Scanning electron microscopy of dermatofibroma

Quintana, Felipe Simões Lopes; Almeida, Hiram Larangeira de; Ruas, Caroline Pires; Jorge, Valéria Magalhães

doi:10.1590/abd1806-4841.20197906

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Images in Dermatology • An. Bras. Dermatol. 94 (3) • May-Jun 2019 • https://doi.org/10.1590/abd1806-4841.20197906 linkcopy

Scanning electron microscopy of dermatofibroma^*

Authorship SCIMAGO INSTITUTIONS RANKINGS

Dermatofibroma is a proliferation of spindle cells located in the dermis. We used scanning electron microscopy to examine two histologically confirmed lesions and observed preserved collagen bundles in the perilesional area. In the lesional area, the collagen was denser, without formation of bundles. Higher magnification showed collagen with mesh-like appearance similar to stretched tufts of cotton. Very high magnification evidenced the tufts of cotton and spindle cells measuring 2 to 12 microns.

Keywords:
Collagen; Histiocytoma, Benign Fibrous; Microscopy, Electron, Scanning

Authorship

person Felipe Simões Lopes Quintana

schoolPost-Graduation Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas (RS), Brazil.Universidade Católica de PelotasBrazilPelotas, RS, BrazilPost-Graduation Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas (RS), Brazil.schoolUniversity Hospital, Universidade Federal de Pelotas, Pelotas (RS), Brazil.Universidade Federal de PelotasBrazilPelotas, RS, BrazilUniversity Hospital, Universidade Federal de Pelotas, Pelotas (RS), Brazil.

0000-0003-2781-1869

person Hiram Larangeira de Almeida Jr.

schoolPost-Graduation Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas (RS), Brazil.Universidade Católica de PelotasBrazilPelotas, RS, BrazilPost-Graduation Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas (RS), Brazil.schoolDepartment of Dermatology, Universidade Federal de Pelotas, Pelotas (RS), Brazil.Universidade Federal de PelotasBrazilPelotas, RS, BrazilDepartment of Dermatology, Universidade Federal de Pelotas, Pelotas (RS), Brazil.

0000-0003-0705-1778

person Caroline Pires Ruas

schoolElectron Microscopy Center of the South, Fundação Universidade de Rio Grande, Rio Grande (RS), Brazil.Fundação Universidade de Rio GrandeBrazilRio Grande, RS, BrazilElectron Microscopy Center of the South, Fundação Universidade de Rio Grande, Rio Grande (RS), Brazil.

0000-0002-6917-1727

person Valéria Magalhães Jorge

schoolPost-Graduation Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas (RS), Brazil.Universidade Católica de PelotasBrazilPelotas, RS, BrazilPost-Graduation Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas (RS), Brazil.schoolPathology Department, Universidade Federal de Pelotas, Pelotas (RS), Brazil.Universidade Federal de PelotasBrazilPelotas, RS, BrazilPathology Department, Universidade Federal de Pelotas, Pelotas (RS), Brazil.

0000-0003-3153-6847

Mailing Address: Hiram Larangeira de Almeida Jr. E-mail:
hiramalmeidajr@hotmail.com

Conflict of interest: None.

AUTHORS’CONTRIBUTIONS

Felipe Simões Lopes Quintana

0000-0003-2781-1869

Hiram Larangeira de Almeida Jr

0000-0003-0705-1778

Approval of the final version of the manuscript; Conception and planning of the study; Elaboration and writing of the manuscript; Obtaining, analyzing and interpreting the data; Effective participation in research orientation; Critical review of the literature; Critical review of the manuscript

Caroline Pires Ruas

0000-0002-6917-1727

Approval of the final version of the manuscript; Obtaining, analyzing and interpreting the data; Critical review of the manuscript

Valéria Magalhães Jorge

0000-0003-3153-6847

Approval of the final version of the manuscript; Conception and planning of the study; Elaboration and writing of the manuscript; Obtaining, analyzing and interpreting the data; Effective participation in research orientation; Intellectual participation in propaedeutic and/or therapeutic conduct of the cases studied; Critical review of the literature; Critical review of the manuscript

SCIMAGO INSTITUTIONS RANKINGS

Post-Graduation Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas (RS), Brazil.Universidade Católica de PelotasBrazilPelotas, RS, BrazilPost-Graduation Program in Health and Behavior, Universidade Católica de Pelotas, Pelotas (RS), Brazil.

