Lipoma of the Thumb: Spindle Cell Subtype

<div>Ultrasound of the ulnar aspect of the thumb showing a well defined mildly hyperechoic lesion measuring <svg height="8.55521pt" id="M1" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -8.34882 86.0733 8.55521" width="86.0733pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z" id="g113-50"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="480" vert-adv-y="480"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,6.24,0)"><path d="M113 -12C146 -12 170 11 170 46C170 78 146 103 114 103S58 78 58 46C58 11 82 -12 113 -12Z" id="g113-47"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="228" vert-adv-y="228"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,9.204,0)"><path d="M285 378C315 398 338 416 353 432C373 451 384 474 384 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vert-adv-y="480"></glyph.data></g></svg> cm abutting the ulnar collateral ligament, which is otherwise intact. No internal flow was seen on Doppler.</div>

Case Reports in Orthopedics

Lipoma of the Thumb: Spindle Cell Subtype

Figure 1