PMC8318740_01
Preoperative view of the patient's forearm.
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Physical examination revealed a large, palpable, and painless soft solid mass on the upper half of the right forearm (Figure 1).
CT scans.
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A CT and MRI with contrast demonstrated a well-encapsulated, solid multilobular lesion with lipoid content and the presence of septa (Figures 2 and 3).
MRI images (performed with a 1.5-Tesla unit): (a) axial T1-weighted image; (b) axial T1 fat suppression; (c) sagittal T1-weighted image.
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fig3
A CT and MRI with contrast demonstrated a well-encapsulated, solid multilobular lesion with lipoid content and the presence of septa (Figures 2 and 3).
(a) Intraoperative view of the lesion and (b) residual cavity after the excision of the angiolipoma.
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It was located subcutaneously above the radial artery near the bifurcation of the brachial artery and between the brachioradialis and pronator teres muscles (Figure 4).
Macroscopic appearance of the surgical specimen.
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The removed mass's dimensions were 5 x 5 x 8 cm, and its weight was 68 grams (Figure 5).
Histological examination of the lesion: (a) mature adipose and proliferated vascular tissue (hematoxylin and eosin; magnification x40); (b) hyperplastic vessels with fibrous thrombi (hematoxylin and eosin; magnification x100).
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Histological examination showed mature adipose tissue with a vaguely lobular architecture, due to areas of excess fibrin deposition in the stroma (Figure 6(a)). Additionally, in a few subcapsular areas, there were evident small groups of tiny thin-walled hyperplastic vascular vessels, most of which exhibited the formation of fibrous thrombi in their lumens (Figure 6(b)).