University Hospital, Universidade Federal de Pelotas, Pelotas (RS), Brazil.Universidade Federal de PelotasBrazilPelotas, RS, BrazilUniversity Hospital, Universidade Federal de Pelotas, Pelotas (RS), Brazil.

Department of Dermatology, Universidade Federal de Pelotas, Pelotas (RS), Brazil.Universidade Federal de PelotasBrazilPelotas, RS, BrazilDepartment of Dermatology, Universidade Federal de Pelotas, Pelotas (RS), Brazil.

Electron Microscopy Center of the South, Fundação Universidade de Rio Grande, Rio Grande (RS), Brazil.Fundação Universidade de Rio GrandeBrazilRio Grande, RS, BrazilElectron Microscopy Center of the South, Fundação Universidade de Rio Grande, Rio Grande (RS), Brazil.

Pathology Department, Universidade Federal de Pelotas, Pelotas (RS), Brazil.Universidade Federal de PelotasBrazilPelotas, RS, BrazilPathology Department, Universidade Federal de Pelotas, Pelotas (RS), Brazil.

Figures

Figures (3)

Thumbnail

Figure 1 Light Microscopy - A - Collagen homogenization with cell proliferation (asterisks) with normal collagen in the lower portion (NC) (hematoxylin & eosin, x150). B - similar aspect in the lesion border, with involvement of the papillary dermis (hematoxylin & eosin, x150). C - detail of the fusiform cells (arrows) (hematoxylin & eosin, x400). D - diminished elastic fibers in the homogenous area, with clear demarcation of normal elastic tissue (arrows) in the lower portion (Weigert’s stain, x150)

Thumbnail

Figure 2 Scanning electron microscopy. A - Low magnification of the perilesional area with normal collagen bundles (x450). B - High er magnification of normal collagen bundles (x1.700). C - Low mag nification of the lesional area with compact tufted collagen (x450). D - Higher magnification of affected compacted collagen (x2.000)

Thumbnail

Figure 3 Scanning electron microscopy. A - Detail of the affected area with tufted collagen without bundle formation (x3.000). B e C - Detail of fusiform cells, measuring 2 to 12 microns (x7,000 and x8,000)

imageFigure 1 Light Microscopy - A - Collagen homogenization with cell proliferation (asterisks) with normal collagen in the lower portion (NC) (hematoxylin & eosin, x150). B - similar aspect in the lesion border, with involvement of the papillary dermis (hematoxylin & eosin, x150). C - detail of the fusiform cells (arrows) (hematoxylin & eosin, x400). D - diminished elastic fibers in the homogenous area, with clear demarcation of normal elastic tissue (arrows) in the lower portion (Weigert’s stain, x150) open_in_new

imageFigure 2 Scanning electron microscopy. A - Low magnification of the perilesional area with normal collagen bundles (x450). B - High er magnification of normal collagen bundles (x1.700). C - Low mag nification of the lesional area with compact tufted collagen (x450). D - Higher magnification of affected compacted collagen (x2.000) open_in_new

imageFigure 3 Scanning electron microscopy. A - Detail of the affected area with tufted collagen without bundle formation (x3.000). B e C - Detail of fusiform cells, measuring 2 to 12 microns (x7,000 and x8,000) open_in_new

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Scanning electron microscopy of dermatofibroma*

Scanning electron microscopy of dermatofibroma^*