Abstract
Pseudotubercles, due to the introduction of foreign material into the skin are of especial interest to dermatologists, not because the tumors themselves carry a serious prognosis, but because so often they are mistaken for the more serious granulomas and neoplasms. True tumor formation in the skin found pathologically to be foreign body tubercles has followed the subcutaneous introduction of paraffin, liquid petrolatum and camphor oil. REVIEW OF THE LITERATURE As early as 1906, Heidingsfeld1made an extensive microscopic study of the changes resulting from subcutaneous injection of paraffin. This author states that: The distinguishing and characteristic pathologic changes are the Swiss-cheese-like general appearance under the low powers of the microscope, the alveolar-like distribution of the inflammatory products and the abundance of giant cells.... The reaction resembles in its general appearance a granuloma, much like that of an early acute tuberculosis before caseation takes place. In more recent years, reports
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