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Gill M, Sahu A, Alessi-Fox C, Cordova M, Gonzalez S, Iftimia N, Aleissa S, Navarrete-Dechent C, Dusza S, Rossi A, Marghoob AA, Rajadhyaksha M, Chen CSJ. Angulated small nests and cords: Key diagnostic histopathologic features of infiltrative basal cell carcinoma can be identified using integrated reflectance confocal microscopy-optical coherence tomography. J Cutan Pathol 2021; 48:53-65. [PMID: 32989842 PMCID: PMC7755835 DOI: 10.1111/cup.13871] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 07/27/2020] [Accepted: 08/23/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND Accurate basal cell carcinoma (BCC) subtyping is requisite for appropriate management, but non-representative sampling occurs in 18% to 25% of biopsies. By enabling non-invasive diagnosis and more comprehensive sampling, integrated reflectance confocal microscopy-optical coherence tomography (RCM-OCT) may improve the accuracy of BCC subtyping and subsequent management. We evaluated RCM-OCT images and histopathology slides for the presence of two key features, angulation and small nests and cords, and calculated (a) sensitivity and specificity of these features, combined and individually, for identifying an infiltrative BCC subtype and (b) agreement across modalities. METHODS Thirty-three RCM-OCT-imaged, histopathologically-proven BCCs (17 superficial and/or nodular; 16 containing an infiltrative component) were evaluated. RESULTS The presence of angulation or small nests and cords was sufficient to identify infiltrative BCC on RCM-OCT with 100% sensitivity and 82% specificity, similar to histopathology (100% sensitivity, 88% specificity, kappa = 0.82). When both features were present, the sensitivity for identifying infiltrative BCC was 100% using either modality and specificity was 88% on RCM-OCT vs 94% on histopathology, indicating near-perfect agreement between non-invasive and invasive diagnostic modalities (kappa = 0.94). CONCLUSIONS RCM-OCT can non-invasively identify key histopathologic features of infiltrative BCC offering a possible alternative to traditional invasive biopsy.
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Affiliation(s)
- Melissa Gill
- Department of Pathology, SUNY Downstate Medical Center, Brooklyn, NY, USA
- SkinMedical Research and Diagnostics, P.L.L.C., Dobbs Ferry, NY, USA
- Faculty of Medicine and Health Sciences, University of Alcala de Henares, Madrid, Spain
| | - Aditi Sahu
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; USA
| | - Christi Alessi-Fox
- Caliber Imaging and Diagnostics Inc., 50 Methodist Hill Drive Suite 1000, Rochester, NY
| | - Miguel Cordova
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; USA
| | - Salvador Gonzalez
- Faculty of Medicine and Health Sciences, University of Alcala de Henares, Madrid, Spain
| | - Nicusor Iftimia
- Physical Sciences, Inc., 20 New England Business Ctr. Drive, Andover, MA
| | - Saud Aleissa
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; USA
| | | | - Stephen Dusza
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; USA
| | - Anthony Rossi
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; USA
| | - Ashfaq A. Marghoob
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; USA
| | - Milind Rajadhyaksha
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; USA
| | - Chih-Shan J. Chen
- Dermatology Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; USA
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Huang K, Li Y, Shim AR, Virk RKA, Agrawal V, Eshein A, Nap RJ, Almassalha LM, Backman V, Szleifer I. Physical and data structure of 3D genome. Sci Adv 2020; 6:eaay4055. [PMID: 31950084 PMCID: PMC6954067 DOI: 10.1126/sciadv.aay4055] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 11/20/2019] [Indexed: 05/05/2023]
Abstract
With the textbook view of chromatin folding based on the 30-nm fiber being challenged, it has been proposed that interphase DNA has an irregular 10-nm nucleosome polymer structure whose folding philosophy is unknown. Nevertheless, experimental advances suggest that this irregular packing is associated with many nontrivial physical properties that are puzzling from a polymer physics point of view. Here, we show that the reconciliation of these exotic properties necessitates modularizing three-dimensional genome into tree data structures on top of, and in striking contrast to, the linear topology of DNA double helix. These functional modules need to be connected and isolated by an open backbone that results in porous and heterogeneous packing in a quasi-self-similar manner, as revealed by our electron and optical imaging. Our multiscale theoretical and experimental results suggest the existence of higher-order universal folding principles for a disordered chromatin fiber to avoid entanglement and fulfill its biological functions.
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Affiliation(s)
- Kai Huang
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Corresponding author. (K.H.); (V.B.); (I.S.)
| | - Yue Li
- Applied Physics Program, Northwestern University, Evanston, IL 60208, USA
| | - Anne R. Shim
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Ranya K. A. Virk
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Vasundhara Agrawal
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Adam Eshein
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Rikkert J. Nap
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
| | - Luay M. Almassalha
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Feinberg School of Medicine, Northwestern University, Chicago, IL, 60611, USA
| | - Vadim Backman
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Corresponding author. (K.H.); (V.B.); (I.S.)
| | - Igal Szleifer
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Corresponding author. (K.H.); (V.B.); (I.S.)
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