Small Animal Dermatology

764 Pages·2016·28.64 MB·English

by  Helton Rhodes Karen

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Blackwell’s Five-Minute
Veterinary Consult
Clinical Companion
Small Animal
Dermatology
Second Edition
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Blackwell’s Five-Minute
Veterinary Consult
Clinical Companion
Small Animal
Dermatology
Second Edition
Karen Helton Rhodes, DVM
Diplomate, American College of Veterinary Dermatology
Riverdale Veterinary Dermatology
Riverdale, New Jersey
and
Alexander H. Werner, VMD
Diplomate, American College of Veterinary Dermatology
Animal Dermatology Center
Studio City, California
A John Wiley & Sons, Inc., Publication
This edition fi rst published 2011 © 2011 by Blackwell Publishing Ltd.
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Library of Congress Cataloging-in-Publication Data
Rhodes, Karen Helton.
Blackwell’s fi ve-minute veterinary consult clinical companion. Small animal dermatology / Karen Helton Rhodes and
Alexander H. Werner. – 2nd ed.
p. ; cm.
Other title: Five-minute veterinary consult clinical companion
Other title: Small animal dermatology
Rev. ed. of: The fi ve minute veterinary consult clinical companion : small animal dermatology / Karen Helton Rhodes. c2002.
Includes bibliographical references and index.
ISBN 978-0-8138-1596-1 (pbk. : alk. paper) 1. Dogs–Diseases–Handbooks, manuals, etc. 2. Cats–Diseases–Handbooks,
manuals, etc. 3. Exotic animals–Diseases–Handbooks, manuals, etc. 4. Veterinary dermatology–Handbooks, manuals,
etc. I. Werner, Alexander H. II. Rhodes, Karen Helton. Five minute veterinary consult clinical
companion. III. Title. IV. Title: Five-minute veterinary consult clinical companion. V. Title: Small animal dermatology.
[DNLM: 1. Dog Diseases–Handbooks. 2. Skin Diseases–veterinary–Handbooks. 3. Cat Diseases–Handbooks. SF 992.S55]
SF992.S55R46 2011
636.089′65–dc22
2010026561
A catalogue record for this book is available from the British Library.
Set in 10.5/13 pt Berkeley by Toppan Best-set Premedia Limited
1 2011
This text is dedicated to:
■ Steven, as an expression of gratitude for his continued support in every endeavor.
■ Cameron, may she continue to explore her talent and mastery of the written
expression.
■ My parents, Anne and Bill, in appreciation for the gift of an education.
■ And, as always … to Authur I. Hurvitz who, even in his absence, continues to be
my mentor, friend, and muse.
Karen Helton Rhodes
■ To Rita Werner, our family’ s fi rst author, who always believed in me, and to my
mentors who believe in me still.
■ To my siblings who always had faith in me, and to Mike who has faith in me still.
■ And to my children, Jacob and Gregory, who will have faith in me again when they
are no longer teenagers.
Alexander H. Werner
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Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
section 1 Basics
chapter 1 Lesion Description/Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
chapter 2 Practical Cytology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
chapter 3 Diagnostic Culture and Identifi cation (Bacterial and Fungal) . . . . . . . . . 27
chapter 4 Obtaining a Diagnostic Biopsy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
chapter 5 Lesional and Regional Differentials . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
chapter 6 Zoonosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
section 2 Allergic and Hypersensitivity Dermatitis
chapter 7 Atopic Dermatitis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
chapter 8 Contact Dermatitis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
chapter 9 Eosinophilic Granuloma Complex . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
chapter 10 Food Adverse Reactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
section 3 Endocrine Dermatoses
chapter 11 Canine Hyperadrenocorticism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
chapter 12 Feline Hyperadrenocorticism/Skin Fragility Syndrome . . . . . . . . . . . . . 142
chapter 13 Hypothyroidism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
chapter 14 Noninfl ammatory Alopecia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
section 4 Immunologic and Autoimmune Disorders
chapter 15 Canine Familial Dermatomyositis . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
chapter 16 Discoid (Cutaneous) and Systemic Lupus Erythematosus . . . . . . . . . . 179
chapter 17 Drug Eruption, Erythema Multiforme, and Toxic
Epidermal Necrolysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
chapter 18 Granulomatous Sebaceous Adenitis . . . . . . . . . . . . . . . . . . . . . . . . . . 193
chapter 19 Panniculitis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
vii
viii CONTENTS
chapter 20 Pemphigus Complex and Bullous Pemphigoid . . . . . . . . . . . . . . . . . . 203
chapter 21 Sterile Nodular Granulomatous Dermatoses . . . . . . . . . . . . . . . . . . . . 232
chapter 22 Uveodermatologic Syndrome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
chapter 23 Vasculitis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
section 5 Infectious Dermatoses
chapter 24 Bacterial Folliculitis and Emerging Resistant Pyoderma . . . . . . . . . . . . 256
chapter 25 Dermatophytosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
chapter 26 Intermediate and Deep Mycosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
chapter 27 Leishmaniasis: Protozoan Dermatitis . . . . . . . . . . . . . . . . . . . . . . . . . . 294
chapter 28 Malassezia Dermatitis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
chapter 29 Mycobacterial Infections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
chapter 30 Nocardiosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
chapter 31 Viral Dermatoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
section 6 Neoplasias, Cutaneous/Paraneoplastic Dermatoses
chapter 32 Actinic Dermatoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
chapter 33 Canine Pre- and Paraneoplastic Syndromes . . . . . . . . . . . . . . . . . . . . 338
chapter 34 Common Skin and Hair Follicle Tumors . . . . . . . . . . . . . . . . . . . . . . . 351
chapter 35 Epitheliotropic Lymphoma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
chapter 36 Feline Paraneoplastic Syndromes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375
chapter 37 Histiocytosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381
chapter 38 Mast Cell Tumors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
section 7 Parasitic Disorders
chapter 39 Biting and Stinging Insects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 398
chapter 40 Demodicosis (Canine and Feline) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
chapter 41 Sarcoptid Mites (Sarcoptes, Cheyletiella, Notoedres,
and Otodectes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426
section 8 Selected Topics
chapter 42 Acne, Canine and Feline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434
chapter 43 Anal Sac Disorders/Perineal Fistulas . . . . . . . . . . . . . . . . . . . . . . . . . . 437
chapter 44 Behavioral or Self-Injurious Dermatoses . . . . . . . . . . . . . . . . . . . . . . . 443
chapter 45 Disorders of Keratinization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459
chapter 46 Otitis Externa, Media, and Interna . . . . . . . . . . . . . . . . . . . . . . . . . . . 486
chapter 47 Pododermatitis and Claw Disorders . . . . . . . . . . . . . . . . . . . . . . . . . . 515
chapter 48 Superfi cial Necrolytic Dermatitis (Hepatocutaneous Syndrome) . . . . . . 527