case_images: PMC10859003_01
case_images: Clinical photograph displaying multiple scars overlying a fairly round, huge mass. The mass, measuring 18cm x 12cm, is located on the right upper back and abuts the midline.
case_images: cureus-0016-00000052154-i01.jpg
case_images: PMC10859003_01_cureus-0016-00000052154-i01.jpg
case_images: FIG1
case_images: Examination at presentation revealed a fairly round mass located in the back, 5 cm below the right scapula and abutting on the midline; it measured 18cm x 12cm x 6cm in dimension (Figure 1).
case_images: Photomicrograph depicting the proliferation of variably sized blood vessels intermixed with adipocytes (indicated by black arrows). Stained with H&E, at x200 magnification.
case_images: cureus-0016-00000052154-i02.jpg
case_images: PMC10859003_01_cureus-0016-00000052154-i02.jpg
case_images: FIG2
case_images: Microscopic findings showed a benign vascular lesion composed of various haphazardly arranged large venous, cavernous, and capillary-sized vessels lined by bland endothelial cells, with infiltration into the fibrocollagenous stroma, skeletal muscles, and adipocytes (Figure 2).
case_images: Photomicrograph displaying a large central thick-walled vein with herniation of a wall segment into the lumen (indicated by a blue arrow). Additionally, multiple small vessels are visible in the wall of the large vein (indicated by black arrows). Stained with H&E, at x400 magnification.
case_images: cureus-0016-00000052154-i03.jpg
case_images: PMC10859003_01_cureus-0016-00000052154-i03.jpg
case_images: FIG3
case_images: Within the walls of these veins are lobules of clustered capillaries (Figure 3).
case_images: Back of the patient during post-operative follow-up at the surgical outpatient clinic.
case_images: cureus-0016-00000052154-i04.jpg
case_images: PMC10859003_01_cureus-0016-00000052154-i04.jpg
case_images: FIG4
case_images: The patient had an unremarkable post-operative hospital recovery, and he is currently being followed up on an outpatient basis (Figure 4).