The Pyloric Sphincteric Cylinder in Health and Disease

About this publication

The Pyloric Sphincteric Cylinder in Health and Disease by AD Keet M.B. Ch.B. (Univ. of Cape Town), M.D. (Univ. of Amsterdam), Ph.D. (Med.) (Univ. of Stellenbosch), was first published by Springer-Verlag (Berlin Heidelberg) in 1993, under ISBN 3-540-55814-4 Springer-Verlag Berlin Heidelberg New York and ISBN 3-387-55814-4 Springer-Verlag New York Berlin Heidelberg. Springer-Verlag returned full copyright to Dr. Keet after the decision was made to publish the work in full on the Internet with the aim of making it easily accessible world-wide for research purposes.

It is seen that many physiological events in which the pylorus is implicated (e.g. gastric motility, trituration, emptying of liquids and solids, duodeno-gastric reflux), may be elucidated if consideration is given to the anatomy of the stomach as described by Cunningham (1906), Forssell (1913) and Torgersen (1942). The same holds true for pathological conditions, e.g. gastric and duodenal ulceration, some types of gastritis, diabetes mellitus and pyloric carcinoma.

The findings obtained at gastroscopy, ultrasonography, manometry, radionuclide scintigraphy, myoelectric activity and roentgenology are discussed and compared. The concept of a sphincteric cylinder (as opposed to a sphincteric ring) at the pylorus is developed.

Faculty of Medicine, University of Stellenbosch The project originated in and was managed from the Department of Roentgenology, Tygerberg Hospital, which is the academic hospital of the Faculty of Medicine, University of Stellenbosch, South Africa. Roentgenology (i.e. barium meal or upper gastrointestinal series) was employed as an investigative rather than a diagnostic tool. In this particular context roentgenology has certain advantages over endoscopy. This is not denying the fact that at present endoscopy is the investigation of choice in upper gastrointestinal pathology.

The author would like to thank Christiaan Keet and Sharon Hastie (London) and Ilse van Vuuren (Cape Town) for the time and effort spent in publishing this treatise on the Internet. Without them it would not have been possible.

The Internet edition of The Pyloric Sphincteric Cylinder in Health and Disease was edited and published in 1998 by PLiG.


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The Editors of the following journals have kindly given permission to reproduce illustrations, tables and in some instances paragraphs previously published in the volumes indicated:

A.M.A. Archives of Pathology 1956, Vol. 61 pp 20-23, Fig. 1; Acta Radiologica 1957, Vol. 48, pp 413-424, Fig. 1D, 2B, 3B, 9, 10; Acta Radiologica 1958, Vol. 50, pp 413-429; Acta Radiologica 1962, Vol. 57, pp 31-44, Fig. 13; American Journal of Roentgenology, Radium Therapy and Nuclear Medicine 1971, Vol. 113, pp217-228, Fig. 3, 4, 5, 6, 7, 8; American Journal of Gastroenterology 1978, Vol. 69, pp 144-148, Fig. 1; South African Medical Journal 1953, Vol. 27, pp 117-123; South African Medical Journal 1960, Vol. 34, pp 881-884; South African Medical Journal 1974, Vol. 48, pp 441-448, Fig. 1, 2; South African Medical Journal 1982, Vol. 61, pp 78-81, Fig. 1, 2, 3, 4; South African Medical Journal 1982, Vol. 62, pp 15-18, Fig. 2, 3, 4, 5; South African Medical Journal 1982, Vol. 62, pp 329-333, Fig. 1, 2, 3; South African Medical Journal 1984, Vol. 66, pp 740-742, Fig. 1, 2, 3.

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