, General Skobelev 79, 1606 Sofia, Bulgaria
| | - James W Patterson
- University of Virginia Health System, 1215 Lee Street, Box 800214, Charlottesville, VA 22908, USA
| | - Torello Lotti
- University of Rome "G. Marconi", Rome, Italy; Department of Biotechnology, Delft University of Technology, 2628 BC, Delft, The Netherlands
| | - Jacopo Lotti
- Department of Nuclear, Subnuclear and Radiation Physics, University of Rome "G. Marconi", Rome, Italy
| | - Katlein França
- Institute for Bioethics & Health Policy; Department of Dermatology & Cutaneous Surgery; Department of Psychiatry & Behavioral Sciences, University of Miami Miller School of Medicine - Miami, FL, USA
| | - Atanas Batashki
- Specialist in Abdominal and Thoracic Surgery, Department of special Surgery, Medical University of Plovdiv, bul. "Peshtersko shose" Nr 66, 4000, Plovdiv, Bulgaria
| | - Ilko Bakardzhiev
- Medical College, Medical University of Varna, Varna 9000, Bulgaria
| | - Uwe Wollina
- Department of Dermatology and Allergology, Academic Friedrichstrasse 41, 01067, Dresden, Germany
| | - Georgi Tchernev
- Medical Institute of Ministry of Interior (MVR), Department of Dermatology and Dermatologic Surgery, General Skobelev 79, 1606 Sofia, Bulgaria; Onkoderma - Policlinic for Dermatology, Venereology and Dermatologic Surgery, 26 General Skobelev blvd., Sofia, Bulgaria
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Histopathologic pitfalls of Mohs micrographic surgery and a review of tumor histology. Wien Med Wochenschr 2016; 168:218-227. [PMID: 27832425 DOI: 10.1007/s10354-016-0528-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 10/18/2016] [Indexed: 01/15/2023]
Abstract
Mohs micrographic surgery is a specialized subset of staged surgical excisions with each subsequent stage being driven largely by the histologic findings of the previous stage. Therefore, it is imperative that histologic analysis is performed in an accurate manner. Frozen section and tissue flattening is a crucial step in Mohs surgery. Frozen sections introduce certain artifacts and these artifacts must be interpreted in the correct context. Basal and squamous cell carcinomas are the most common tumors encountered in Mohs micrographic surgery, and their histopathology is also associated with certain "pitfalls". Basal cell carcinoma should be distinguished from hair follicles, folliculocentric basaloid proliferations, poromas, nevus sebaceous, desmoplastic trichoepitheliomas, and spiradenomas, to name but a few histologic entities. Similarly, squamous cell carcinoma should be distinguished from hypertrophic actinic keratoses, pseudoepitheliomatous hyperplasia, sebaceous carcinoma, and microcystic adnexal carcinoma. In addition, there are numerous subtypes of basal cell and squamous carcinomas that the Mohs surgeon should be aware of due to differences in the biologic behavior of these tumors. This review presents a number of the common histologic pitfalls of Mohs micrographic surgery and a review of tumor histology.
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Affiliation(s)
- Davida A Kornreich
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
| | - Jason B Lee
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania
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Abstract
Background Fibroepithelioma of Pinkus (FeP) is considered a variant of basal cell carcinoma (BCC); however, in the past 20 years, some researchers have argued for its classification as a trichoblastoma. Recently, use of a new immunostaining marker and further dermoscopic characterization of FeP have advanced the debate about its proper classification. Purpose A review of the evidence for and against classification of FeP as BCC or trichoblastoma is presented. Methods Using PubMed, the term FeP was searched and relevant citations were assessed. Additional relevant articles were identified from references of key papers. Results FeP shares characteristics of both trichoblastoma and BCC. Conclusion Derived from the same cell type, BCC and trichoblastoma may be best considered as representing opposite ends of a spectrum of differentiation, with FeP deserving an intermediate classification.
