Canine Dermatopathology is a comprehensive resource for veterinarians, clinicians, students, and faculties that delves into the dermatological disorders in dogs. As dermatology constitutes a significant portion of daily caseloads in small animal practice, this book emerges as an invaluable tool in providing a logical and sequential approach to tackling the challenges presented by various skin conditions.

The canine skin, being the largest organ with multifaceted functions, demands a nuanced understanding. This book recognizes the complexity of dermatological cases and emphasizes the importance of a structured diagnostic approach.

In addition to addressing common health problems in pet animals, particularly dogs, the book explores a myriad of aetiologies, including ecto/endoparasitic infestations, contact allergens, physical causes, radiation, infectious causes (bacterial, viral, fungal infections), immunological causes, nutritional/metabolic disorders, and endocrine imbalances. It also emphasizes the prevalence of secondary infections and guides veterinarians in successfully managing dermatological cases.

The book highlights the significance of specific tests, such as skin scrapings, fungal and bacterial culture, cytological evaluation, and skin biopsy. Cytology emerges as a highly efficient and valuable examination that facilitates rapid lesion evaluation and guides subsequent diagnostic steps. Histopathology, when coupled with clinical findings, leads to definitive diagnoses, especially in cases involving neoplastic nodules or conditions with poor responses to previous therapy.

With a focus on cytology, gross morphology, histopathology, and immunohistochemistry, the book equips veterinarians with the knowledge needed for accurate and early diagnosis and treatment of various skin conditions in dogs. It serves as both a ready reckoner and an educational tool for the readers.

N. Pazhanivel, M.V.Sc., Ph.D., M.A. (Public Administration), PGDEVP., Diplomate ICVP., FASAW, ICMR DHR IF, and Professor of Pathology, Madras Veterinary College, Chennai-600007. His area of research include oncology, avian oncogenic viruses, avian pathology, cytopathology, histopathology and toxicopathology. He has published 247 research articles (International -58; National-189). He has presented 250 research papers (International-63; National-187). He has received 34 awards. He has published 3 books and 40 book chapters. He has completed 5 projects and currently 2 projects are handling. He has completed Post-Doctoral Fellowship Research Training at Pennsylvania State University, USA in 2020. At present, he is the Secretary, Indian College of Veterinary Pathologists (ICVP) from 2020

C. Balachandran was born on 28.07.1957 in Mannargudi town of Tiruvarur District, Tamil Nadu. He obtained B.V.Sc., M.V.Sc. and Ph.D. (Veterinary Pathology) degrees from Madras Veterinary College. He started his career at Namakkal in 1980 and promoted as Associate Professor in 1988 and Professor in 1996. He served  as  Vice-Chancellor of Tamil Nadu Veterinary and Animal Sciences University (TANUVAS) for three years from 09-04-2018.He also served as Registrar of TANUVAS and as the Dean, Madras Veterinary College. He has published about 400 scientific articles including 73 articles in International journals. He was instrumental in introducing cytological diagnosis of disease in animals. His areas of research interests are avian diseases, cancer biology and indigenous medicinal effects. He has published about 50 popular articles. He served as Editor, Kalnadai Kathir, a TANUVAS Tamil Popular Magazine. He has about 90 awards to his credit. Notable Awards: University gold medal for the best thesis in avian diseases, Fellow of FAO, IAVP, National Academy of Veterinary Sciences and Academy of Science for Animal Welfare, Tamil Nadu State Scientist Award.

Ganne Venkata Sudhakar Rao is currently working as Professor and Head, Department of Veterinary Pathology, Madras Veterinary College, of Tamil Nadu Veterinary and Animal Sciences University (TANUVAS), Chennai - 600 007. He was born on 12.06.1964 in Thotlavalluru, Krishna District, Andhra Pradesh. He obtained B.V.Sc.& AH degree from College of Veterinary Science, APAU, Tirupati (1986), M.V.Sc. in Veterinary Pathology from Madras Veterinary College (MVC), Tamil Nadu Agricultural University (TNAU) 1989 and Ph.D. in Veterinary Pathology from TANUVAS (1997). He started his career as Assistant Professor at Veterinary College and Research Institute (VCRI) Namakkal in 1990. He was the recipient of the Associate ship of the National Academy of Sciences, United States of America and worked at the NIOSH – CDC from 2000 to 2002. He worked as Associate Professor at MVC from 2002 to 2005 and as Associate Professor and Head at the Veterinary University Training and Research Centre, Karur in 2005 and at MVC from 2006 to 2009. He worked as Professor at MVC from 2009 to 2012 and 2015 to 2017 and as Professor and Head at Farmers Training Centre, Kancheepuram from 2012 to 2015.  He has published several articles in scientific and popular journals and prepared teaching manuals. He was actively involved in conducting various scientific seminars and training programs for veterinarians. He has guided several students for M.V.Sc and Ph.D in Veterinary Pathology.

