case_images: PMC10784711_01
case_images: Brain MRI findings.. Brain MRI revealed mild atrophy of the cerebrum and high signal levels in the cerebral cortex and basal ganglia on DWI.
case_images: cureus-0016-00000052082-i01.jpg
case_images: PMC10784711_01_cureus-0016-00000052082-i01.jpg
case_images: FIG1
case_images: Brain MRI revealed mild atrophy of the cerebrum and high signal levels in the cerebral cortex and basal ganglia on DWI (Figure 1).
case_images: Main components of Tumguide .
case_images: cureus-0016-00000052082-i02.jpg
case_images: PMC10784711_01_cureus-0016-00000052082-i02.jpg
case_images: FIG2
case_images: Tumguide  system.
case_images: cureus-0016-00000052082-i03.jpg
case_images: PMC10784711_01_cureus-0016-00000052082-i03.jpg
case_images: FIG3
case_images: TOP Co., Tokyo, Japan) and anchored with a stopper at a position sufficiently far from the end of the tube to ensure that the tip would not poke out beyond it. The Tumguide  fiber was connected to a Tumguide  light source, and a stopper was fitted to prevent the two from coming apart (Figure 3A). The power was turned on, and it was confirmed that the BT light was blinking at the tip (Figure 3B).
case_images: Findings that the tip of the Tumguide  fiber exists in the stomach.
case_images: cureus-0016-00000052082-i04.jpg
case_images: PMC10784711_01_cureus-0016-00000052082-i04.jpg
case_images: FIG4
case_images: The BT light was observed above and to the left of the umbilicus, indicating that the tip had reached the inside of the stomach (Figure 4A). At this point, the insertion length was 50 cm, and when the tube was pushed further in, at an insertion length of 55 cm, the BT light was observed above and to the right of the umbilicus, indicating that the tip had moved to the pyloric side of the stomach and suggesting that the end of the nasogastric tube was within the stomach (Figure 4B).