Reflectance Confocal Microscopy of Aging Skin and Skin Cancer
Keywords:
Skin aging, skin cancer, collagen, blood vessels, reflectance confocal microscopyAbstract
Skin aging is a complex process that causes morphologic variations. Some of these variations have
been hypothesized to be involved in skin cancer development. This paper reviews current knowledge
of the features of aged skin as seen with reflectance confocal microscopy (RCM). Basic principles of
the technique are described, and the RCM features of healthy skin and skin cancer are briefly discussed.
Moreover, the RCM features at different layers of young and elderly skin are described, as are
the variations that occur with passing years and in relation to sun exposure that contribute to photoaging
and the development of skin cancer. RCM enables the noninvasive evaluation, at quasi-histologic
resolution, of aging-related skin changes, some of which are shared with skin cancer; this ability helps
avoid skin biopsy. Further research is needed to understand the relation between skin aging and skin
cancer development.
References
Longo C, Galimberti M, De Pace B, Pellacani G, Bencini PL. Laser skin rejuvenation: epidermal changes and collagen remodeling evaluated by in vivo confocal microscopy. Lasers Med Sci. 2013;28:769-776. DOI:10.1007/s10103-012-1145-9. PMID: 22767322.
Rovatti PP, Pellacani G, Guida S. Hyperdiluted calcium hydroxyapatite 1: 2 for mid and lower facial skin rejuvenation: efficacy and safety. Dermatol Surg. 2020; 46:e112-e117. DOI: 10.1097/DSS.0000000000002375. PMID: 32205749.
Yaar M, Gilchrest BA. Photoageing: mechanism, prevention and therapy. Br J Dermatol. 2007; 157:874–87. DOI:10.1111/j.1365-2133.2007.08108.x. PMID: 17711532.
Sachs DL, Varani J, Chubb H, et al. Atrophic and hypertrophic photoaging: Clinical, histologic, and molecular features of 2 distinct phenotypes of photoaged skin. J Am Acad Dermatol. 2019;81:480-488. DOI: 10.1016/j.jaad.2019.03.081. PMID: 30954583.
Kennedy C, Bajdik CD, Willemze R, et al. The influence of painful sunburns and lifetime sun exposure on the risk of actinic keratoses, seborrheic warts, melanocytic nevi, atypical nevi, and skin cancer. J Invest Dermatol. 2003;120:1087-1093. DOI: 10.1046/j.1523-1747.2003.12246.x. PMID: 12787139.
Meeran SM, Punathil T, Katiyar SK. IL-12 deficiency exacerbates inflammatory responses in UV-irradiated skin and skin tumors. J Invest Dermatol. 2008;128:2716-2727. DOI: 10.1038/jid.2008.140. PMID: 18509359.
Gandini S, Autier P, Boniol M. Reviews on sun exposure and artificial light and melanoma. Prog Biophys Mol Biol. 2011;107:362-366. DOI: 10.1016/j.pbiomolbio.2011.09.011.PMID: 21958910.
Franceschi S, Levi F, Randimbison L, La Vecchia C. Site distribution of different types of skin cancer: new aetiological clues. Int J Cancer. 1996;67:24-28. DOI: 10.1002/(SICI)1097-0215(19960703)67:1<24::AID-IJC6>3.0.CO;2-1. PMID:8690520.
Pellacani G, Scope A, Gonzalez S, et al. Reflectance confocal microscopy made easy: The 4 must-know key features for the diagnosis of melanoma and nonmelanoma skin cancers. J Am Acad Dermatol. 2019;81:520-526. DOI: 10.1016/j.jaad.2019.03.085. PMID: 30954581.
Pezzini C, Kaleci S, Chester J, Farnetani F, Longo C, Pellacani G. Reflectance confocal microscopy diagnostic accuracy for malignant melanoma in different clinical settings: systematic review and meta-analysis. J Eur Acad Dermatol Venereol. 2020;34:2268-2279. DOI: 10.1111/jdv.16248. PMID: 31997465.
Guida S, De Pace B, Ciardo S, Farnetani F, Pellacani G. Non-invasive imaging for skin cancers—the European experience. Curr Derm Reports 2019; 8:172-181. DOI: 10.1007/s13671-019-00269-y.
Giuffrida R, Conforti C, Di Meo N, Deinlein T, Guida S, Zalaudek I. Use of noninvasive imaging in the management of skin cancer. Curr Opin Oncol. 2020;32:98-105. DOI: 10.1097/CCO.0000000000000611. PMID: 31850969.
