Robert Baran, MD, PhD, is Head of the Nail Disease Centre, Cannes, France, and Former Consultant- Dermatologist at the Gustave Roussy Cancer Institute, Villejuif, Paris, France. He is also an Honorary Professor of the University of Franche-Comté, Besançon, France. David de Berker, BA, MBBS, MRCP, PhD, is a Consultant Dermatologist at Bristol Royal Infirmary, Bristol, UK. Mark Holzberg, MD, PhD, is Clinical Assistant Professor, Department of Dermatology, Emory University School of Medicine and Founder, Newnan Dermatology, Newnan, Georgia, USA. Bianca Maria Piraccini, MD, PhD, is Associate Professor in Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy. Bertrand Richert, MD, PhD, is Professor of Dermatology at Brugmann, St Pierre and HUDERF University Hospitals, Université Libre de Bruxelles, Brussels, Belgium. Luc Thomas, MD, PhD, is Professor of Dermatology and Chairman at Centre Hospitalier Lyon Sud, Lyon 1 University and Lyon Cancer Research Center, Lyon, France.

• List of Contributors viiList of Abbreviations ixForeword xiPreface xiiiAbout the Companion Website xivPart I The Normal Nail and Nail Signs 11 Science of the Nail Apparatus 1David de Berker, Beth S. Ruben, and Robert Baran2 Physical Signs 59Adam Rubin, Mark Holzberg, and Robert BaranPart II Imaging of the Nail Unit 1053 Nail Photography 105Paola Pasquali4 Dermoscopy 113Luc Thomas, Sébastien Debarbieux, and Amélie Boespflug5 Ultrasound and Other Imaging Methods 140Ximena Wortsman, Gregor B.E. Jemec, and Axel Villani6 Magnetic Resonance Imaging 175Jean‐Luc Drapé7 Nail Fold Capillary Microscopy or Capillaroscopy 201Gregor B.E. Jemec8 Confocal Microscopy 204Sébastien Debarbieux, Amélie Boespflug, Bruno Labeille, and Luc ThomasPart III Nail Disorders Occurring Principally in Childhood 2139 Hereditary and Congenital Nail Disorders 213Smail Hadj‐Rabia, Rudolf Happle, Bianca Maria Piraccini, and Robert Baran10 Nail Disorders in Childhood 297David de Berker, Bianca Maria Piraccini, Beth S. Ruben, and Robert BaranPart IV Nail Disorders in the Elderly 33711 The Aging Nail and Related Disorders 337Bertrand RichertPart V Nail Infections 34912 Fungal (Onychomycosis) and Other Infections Involving the Nail Apparatus 349Roderick J. Hay, Boni Elewski, Bianca Maria Piraccini, Nikki Sullivan, Casey Wang, and Robert Baran13 Bacterial, Viral, and Other Infections 390Archana Singal and Bertrand RichertPart VI The Nail in Dermatological Conditions 40914 Dermatological Disorders 409Bianca Maria Piraccini, Mark Holzberg, Marcel Pasch, and Dimitrios RigopoulosPart VII The Nail in Systemic Conditions 48115 The Nail in Systemic Disease 481Mark Holzberg and Bianca Maria Piraccini16 Drug‐induced Nail Disorders 574Bianca Maria Piraccini17 Anticancer Therapies 604Vincent Sibaud, Robert Baran, Bianca Maria Piraccini, Mario E. Lacouture, and Caroline RobertPart VIII The Nail in Occupational, Podiatric, and Cosmetic Conditions 61718 Occupational Abnormalities and Contact Dermatitis 617Robert Baran and An Goossens19 Cosmetics: the Care and Adornment of the Nail 646Douglas Schoon and Robert Baran20 Trauma from Footwear and Pedal Deformities 662Bertrand RichertPart IX Nail Tumors and Surgery 67521 Tumors of the Nail Apparatus and Adjacent Tissues 675Marcel Pasch, Eckart Haneke, Robert Baran, Luc Thomas, and Bertrand Richert22 Nail Surgery 825Bertrand Richert, Eckart Haneke, Elvin G. Zook, and Robert BaranAppendix 896Mark HolzbergIndex 949

