Overgrowth Syndromes presents a broad yet in-depth discussion of child ren who are large at birth or experience excessive postnatal growth or some combination of increased weight, length, and head circumference. Many of these syndromes are associated with an increased frequency of tumors. The book is important because of the ever-increasing number o f newly identified overgrowth syndromes and the rapid progression of m olecular knowledge of these conditions. It covers: Beckwith Wiedemann syndrome, Simpson-Golabi-Behmel syndrome, Sotos syndrome, Proteus synd rome, Bannayan-Riley-Ruvalcaba syndrome, Klippel-Trenaunay syndrome, n eurofibromatosis, and fragile X syndrome, among other topics. The boo k is encyclopedic in scope. It will be of value to pediatricians, medi cal geneticists, oncologists, hematologists, surgeons, pathologists, r adiologists, dermatologists, nephrologists, and molecular biologists.