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M. A. COWAN, MB, MRCP

Arch Dermatol. 1964;89(4):562-568.

Abstract
The innervation of the skin was studied in ten patients with lichen simplex chronicus using an improved silver impregnation technique. Significant changes were present in all cases, and consisted of an increase in the rate of "neural turnover" and a proliferation of Schwann cells. These Schwann cells made up a large proportion of the cellular infiltrate seen in routine histological preparations. Clinically normal skin from the same patients showed similar, though less marked, abnormalities in several instances. The neurohistological picture could be distinguished easily from that in psoriasis.

Author Affiliations
LONDON, ENGLAND

From Departments of Dermatology, United Oxford Hospitals, England, and University of Oregon Medical School, Portland, Ore.

Present address: St. John's Hospital for Diseases of the Skin, Lisle Street, Leicester Square, London, WC 2, England.

Footnotes
This investigation was supported (in part) by the US Army Research and Development Command under contract DA-49-139-MD-2184; and by a PHS training grant, 5 T1 AM 5300-3, from the National Institute of Arthritis and Metabolic Diseases, Public Health Service.

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