Longo C, Casari A, Beretti F, Cesinaro AM, Pellacani G. Skin aging: in vivo microscopic assessment of epidermal and dermal changes by means of confocal microscopy. J Am Acad Dermatol. 2013;68:e73-82. DOI: 10.1016/j.jaad.2011.08.021. PMID: 22000768.
Rajadhyaksha M, Grossman M, Esterowitz D, Webb RH, Anderson RR. In vivo confocal scanning laser microscopy of human skin: melanin provides strong contrast. J Invest Dermatol. 1995;104:946-52. DOI: 10.1111/1523-1747.ep12606215. PMID: 7769264.
Sauermann K, Clemann S, Jaspers S, et al. Age related changes of human skin investigated with histometric measurements by confocal laser scanning microscopy in vivo. Skin Res Technol. 2002;8:52-56. DOI: 10.1046/j.0909-752x.2001.10297.x. PMID: 12005120.
Longo C. Well-aging: Early detection of skin aging signs. Dermatol Clin. 2016; 34:513-518. DOI: 10.1016/j.det.2016.05.014. PMID: 27692457.
Longo C, Casari A, De Pace B, et al. Proposal for an in vivo histopathologic scoring system for skin aging by means of confocal microscopy. Skin Res Technol. 2013;19:e167-73. DOI: 10.1111/j.1600-0846.2012.00623.x. PMID: 22672873.
Longo C, Zalaudek I, Argenziano G, Pellacani G. New directions in dermatopathology: in vivo confocal microscopy in clinical practice. Dermatol Clin. 2012;30:799-814. DOI: 10.1016/j.det.2012.06.012. PMID: 23021059.
Cinotti E, Bovi C, Tonini G, et al. Structural skin changes in elderly people investigated by reflectance confocal microscopy. J Eur Acad Dermatol Venereol. 2020; 34(11):2652-2658. DOI: 10.1111/jdv.16466 PMID: 32294278.
Wurm EM, Longo C, Curchin C, et al. In vivo assessment of chronological ageing and photoageing in forearm skin using reflectance confocal microscopy. Br J Dermatol. 2012; 167:270-279 DOI: 10.1111/j.1365-2133.2012.10943.x. PMID: 22428802.
Haytoglu NS, Gurel MS, Erdemir A, et al. Assessment of skin photoaging with reflectance confocal microscopy. Skin Res Technol. 2014;20:363-372. DOI: 10.1111/srt.12127. PMID: 24506234.
Guida S, Ciardo S, De Pace B, et al. The influence of MC1R on dermal morphological features of photo-exposed skin in women revealed by reflectance confocal microscopy and optical coherence tomography. Exp Dermatol. 2019;28:1321-1327. DOI: 10.1111/exd.14037. PMID: 31520496.
Guida S, Ciardo S, De Pace B, et al. Atrophic and hypertrophic skin photoaging and melanocortin-1 receptor (MC1R): the missing link. J Am Acad Dermatol. 2021;84:187-190. DOI: 10.1016/j.jaad.2020.04.075. PMID: 32335180.
Rajadhyaksha M, González S, Zavislan JM, Anderson RR, Webb RH. In vivo confocal scanning laser microscopy of human skin II: advances in instrumentation and comparison with histology. J Invest Dermatol. 1999;113:293-303. DOI: 10.1046/j.1523-1747.1999.00690.x. PMID: 10469324.
Arisi M, Zane C, Caravello S, et al. Sun exposure and melanoma, certainties and weaknesses of the present knowledge. Front Med (Lausanne). 2018; 5:235. DOI: 10.3389/fmed.2018.00235. PMID: 30214901.
Suárez B, López-Abente G, Martínez C, et al. Occupation and skin cancer: the results of the HELIOS-I multicenter case-control study. BMC Public Health. 2007;7:180. DOI: 10.1186/1471-2458-7-180. PMID: 17655745.
Ciardo S, Pezzini C, Guida S, et al. A plea for standardization of confocal microscopy and optical coherence tomography parameters to evaluate physiological and para-physiological skin conditions in cosmetic science. Exp Dermatol. 2021. DOI: 10.1111/exd.14359. PMID: 33884663. Epub ahead of print.
Kawasaki K, Yamanishi K, Yamada H. Age-related morphometric changes of inner structures of the skin assessed by in vivo reflectance confocal microscopy. Int J Dermatol. 2015;54:295-301. DOI: 10.1111/ijd.12220. PMID: 25267556.
