case_images: PMC2799975_01
case_images: Prograsp Forcep with loosened bolt (encircled).
case_images: ymj-51-148-g001.jpg
case_images: PMC2799975_01_ymj-51-148-g001.jpg
case_images: F1
case_images: As the forcep itself could not be removed, the trocar with the instrument was removed in whole unit form, leading to the discovery of the loosened bolt which had impeded the removal of the forcep (Fig. 1).