French's Index of Differential Diagnosis, 11th Edition focuses on treatise on the application of differential diagnosis to all the main signs and symptoms of diseases. The book covers surgery, gynecology, ophthalmology, dermatology, and neurology. The manuscript first ponders on anemia, angioma, antisocial behavior, anxiety, ascites, ataxia, abnormal blood pressure, bradycardia, foulness of breath, and pain in breast. The book then discusses confabulation, cramps, cyanosis, cystinuria, delusions, dementia, diarrhea, diplopia, depression, erythema, and inflammation of eye. The publication takes a look at indigestion, impotence, insomnia, jaundice, keloid, marasmus, muscular atrophy, nasal obstruction, nausea, nasal discharge, swelling of neck, obesity, palpitations, and pelvic swelling. The manuscript also reviews loss of weight, vertigo, vomiting, defects of vision, vaginal discharge, vaginal swelling, sore throat, pain in tongue, trismus, grinding of teeth during sleep, and snoring. The book is a vital reference for researchers wanting to study differential diagnosis.