PMC5471581_01
Colonoscopy images of case  1. Multiple yellowish spots measuring approximately 3 to 5 mm are seen in the rectum (a). Magnifying observation with narrow-band imaging reveals intact pits of the rectal mucosa (b). Indigo-carmine spraying emphasizes the whitish to yellowish color of the lesions (c, d).
CRIGM2017-5975107.001.jpg
PMC5471581_01_CRIGM2017-5975107.001.jpg
fig1
During colonoscopy, multiple yellowish spots measuring approximately 3 to 5 mm were observed in the rectum, in addition to hemorrhoids (Figure 1(a)). Magnifying observation with narrow-band imaging revealed that the pits of the rectal mucosa were intact (Figure 1(b)). Indigo-carmine spraying emphasized the whitish to yellowish color of the lesions (Figures 1(c) and 1(d)).
PMC5471581_02
Colonoscopy images of case  2. A whitish plaque of 4 mm in diameter in the rectum is seen (a). Narrow-band imaging (b) and indigo-carmine spraying (c) show whitish lesions more clearly.
CRIGM2017-5975107.002.jpg
PMC5471581_02_CRIGM2017-5975107.002.jpg
fig2
Colonoscopy showed a whitish plaque of 4 mm in diameter in the rectum (Figure 2).
Pathological image of case  2. Biopsy examination reveals massive deposition of xanthoma cells within the rectal mucosa.
CRIGM2017-5975107.003.jpg
PMC5471581_02_CRIGM2017-5975107.003.jpg
fig3
Biopsy examination revealed massive deposition of xanthoma cells within the rectal mucosa (Figure 3), leading to the diagnosis of rectal xanthoma.