PMC3754407_01
Figure 1: Balloon trocar
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F1
 As for STTE, the anus was gently dilated, and a lubricated 11mm balloon trocar was introduced into the anal canal (Fig. 1, 2).
Figure 2: Trocar positioning for the procedure
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F2
 As for STTE, the anus was gently dilated, and a lubricated 11mm balloon trocar was introduced into the anal canal (Fig. 1, 2).
Figure 3: Showing good visibility
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F3
The lesion was localized, excised using scissors and monopolar coagulation (Fig. 3).