Fossa Shirata MM, Alves GAD, Maia Campos PMBG. Photoageing-related skin changes in different age groups: a clinical evaluation by biophysical and imaging techniques. Int J Cosmet Sci. 2019;41:265-273. DOI: 10.1111/ics.12531. PMID: 30982995.
Bonnans C, Chou J, Werb Z. Remodelling the extracellular matrix in development and disease. Nat Rev Mol Cell Biol. 2014;15:786-801. DOI: 10.1038/nrm3904. PMID: 25415508.
Pickup MW, Mouw JK, Weaver VM. The extracellular matrix modulates the hallmarks of cancer. EMBO Rep. 2014;15:1243-1253. DOI: 10.15252/embr.201439246. PMID: 25381661
Manfredini M, Longo C, Ferrari B, et al. Dermoscopic and reflectance confocal microscopy features of cutaneous squamous cell carcinoma. J Eur Acad Dermatol Venereol. 2017;31:1828-1833. DOI: 10.1111/jdv.14463. PMID: 28696052.
Guida S, Farnetani F, De Pace B, et al. Flat-pigmented facial lesions without highly specific melanocytic dermoscopy features: the role of dermoscopic globules and dots in differential diagnosis with corresponding reflectance confocal microscopy substrates. J Eur Acad Dermatol Venereol. 2020;34:e153-e156. DOI: 10.1111/jdv.16079. PMID: 31729773.
Navarrete-Dechent C, DeRosa AP, Longo C, et al. Reflectance confocal microscopy terminology glossary for nonmelanocytic skin lesions: A systematic review. J Am Acad Dermatol. 2019;80:1414-1427.e3. DOI: 10.1016/j.jaad.2018.12.007. PMID: 30529706.
Lupu M, Caruntu C, Popa MI, Voiculescu VM, Zurac S, Boda D. Vascular patterns in basal cell carcinoma: Dermoscopic, confocal and histopathological perspectives. Oncol Lett. 2019;17:4112-4125. DOI: 10.3892/ol.2019.10070. PMID: 30944604.
Rishpon A, Kim N, Scope A, et al. Reflectance confocal microscopy criteria for squamous cell carcinomas and actinic keratoses. Arch Dermatol. 2009;145:766-772. DOI: 10.1001/archdermatol.2009.134. PMID: 19620557.
Segura S, Puig S, Carrera C, Palou J, Malvehy J. Dendritic cells in pigmented basal cell carcinoma: a relevant finding by reflectance-mode confocal microscopy. Arch Dermatol. 2007;143:883-886. DOI: 10.1001/archderm.143.7.883. PMID: 17638732.
Agero AL, Busam KJ, Benvenuto-Andrade C, et al. Reflectance confocal microscopy of pigmented basal cell carcinoma. J Am Acad Dermatol. 2006;54:638-643. DOI: 10.1016/j.jaad.2005.11.1096. PMID: 16546585.
Spathis A, Katoulis AC, Damaskou V, et al. BRAF mutation status in primary, recurrent, and metastatic malignant melanoma and its relation to histopathological parameters. Dermatol Pract Concept. 2019;9:54-62. DOI: 10.5826/dpc.0901a13. PMID: 30775150.
Kaur A, Ecker BL, Douglass SM, et al. Remodeling of the collagen matrix in aging skin promotes melanoma metastasis and affects immune cell motility. Cancer Discov. 2019;9:64-81. DOI: 10.1158/2159-8290.CD-18-0193. PMID: 30279173.
Tagliabue E, Gandini S, García-Borrón JC, et al. Association of melanocortin-1 receptor variants with pigmentary traits in humans: A pooled analysis from the M-Skip Project. J Invest Dermatol. 2016;136:1914-1917. DOI: 10.1016/j.jid.2016.05.099. PMID: 27251790.
Tagliabue E, Gandini S, Bellocco R, et al. MC1R variants as melanoma risk factors independent of at-risk phenotypic characteristics: a pooled analysis from the M-SKIP project. Cancer Manag Res. 2018;10:1143-1154. DOI: 10.2147/CMAR.S155283. PMID: 29795986.
Tagliabue E, Fargnoli MC, Gandini S, et al. MC1R gene variants and non-melanoma skin cancer: a pooled-analysis from the M-SKIP project. Br J Cancer. 2015;113:354-363. DOI: 10.1038/bjc.2015.231. PMID: 26103569.
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