Endoscope disinfectant-induced colonic pseudolipomatosis: case series of a rare condition

Figures & data

Table 1. Clinical and endoscopic characteristics of patients.

Patient	Age (years)	Sex	Medical history	Indication of colonoscopy	Site of the lesion	Extent of the lesion	Previous colonoscopy
1	53	M	–	Colonic diverticulitis	Right colon	0.5–1 cm	No
2	79	F	Hypertension	Constipation	Right colon (Caecum)	4–5 cm	No
3	68	F	Lupus Hypertension Diabetes	Iron deficiency	Left colon	8–10 cm	No
4	34	F	Basedow's disease	Iron deficiency anemia	Right colon	4–5 cm	No
5	62	F	Coronary artery disease Diabetes	Iron deficiency anemia	Right colonic flexure	5–6 cm	No
6	66	M	Atrial fibrillation Hypertension	Constipation Rectal bleeding	Transverse colon	10–12 cm	6 months earlier
7	50	M	–	Rectal bleeding	Transverse colon	5–6 cm	24 h earlier
8	57	F	–	Constipation	Left colonic flexure	8–10 cm	No

Figure 1. Endoscopic aspects.

(A) Slightly elevated whitish–yellow plaques. (B) Confluent plaques creating a pseudomembranous aspect, sometimes surrounded by erythematous colonic mucosa (blue arrows). (C) Formation of plaques rapidly after the appearance of whitish foamy fluid.

Figure 2. Histological examination.

(A) Numerous optically empty vacuoles of variable sizes (red arrows) in the lamina propria and the muscularis mucosa, sometimes confluent (green arrow), intermingled with inflammatory cells (hematoxylin-eosin 200×). (B) The optically empty vacuoles repress and distort the cryptic contours (hematoxylin-eosin 400×).