Fig. 11. Tandem trocar technique in a 60-year-old female patient with a retrogastric lesser sac pseudocyst. Initial access into the cyst was gained using a 15-cm-long 20-gauge needle. After the position of the needle tip was confirmed inside the pseudocyst, a 10 French multipurpose drainage catheter was advanced in tandem with the needle to the measured depth and a pigtail formed within the pseudocyst.

Gastrointestinal Intervention 2013;2:36~46 https://doi.org/10.1016/j.gii.2013.03.001

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