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Affiliation(s)
- Ellen S Haddock
- School of Medicine, University of California San Diego, San Diego, CA, USA.
| | - Philip R Cohen
- Department of Dermatology, University of California San Diego, San Diego, CA, USA
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Longo C, Pellacani G, Tomasi A, Mandel VD, Ponti G. Fibroepithelioma of Pinkus: Solitary tumor or sign of a complex gastrointestinal syndrome. Mol Clin Oncol 2016; 4:797-800. [PMID: 27123282 DOI: 10.3892/mco.2016.794] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 10/23/2015] [Indexed: 01/15/2023] Open
Abstract
Fibroepithelioma of Pinkus (FEP), which is considered to be an uncommon variant of basal cell carcinoma, has been described in association with other systemic diseases. However, no specific studies are currently available on this subject. The aim of our study was to evaluate the clinical and morphological characteristics of FEP and investigate whether this rare tumor is a single entity or seen in the context of a more complex syndrome. We retrospectively analyzed 49 cases of FEP diagnosed and excised in a single academic institution from 1995 to 2011. The tumors were mainly located on the trunk (77.55%), followed by the lower extremities (12.20%) and the head and neck (10.20%). In 9 of the 49 cases (18%), FEP was associated with gastrointestinal tumors. The abovementioned cases are presented in an attempt to make clinicians more aware of a possible association between FEP and gastrointestinal cancer. Although a possible underlying common genetic background between FEP and gastrointestinal tumors was not provided, our study suggests that patients with FEP should be screened for the occurrence of gastrointestinal tumors.
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Affiliation(s)
- Caterina Longo
- Dermatology and Skin Cancer Unit, Arcispedale Santa Maria Nuova-IRCCS, I-42123 Reggio Emilia, Italy
| | - Giovanni Pellacani
- Department of Dermatology, University of Modena and Reggio Emilia, I-41100 Modena, Italy
| | - Aldo Tomasi
- Department of Clinical and Diagnostic Medicine and Public Health, University of Modena and Reggio Emilia, I-41100 Modena, Italy
| | - Victor Desmond Mandel
- Department of Dermatology, University of Modena and Reggio Emilia, I-41100 Modena, Italy
| | - Giovanni Ponti
- Department of Clinical and Diagnostic Medicine and Public Health, University of Modena and Reggio Emilia, I-41100 Modena, Italy
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18
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Peterson SC, Eberl M, Vagnozzi AN, Belkadi A, Veniaminova NA, Verhaegen ME, Bichakjian CK, Ward NL, Dlugosz AA, Wong SY. Basal cell carcinoma preferentially arises from stem cells within hair follicle and mechanosensory niches. Cell Stem Cell 2016; 16:400-12. [PMID: 25842978 DOI: 10.1016/j.stem.2015.02.006] [Citation(s) in RCA: 241] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 01/13/2015] [Accepted: 02/10/2015] [Indexed: 11/19/2022]
Abstract
Basal cell carcinoma (BCC) is characterized by frequent loss of PTCH1, leading to constitutive activation of the Hedgehog pathway. Although the requirement for Hedgehog in BCC is well established, the identity of disease-initiating cells and the compartments in which they reside remain controversial. By using several inducible Cre drivers to delete Ptch1 in different cell compartments in mice, we show here that multiple hair follicle stem cell populations readily develop BCC-like tumors. In contrast, stem cells within the interfollicular epidermis do not efficiently form tumors. Notably, we observed that innervated Gli1-expressing progenitors within mechanosensory touch dome epithelia are highly tumorigenic. Sensory nerves activate Hedgehog signaling in normal touch domes, while denervation attenuates touch dome-derived tumors. Together, our studies identify varying tumor susceptibilities among different stem cell populations in the skin, highlight touch dome epithelia as "hot spots" for tumor formation, and implicate cutaneous nerves as mediators of tumorigenesis.
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Affiliation(s)
- Shelby C Peterson
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Markus Eberl
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Alicia N Vagnozzi
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Abdelmadjid Belkadi
- Departments of Dermatology and Neuroscience, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Natalia A Veniaminova
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Monique E Verhaegen
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Christopher K Bichakjian
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Nicole L Ward
- Departments of Dermatology and Neuroscience, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Andrzej A Dlugosz
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Sunny Y Wong
- Departments of Dermatology and Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA.