Robert Baran, MD, PhD, is Head of the Nail Disease Centre, Cannes, France, and Former Consultant- Dermatologist at the Gustave Roussy Cancer Institute, Villejuif, Paris, France. He is also an Honorary Professor of the University of Franche-Comté, Besançon, France. David de Berker, BA, MBBS, MRCP, PhD, is a Consultant Dermatologist at Bristol Royal Infirmary, Bristol, UK. Mark Holzberg, MD, PhD, is Clinical Assistant Professor, Department of Dermatology, Emory University School of Medicine and Founder, Newnan Dermatology, Newnan, Georgia, USA. Bianca Maria Piraccini, MD, PhD, is Associate Professor in Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy. Bertrand Richert, MD, PhD, is Professor of Dermatology at Brugmann, St Pierre and HUDERF University Hospitals, Université Libre de Bruxelles, Brussels, Belgium. Luc Thomas, MD, PhD, is Professor of Dermatology and Chairman at Centre Hospitalier Lyon Sud, Lyon 1 University and Lyon Cancer Research Center, Lyon, France.

• List of Contributors viiList of Abbreviations ixForeword xiPreface xiiiAbout the Companion Website xivPart I The Normal Nail and Nail Signs 11 Science of the Nail Apparatus 1David de Berker, Beth S. Ruben, and Robert Baran2 Physical Signs 59Adam Rubin, Mark Holzberg, and Robert BaranPart II Imaging of the Nail Unit 1053 Nail Photography 105Paola Pasquali4 Dermoscopy 113Luc Thomas, Sébastien Debarbieux, and Amélie Boespflug5 Ultrasound and Other Imaging Methods 140Ximena Wortsman, Gregor B.E. Jemec, and Axel Villani6 Magnetic Resonance Imaging 175Jean‐Luc Drapé7 Nail Fold Capillary Microscopy or Capillaroscopy 201Gregor B.E. Jemec8 Confocal Microscopy 204Sébastien Debarbieux, Amélie Boespflug, Bruno Labeille, and Luc ThomasPart III Nail Disorders Occurring Principally in Childhood 2139 Hereditary and Congenital Nail Disorders 213Smail Hadj‐Rabia, Rudolf Happle, Bianca Maria Piraccini, and Robert Baran10 Nail Disorders in Childhood 297David de Berker, Bianca Maria Piraccini, Beth S. Ruben, and Robert BaranPart IV Nail Disorders in the Elderly 33711 The Aging Nail and Related Disorders 337Bertrand RichertPart V Nail Infections 34912 Fungal (Onychomycosis) and Other Infections Involving the Nail Apparatus 349Roderick J. Hay, Boni Elewski, Bianca Maria Piraccini, Nikki Sullivan, Casey Wang, and Robert Baran13 Bacterial, Viral, and Other Infections 390Archana Singal and Bertrand RichertPart VI The Nail in Dermatological Conditions 40914 Dermatological Disorders 409Bianca Maria Piraccini, Mark Holzberg, Marcel Pasch, and Dimitrios RigopoulosPart VII The Nail in Systemic Conditions 48115 The Nail in Systemic Disease 481Mark Holzberg and Bianca Maria Piraccini16 Drug‐induced Nail Disorders 574Bianca Maria Piraccini17 Anticancer Therapies 604Vincent Sibaud, Robert Baran, Bianca Maria Piraccini, Mario E. Lacouture, and Caroline RobertPart VIII The Nail in Occupational, Podiatric, and Cosmetic Conditions 61718 Occupational Abnormalities and Contact Dermatitis 617Robert Baran and An Goossens19 Cosmetics: the Care and Adornment of the Nail 646Douglas Schoon and Robert Baran20 Trauma from Footwear and Pedal Deformities 662Bertrand RichertPart IX Nail Tumors and Surgery 67521 Tumors of the Nail Apparatus and Adjacent Tissues 675Marcel Pasch, Eckart Haneke, Robert Baran, Luc Thomas, and Bertrand Richert22 Nail Surgery 825Bertrand Richert, Eckart Haneke, Elvin G. Zook, and Robert BaranAppendix 896Mark HolzbergIndex 949

