This book was a collection of unusual medical cases seen by the author in his medical practice and other physicians he consulted. I'm not certain of the publication date of the book, but it seemed like most of the cases were from the 1960s, so there was a bit of a dated feel to the book. That said, the author focused almost entirely on the case at hand, with limited philosophy and tangential stories, unlike the books I've read by Oliver Sacks. In some of the cases, such as the lady with the red face who improves at the hospital and the little boy suffering from seizures of unknown origin, I knew exactly what was wrong with them, not because I have extensive medical training, because I don't, but because both diagnoses are perhaps more common these days and I've read about others real and fictional, who received the same diagnoses. Others, like the title case, were medical mysteries whose roots I was less familiar with.
I read this book at the gym, and the chapters were of a good length to keep me engaged in both the reading and the workout, but not so long that I found my mind and body tiring. I would read other books by this author on a similar subject because I did learn from it. As I got the feeling that he was an older doctor near the end of his career, his other books might be too dated if they were based on contemporary subjects at the time he wrote them.