Quotation from: Manual of SurgeryWritten by: Alexander Miles and Alexis Thomson |
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_Tertiary Lesions of the Skin and Subcutaneous Cellular Tissue._--The clinical features of a _subcutaneous gumma_ are those of an indolent, painless, elastic swelling, varying in size from a pea to an almond or walnut. After a variable period it usually softens in the centre, the skin over it becomes livid and dusky, and finally separates as a slough, exposing the tissue of the gumma, which sometimes appears as a mucoid, yellowish, honey-like substance, more frequently as a sodden, caseated tissue resembling wash-leather. The caseated tissue of a gumma differs from that of a tuberculous lesion in being tough and firm, of a buff colour like wash-leather, or whitish, like boiled fish. The degenerated tissue separates slowly and gradually, and in untreated cases may be visible for weeks in the floor of the ulcer.
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