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19
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Abstract
Basal cell carcinomas are the most common primary cutaneous malignant neoplasms. The diagnosis of basal cell carcinoma represents a common and routine task for pathologists and dermatopathologists. The aim of this review is the clinical and histopathological presentation of the most common subtypes of basal cell carcinoma. Furthermore, the rare variants of basal cell carcinoma and their differential diagnoses are also discussed.
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Affiliation(s)
- J Liersch
- Dermatopathologie Duisburg, An der Abtei 7-11, 47166, Duisburg, Deutschland
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20
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Danialan R, Mutyambizi K, Aung PP, Prieto VG, Ivan D. Challenges in the diagnosis of cutaneous adnexal tumours. J Clin Pathol 2015; 68:992-1002. [DOI: 10.1136/jclinpath-2015-203228] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The diagnosis of cutaneous adnexal neoplasms, a heterogeneous group of entities, is often perceived by practising pathologists as challenging. A systematic approach to diagnosis is necessary for classification of these lesions, which establishes the tumour differentiation (follicular, sebaceous, sweat gland or apocrine) and evaluates histological features differentiating between benign and malignant entities. Consideration of clinical history is a necessary adjunct in evaluation of the adnexal neoplasm, as characteristic anatomical sites are described for many adnexal lesions. In some instances, immunohistochemical studies may also be employed to aid the diagnosis. The differential diagnosis between primary cutaneous adnexal neoplasms and cutaneous metastases from visceral tumours may also be difficult. Clinical, radiological, histological and immunohistochemical characteristics will be further discussed, considering that the correct diagnosis has a significant impact on the patient's management and prognosis.
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21
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Chu SWW, Biswas A. Basal cell carcinomas showing histological features generally associated with cutaneous adnexal neoplasms. J Cutan Pathol 2015; 42:1049-1062. [PMID: 26264868 DOI: 10.1111/cup.12577] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 09/12/2014] [Accepted: 05/03/2015] [Indexed: 12/28/2022]
Abstract
Basal cell carcinoma (BCC) is the commonest malignant neoplasm in humans. Although a histopathological diagnosis of BCC is straightforward in the vast majority of cases, unusual histological variants can present a diagnostic challenge. A small proportion of BCCs show features which are generally associated with cutaneous adnexal neoplasms. Such changes may involve either the epithelium or the stroma and can mislead the pathologist particularly in small biopsies. Despite the growing evidence which speculate that BCC is a primitive follicular tumor, it is unusual to encounter tumors which actually show definitive signs of adnexal differentiation. This review aims to address this somewhat overlooked aspect of a very common tumor and offers practical guidance to distinguish them from adnexal neoplasms which they might mimic.
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Affiliation(s)
| | - Asok Biswas
- Department of Pathology, Western General Hospital, Edinburgh, UK
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22
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PHLDA1, a follicular stem cell marker, differentiates clear-cell/granular-cell trichoblastoma and clear-cell/granular cell basal cell carcinoma: a case-control study, with first description of granular-cell trichoblastoma. Am J Dermatopathol 2015; 36:643-50. [PMID: 23719479 DOI: 10.1097/dad.0b013e31828a31ae] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Granular-cell or clear-cell basal cell carcinomas (BCCs), and clear-cell trichoblastomas have rarely been reported in the literature. PHLDA1 is a follicular stem cell marker, the expression of which has been reported to differentiate trichoepithelioma from BCCs. We wondered whether (1) granular-cell trichoblastoma exists and (2) PHLDA1 expression can differentiate a clear- and/or granular-cell trichoblastoma and a BCC. METHODS In the records of 2 pathology departments, 12 clear- and/or granular-cell trichoblastomas and BCCs were found. Epidemiological, histopathological, and immunohistochemical data for PHLDA1, Ki67, and AE1-AE3; and cytokeratins 17, 19, 20, and 6hf were collected. RESULTS Trichoblastomas and clear- and/or granular-cell BCCs occurred in 7 patients (36-62 years; mean: 49) and in 5 patients (63-91 years; mean: 77), respectively. Three granular-cell trichoblastomas were identified. Both granular and clear-cell changes were present in 4 BCCs. The patterns of expression for AE1/AE3, CK17, CK19, CK6hf, and CK20 were not helpful in differentiating trichoblastoma from BCC. PHLDA1 expression was diffusely or partially present in all trichoblastomas (5/5) and absent in BCCs (0/4) (P = 0.008). CONCLUSIONS Granular- and/or clear-cell changes are rare findings in trichoblastoma and BCC. First, we show that granular-cell trichoblastomas do occur. Second, PHLDA1 expression is a useful addition in differentiating trichoblastoma and BCC.