D. Sumathi, PhD., PGDRM is currently working as Assistant Professor at Department of Veterinary Clinical Medicine, Madras Veterinary College, Chennai-7. She has 18 years of teaching experience, 11 years of research experience and 13 years of extension experience. Her areas of specialization are Small Animal Internal Medicine (Gastroenterology & Hepatology), Small Animal Ultrasonography, Small Animal Critical Care and Small Animal Dermatology. She has completed her Postgraduate diploma in Regenerative Medicine from Madras Veterinary College. She has completed 3 research schemes as Co-Principal Investigator. She has completed a student TNSCST project from 2014-2015. She has published 30 research papers. She has received 11 best clinical presentation awards at national level. She has developed four E-courses. She was involved in UG teaching for 12 years and PG Teaching for 6 Years. She has acted as chairman for 4 postgraduate students and as a chairman for 1 PhD student is under progress. She has acted as chairman for 15 postgraduate diploma students in 3 subjects from 2011 to 2015.  She was co-organizing Secretary in International workshop on working Dogs during 2014. She was course director for ICAR CAFT (1 completed each in 2014 & 2015). She has acted as Nodal Officer for Indian Immunological Training in the year 2014. She was co-coordinator in ECM and DUS PG Diploma Program.

He is a Veterinary Pathologist currently working as Assistant Professor in the Department of Veterinary Pathology, VCRI, Orathanadu, Tamil Nadu Veterinary & Animal Sciences University. He has 15 years of expertise in Laboratory Animal Management and Animal welfare regulations. He has served as Laboratory Animal Veterinarian under DST Animal Facility Project and was involved in the establishment of the Laboratory Animal Facility including the Transgenic facility at the Central Animal Facility, SASTRA University including CPCSEA registration of the facility and maintenance of CPCSEA registration for the purpose of experimentation, breeding and sales of laboratory animals. He has also established the Histopathology and Clinical Pathology by 2008 exclusively for laboratory animals. Since then, he has been primarily, a lab animal Veterinarian / Study director / Pathologist and was involved in the conduct of 300 + laboratory animal experiments including toxicology and pharmacology studies.

He has been the Member Secretary of the IAEC, SASTRA and served as IAEC member as Veterinarian Incharge of the Facility for 11 years and have conducted 33 IAEC meetings. In 2014, he got the facility certified under NABL for Biological Testing. He has more than 14 years of experience in preclinical research at various levels as Lab Animal Veterinarian, Study Pathologist, Study director and Deputy Technical Manager. At the Madras Veterinary College, TANUVAS, he was involved in the laboratory animal experiments conducted by the postgraduate and doctoral students of the Department of Veterinary Pathology, MVC, TANUVAS.

R. Saahithya, M.V.Sc., Assistant Professor of Veterinary Pathology, Veterinary College and Research Institute, Salem-636 112. She has obtained B.V.Sc., and M.V.Sc. (Veterinary Pathology) degrees from Madras Veterinary College, Chennai – 600 007 during 2013 and 2018 respectively. She did her externship at Virginia Maryland Regional College of Veterinary Medicine, Virginia Tech, USA during 2013. She was awarded with 8 gold medals and secured university third in undergraduate degree. She was awarded with 5 gold medals and secured university first in postgraduate degree in Veterinary Pathology. She was the best female outgoing student in both UG and PG curriculum in the University. She has cleared ICAR NET exam in 2018.

She started her career when she was awarded with Graduate Assistantship to serve the University from 2014. Her postgraduate research work was related to Experimental Oncology. She has published 30 scientific articles in peer reviewed journals. She has been awarded with 5 awards for best presentation at various conferences.

Disorders of Infectious and Non-Infectious Origin

1. Acral Lick Dermatitis (Lick granuloma) 2. Atopic Dermatitis 3. Superficial Pyoderma 4. Superficial Pustular Dermatitis 5. Bacterial Granulomatous Dermatitis (Bacterial granuloma) 6. Mycobacterial Granuloma 7. Hook Worm Dermatitis 8. Flea Bite Hypersensitivity (Canine Flea Allergic Dermatitis, Flea Bite Dermatitis) 9. Pemphigus Foliaceous 10. Dysplastic Diseases of Adnexae 11. Dysplastic Diseases of Adnexae 12. Demodicosis (Demodectic Mange/ Demodectic Acariasis) 13. Crust 14. Scales 15. Ulcers 16. Dermatophytosis 17. Cheyletiellosis (Cheyletiella dermatitis) 18. Hair Cycle Disorders of Endocrine Origin 19. Canine Zinc Responsive Dermatosis 20. Acanthosis Nigricans 21. Eosinophilic Granuloma (Canine Collagenolytic Granuloma) 22. Sertoli Cell Tumor Associated Skin Disease 23. Malassezia Dermatitis

Cutaneous Neoplasm – Epithelial Tumors

24. Papilloma 25. Squamous Cell Carcinoma 26. Basal Cell Carcinoma (Trichoblastoma) 27. Sweat Gland Adenoma and Adenocarcinoma 28. Sebaceous Gland Adenoma and Adenocarcinoma 29. Ceruminous Gland Adenoma and Adenocarcinoma 30. Perianal Gland Adenoma  and Adenocarcinoma 31. Fibroma 32. Fibrosarcoma 33. Lipoma 34. Liposarcoma 35. Haemangioma 36. Haemangiosarcoma 37. Hemangiopericytoma

Cutaneous neoplasm – Round cell tumors

38. Mast Cell Tumour 39. Histiocytoma 40. Cutaneous Lymphoma (Mycosis Fungoides, Epitheliotropic T-Cell lymphoma) 41. Cutaneous Plasmacytoma 42. Melanoma 43. Transmissible Venereal Tumour (Sticker Tumour, Canine Venereal Granuloma)