Few congenital anomalies of the nervous system are amenable to surgical intervention. In a small number of cases such anatomic malformations are compatible with normal or near normal function until changes in growth produce locomotive or sphincteric disturbances or both. A review of the records of 442 patients with spina bifida occulta seen at the Mayo Clinic in the past decade disclosed six (Cases 1 to 6) with tight filum terminale.
Tulpuis in 1641 was the first to use the term "spina bifida." Mention of such anomalies is found, however, as early as the writings of Hippocrates.* Since then the ebb and flow of thought on this most perplexing of biologic phenomena is wondrous, but very little concerns the anchoring filum terminale.Fuchs † coined the word "myelodysplasia" to explain the relationship of spina bifida, enuresis, and deformities of the feet. De Vries3 suggested the use of