PMC6282447_01
Clinical image (A) and magnetic resonance image (B) of patient 1, illustrating SCC overlying patent AVF on edematous arm. Long arrow delineates border of SCC, indistinct due to edema and lack of contrast. AVF, Arteriovenous fistula or graft; SCC, squamous cell carcinoma.
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PMC6282447_01_gr1.jpg
fig1
A 74-year-old incarcerated man presented with an enlarging 4 x 3-cm SCC located over a radiocephalic AVF on his left forearm (Fig 1, A). Magnetic resonance imaging (MRI) without gadolinium (due to low glomerular filtration rate) showed a superficial skin nodule, although evaluation of its extension was limited by lack of contrast and edema (Fig 1, B).
PMC6282447_02
A, Clinical picture of basal cell carcinoma (arrows) of patient 2 before intraoperative AVF ligation and excision. B, Magnetic resonance image demonstrates a predominantly cutaneous and subcutaneous mass with proximity but no invasion of fistula. AVF, Arteriovenous fistula or graft.
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fig2
AVF (Fig 2, A). An MRI revealed no vessel invasion (Fig 2, B).
PMC6282447_03
PMC6282447_04
Clinical picture of SCC of patient 4 (circled). The border of the brachial artery proximal to the arteriovenous fistula or graft is delineated by red dashed lines. Patient details have been obscured. SCC, Squamous cell carcinoma.
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fig3
A 71-year-old woman with a history of multiple KCs and a renal transplant in 2011 presented with a 1-cm SCC on her left anterior shoulder overlying the proximal segment of a previously utilized functional brachiobasilic AVF placed in 2008 (Fig 3).