The cutaneous fibromas were divided by Unna1 into two groups: the keloids and the simple fibromas. Keloids are relatively common, are well known clinically and differ from the fibromas chiefly in the fact that they recur on excision and are the result of a constitutional peculiarity of the entire cutaneous fibrous system. The simple fibromas, on the other hand, exclusive of the neurofibromas, are comparatively rare cutaneous growths. They are solitary or multiple, hard, fibrous, sessile tumors situated subepidermally, arising spontaneously or following slight, but insignificant trauma.
These small growths undoubtedly are observed more frequently than the scanty literature on the subject would indicate. Almost all of the standard dermatologic texts in English, German and French mention the condition, but they discuss it in only a few sentences.
For a number of years I have been interested in this subject, not because of its clinical importance, but because
MICHELSON HE. NODULAR SUBEPIDERMAL FIBROSIS. Arch Derm Syphilol. 1933;27(5):812–820. doi:10.1001/archderm.1933.01450040821012
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