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23
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Honarpisheh H, Glusac EJ, Ko CJ. Cytokeratin 20 expression in basaloid follicular hamartoma and infundibulocystic basal cell carcinoma. J Cutan Pathol 2014; 41:916-21. [DOI: 10.1111/cup.12410] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 09/19/2014] [Accepted: 10/26/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Hedieh Honarpisheh
- Department of Pathology; Yale University School of Medicine; New Haven CT USA
| | - Earl J. Glusac
- Department of Pathology; Yale University School of Medicine; New Haven CT USA
- Department of Dermatology; Yale University School of Medicine; New Haven CT USA
| | - Christine J. Ko
- Department of Pathology; Yale University School of Medicine; New Haven CT USA
- Department of Dermatology; Yale University School of Medicine; New Haven CT USA
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24
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Marusic Z, Kos M, Labinac-Peteh L, Perković Bečić M, Vranić S, Luzar B. Cystic fibroepithelioma of Pinkus: two new cases and cystic changes in classical fibroepithelioma of Pinkus. Bosn J Basic Med Sci 2014; 14:205-8. [PMID: 25428671 DOI: 10.17305/bjbms.2014.4.116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 09/11/2014] [Accepted: 09/12/2014] [Indexed: 11/16/2022] Open
Abstract
We report two new cases of cystic fibroepithelioma of Pinkus together with immunohistochemical features and analyze the presence of cystic changes in a series of 16 classical fibroepitheliomas of Pinkus. Our findings show that the formation of cystic spaces is most probably caused by ischemic degeneration of stromal fenestrations, rather than by central tumor cell necrosis. This finding is supported by lack of CD34 positive blood vessels in edematous and hyalinized stromal fenestrations undergoing transformation into cystic spaces, as opposed to the uninvolved stromal fenestrations. Therefore, it is probably more accurate to refer to this process as pseudocystic stromal degeneration rather than true cyst formation. Also, two out of 16 classical Pinkus fibroepitheliomas exhibited focal pseudocystic changes in 50% and 10% of the tumor, respectively, demonstrating that this degenerative process can be found, rarely and focally, in classical cases as well.
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Affiliation(s)
- Zlatko Marusic
- Department of Pathology, Clinical Hospital Center Sestre Milosrdnice, Zagreb, Croatia.
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25
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Li G, Wang X, Hibshoosh H, Jin C, Halmos B. Modulation of ErbB2 blockade in ErbB2-positive cancers: the role of ErbB2 Mutations and PHLDA1. PLoS One 2014; 9:e106349. [PMID: 25238247 PMCID: PMC4169529 DOI: 10.1371/journal.pone.0106349] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 08/06/2014] [Indexed: 12/20/2022] Open
Abstract
We set out to study the key effectors of resistance and sensitivity to ErbB2 tyrosine kinase inhibitors, such as lapatinib in ErbB2-positive breast and lung cancers. A cell-based in vitro site-directed mutagenesis lapatinib resistance model identified several mutations, including the gatekeeper ErbB2 mutation ErbB2-T798I, as mediating resistance. ErbB2-T798I engineered cell models indeed show resistance to lapatinib but remain sensitive to the irreversible EGFR/ErbB2 inhibitor, PD168393, suggestive of potential alternative treatment strategies to overcome resistance. Gene expression profiling studies identified a select group of downstream targets regulated by ErbB2 signaling and define PHLDA1 as an immediately downregulated gene upon oncogenic ErbB2 signaling inhibition. We find significant down-regulation of PHLDA1 in primary breast cancer and PHLDA1 is statistically significantly less expressed in ErbB2 negative compared with ErbB2 positive tumors consistent with its regulation by ErbB2. Lastly, PHLDA1 overexpression blocks AKT signaling, inhibits cell growth and enhances lapatinib sensitivity further supporting an important negative growth regulator function. Our findings suggest that PHLDA1 might have key inhibitory functions in ErbB2 driven lung and breast cancer cells and a better understanding of its functions might point at novel therapeutic options. In summary, our studies define novel ways of modulating sensitivity and resistance to ErbB2 inhibition in ErbB2-dependent cancers.