Robert Baran, MD, PhD, is Head of the Nail Disease Centre, Cannes, France, and Former Consultant- Dermatologist at the Gustave Roussy Cancer Institute, Villejuif, Paris, France. He is also an Honorary Professor of the University of Franche-Comté, Besançon, France. David de Berker, BA, MBBS, MRCP, PhD, is a Consultant Dermatologist at Bristol Royal Infirmary, Bristol, UK. Mark Holzberg, MD, PhD, is Clinical Assistant Professor, Department of Dermatology, Emory University School of Medicine and Founder, Newnan Dermatology, Newnan, Georgia, USA. Bianca Maria Piraccini, MD, PhD, is Associate Professor in Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy. Bertrand Richert, MD, PhD, is Professor of Dermatology at Brugmann, St Pierre and HUDERF University Hospitals, Université Libre de Bruxelles, Brussels, Belgium. Luc Thomas, MD, PhD, is Professor of Dermatology and Chairman at Centre Hospitalier Lyon Sud, Lyon 1 University and Lyon Cancer Research Center, Lyon, France.

• List of Contributors viiList of Abbreviations ixForeword xiPreface xiiiAbout the Companion Website xivPart I The Normal Nail and Nail Signs 11 Science of the Nail Apparatus 1David de Berker, Beth S. Ruben, and Robert Baran2 Physical Signs 59Adam Rubin, Mark Holzberg, and Robert BaranPart II Imaging of the Nail Unit 1053 Nail Photography 105Paola Pasquali4 Dermoscopy 113Luc Thomas, Sébastien Debarbieux, and Amélie Boespflug5 Ultrasound and Other Imaging Methods 140Ximena Wortsman, Gregor B.E. Jemec, and Axel Villani6 Magnetic Resonance Imaging 175Jean‐Luc Drapé7 Nail Fold Capillary Microscopy or Capillaroscopy 201Gregor B.E. Jemec8 Confocal Microscopy 204Sébastien Debarbieux, Amélie Boespflug, Bruno Labeille, and Luc ThomasPart III Nail Disorders Occurring Principally in Childhood 2139 Hereditary and Congenital Nail Disorders 213Smail Hadj‐Rabia, Rudolf Happle, Bianca Maria Piraccini, and Robert Baran10 Nail Disorders in Childhood 297David de Berker, Bianca Maria Piraccini, Beth S. Ruben, and Robert BaranPart IV Nail Disorders in the Elderly 33711 The Aging Nail and Related Disorders 337Bertrand RichertPart V Nail Infections 34912 Fungal (Onychomycosis) and Other Infections Involving the Nail Apparatus 349Roderick J. Hay, Boni Elewski, Bianca Maria Piraccini, Nikki Sullivan, Casey Wang, and Robert Baran13 Bacterial, Viral, and Other Infections 390Archana Singal and Bertrand RichertPart VI The Nail in Dermatological Conditions 40914 Dermatological Disorders 409Bianca Maria Piraccini, Mark Holzberg, Marcel Pasch, and Dimitrios RigopoulosPart VII The Nail in Systemic Conditions 48115 The Nail in Systemic Disease 481Mark Holzberg and Bianca Maria Piraccini16 Drug‐induced Nail Disorders 574Bianca Maria Piraccini17 Anticancer Therapies 604Vincent Sibaud, Robert Baran, Bianca Maria Piraccini, Mario E. Lacouture, and Caroline RobertPart VIII The Nail in Occupational, Podiatric, and Cosmetic Conditions 61718 Occupational Abnormalities and Contact Dermatitis 617Robert Baran and An Goossens19 Cosmetics: the Care and Adornment of the Nail 646Douglas Schoon and Robert Baran20 Trauma from Footwear and Pedal Deformities 662Bertrand RichertPart IX Nail Tumors and Surgery 67521 Tumors of the Nail Apparatus and Adjacent Tissues 675Marcel Pasch, Eckart Haneke, Robert Baran, Luc Thomas, and Bertrand Richert22 Nail Surgery 825Bertrand Richert, Eckart Haneke, Elvin G. Zook, and Robert BaranAppendix 896Mark HolzbergIndex 949