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This is a beautiful and inexpensive volume with 174 pages and 197 figures covering the tumors of the peripheral nervous system. This fascicle begins with a clear, light and electron microscopic definition of the nerve fiber and its component parts. The authors have spared no effort in making specific definitions of the layers, sheaths, and tissues which make up the peripheral nerve trunks. Their illustrations are well chosen. They consider that the perineurial cells and Schwann cells are identical and suggest that the single name, Schwann cell, be used for both suggesting that Schwann cells synthesize collagen as well as producing the basement membrane in myelin surrounding the axon. This view is not documented adequately.
They maintain the division between the solitary schwannoma and the solitary neurofibroma but use the synonym, solitary nerve sheath tumor for both. They point out that whatever changes are found in either tumor may be