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Affiliation(s)
- Guangyuan Li
- Department of Pathology, University Hospitals of Case Medical Center, Case Western Reserve University, Cleveland, Ohio, United States of America
- Division of Hematology/Oncology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York, United States of America
| | - Xiaoqi Wang
- Division of Hematology/Oncology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York, United States of America
| | - Hanina Hibshoosh
- Department of Pathology, Columbia University Medical Center, New York, New York, United States of America
| | - Cheng Jin
- Division of Hematology/Oncology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York, United States of America
| | - Balazs Halmos
- Division of Hematology/Oncology, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York, United States of America
- * E-mail:
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26
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Battistella M, Carlson JA, Osio A, Langbein L, Cribier B. Skin tumors with matrical differentiation: lessons from hair keratins, beta-catenin and PHLDA-1 expression. J Cutan Pathol 2014; 41:427-36. [PMID: 24673383 DOI: 10.1111/cup.12313] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 01/11/2014] [Accepted: 01/30/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND Pilomatricomas are tumors that emulate the differentiation of matrix cells of the hair follicle, showing cortical differentiation, with sequential expression of K35 and K31 keratins. Beta-catenin gene is frequently mutated in pilomatricoma, leading to beta-catenin nuclear accumulation, and to downstream expression of LEF1. Skin matrical tumors other than pilomatricoma are very rare, and comprise purely matrical tumors and focally matrical tumors. We aimed at studying cortical differentiation, beta-catenin pathway and expression of the follicular stem-cell marker PHLDA1 in a series of matrical tumors other than pilomatricoma. METHODS In 36 prospectively collected tumors, K31, K35, CK17, LEF1, HOXC13, beta-catenin and PHLDA1 expressions were evaluated. Five pilomatricomas were used as controls. RESULTS In 18 purely matrical tumors (11 matrical carcinomas, 4 melanocytic matricomas, 3 matricomas) and 18 focally matrical tumors (11 basal cell carcinomas, 3 trichoepithelioma/trichoblastomas, 4 others), sequential K35, HOXC13 and K31 expressions were found, indicating cortical differentiation. Germinative matrix cells were always CK17-, and showed nuclear beta-catenin accumulation, with LEF1 and PHLDA1 expressions. CONCLUSIONS Nuclear beta-catenin and LEF1 expression was highly conserved in matrical tumors, and suggested a common tumorigenesis driven by Wnt pathway activation. PHLDA1 was consistently expressed in matrical tumors and in areas of matrical differentiation.
