CHONDROID SYRINGOMA (BENIGN MIXED TUMOR OF SKIN) HAVING SMALL, TUBULAR LUMINA AND INDISTINCT MARGINS
Many chondroid syringomas having small, tubular lumina have sharply delimited margins, but occasional examples, such as this one, have margins that are less distinct. However, this is not evidence of aggressive behavior.

Biopsy of a subcutaneous mass from the suprapubic area of an elderly female. The character of the tumor was the same in the subsequent excisional specimen.
 
Scanning power view.
Medium power view of the junction of the tumor and the subcutis (left side of the scan power picture). The tumor replaces adipose tissue to a minimal degree in this margin.

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