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REPORT OF A CASE

HARRY L. ARNOLD, Jr., M.D.

Arch Derm Syphilol. 1939;40(3):386-389.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Masson's¹ theory that many if not all of the cellular and pigmented nevi have their origin in the peripheral neuroglia or Schwann cells has been receiving increasingly wide acceptance in recent years.² In his original paper on the subject Masson¹ reaffirmed Soldan's dictum that pigmented nevi were neuromas of the epidermal and dermal portions of the tactile nerves. An illustration accompanying that paper showed a phenomenon common to both Masson's and Unna's theories of the histogenesis of these lesions, that is, the process Unna³ had previously designated as Abtropfung, which consisted of the extrusion from the epidermis into the corium of spheroidal nests of large cells with pale-staining cytoplasm. Unna called these altered basal cells; Masson expressed the belief that they were altered cells of the sheath of Schwann. In their earlier stages of differentiation Masson designated them cellules claires, and he and others² have . . . [Full Text PDF of this Article]

Author Affiliations
Instructor in Dermatology and Syphilology ANN ARBOR, MICH.

Studies and contributions from the Department of Dermatology and Syphilology, University of Michigan Medical School, service of Dr. U. J. Wile.

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