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Affiliation(s)
- Maxime Battistella
- Laboratoire de pathologie, Sorbonne Paris Cité, Université Paris Diderot, UMR-S 1165, Paris, France; INSERM, U1165-Paris, Paris, France; Laboratoire de pathologie, AP-HP-Hôpital Saint-Louis, Paris, France
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27
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Saggini A, Mully T. Reactive eccrine syringofibroadenomatosis secondary to primary cutaneous amyloidosis: a novel association. J Cutan Pathol 2014; 41:380-5. [PMID: 24325801 DOI: 10.1111/cup.12276] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 12/02/2013] [Accepted: 12/05/2013] [Indexed: 12/01/2022]
Abstract
We report the unprecedented case of reactive eccrine syringofibroadenoma (ESFA) secondary to primary cutaneous amyloidosis. A 62-year-old woman of Asian ethnicity presented with a pruritic rash on the back of long-standing duration. Physical examination revealed diffuse hyperpigmentation localized to the interscapular region; there were a multitude of hyperpigmented macules merged in a rippled pattern intermixed with scattered papules and cobblestone-like areas. A punch biopsy from a papule was taken. Histopathological examination revealed a network of epithelial strands and cords hanging from the epidermis and harboring foci of ductal differentiation. Eosinophilic collections of amorphous material were found between the epithelial strands, obscuring the superficial dermis. The microscopic picture was consistent with primary cutaneous amyloidosis associated with reactive ESFA. Results of histochemical and immunohistochemical staining confirmed the diagnosis. We speculate that pathogenetic mechanisms intrinsic to primary cutaneous amyloidosis, in addition to unknown genetic factors, resulted in clinical changes of lichen amyloidosus associated with an abnormal hyperplastic epithelial response with histopathological features of ESFA rather than the common epidermal change of acanthosis and hyperkeratosis.
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Affiliation(s)
- Andrea Saggini
- Department of Dermatology, University of Rome Tor Vergata, Rome, Italy
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28
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Abstract
Our knowledge on stem cells of the hair follicle has increased exponentially after the bulge was characterized as the stem cell niche two decades ago. In contrast, little is known about stem cells in the nail unit. Whereas hair follicles are plentiful and easy to access, the human body has only twenty nails and they are rarely biopsied. Therefore, examining fetal material offers unique advantages. In the following mini-review, our current knowledge on nail stem cells is summarized and analogies to the hair follicle stem cells are drawn.
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Affiliation(s)
- Klaus Sellheyer
- Department of Dermatology A61, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
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29
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Abstract
This article reviews the recent dermatopathology literature regarding cutaneous adnexal neoplasms, with emphasis on new and underrecognized entities, "old entities" with new findings, advances in immunohistochemistry, and new findings in relation to inherited disorders associated with cutaneous adnexal neoplasms.
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30
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Sellheyer K, Cribier B, Nelson P, Kutzner H, Rütten A. Basaloid tumors in nevus sebaceus revisited: the follicular stem cell marker PHLDA1 (TDAG51) indicates that most are basal cell carcinomas and not trichoblastomas. J Cutan Pathol 2013; 40:455-62. [DOI: 10.1111/cup.12107] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2013] [Indexed: 11/29/2022]
Affiliation(s)
| | - Bernard Cribier
- Clinique Dermatologique; Hôpitaux Universitaires de Strasbourg; Strasbourg; France
| | - Paula Nelson
- Nelson Dermatopathology Associates; Atlanta; GA; USA
| | - Heinz Kutzner
- Dermatopathologie Friedrichshafen; Friedrichshafen; Germany
| | - Arno Rütten
- Dermatopathologie Friedrichshafen; Friedrichshafen; Germany
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31
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Sellheyer K, Nelson P, Kutzner H, Patel RM. The immunohistochemical differential diagnosis of microcystic adnexal carcinoma, desmoplastic trichoepithelioma and morpheaform basal cell carcinoma using BerEP4 and stem cell markers. J Cutan Pathol 2013; 40:363-70. [DOI: 10.1111/cup.12085] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Accepted: 11/19/2012] [Indexed: 01/14/2023]
Affiliation(s)
| | - Paula Nelson
- Nelson Dermatopathology Associates; Atlanta; GA; USA
| | - Heinz Kutzner
- Dermatopathologie Friedrichshafen; Friedrichshafen; Germany
| | - Rajiv M. Patel
- Departments of Pathology and Dermatology; University of Michigan Medical Center; Ann Arbor; MI; USA
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32
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Reggiani C, Zalaudek I, Piana S, Longo C, Argenziano G, Lallas A, Pellacani G, Moscarella E. Fibroepithelioma of Pinkus: Case Reports and Review of the Literature. Dermatology 2013; 226:207-11. [DOI: 10.1159/000348707] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 02/01/2013] [Indexed: 11/19/2022] Open
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