Book excerpt: This book concisely but thoroughly summarizes advances in understanding of the spectrum of orbital inflammatory disorders that have resulted from recent basic and clinical research and explains their significance for clinical practice. The full range of inflammatory disorders is considered, including bacterial and fungal infections, IgG4-related orbital inflammation, sarcoidosis, Sjögren’s syndrome, Wegener’s granulomatosis, adult xanthogranulomatous disease, thyroid eye disease, and Langerhans cell histiocytosis. For each disorder, the etiology, clinical manifestations, imaging characteristics, differential diagnoses, and management options are described and discussed. The authors comprise a panel of experts in the field who address the subject in a readable style with the aid of informative illustrations. This reference book will be of value in daily practice for ophthalmology residents, general ophthalmologists, oculoplastic and orbital surgeons, ocular oncologists, otolaryngologists, and neurosurgeons. It will also be a useful source of information for those preparing for exams or wishing to update their knowledge of these disorders