Micrograph of<unk> , with the characteristic mucosal lipofuscin-laden macrophages (brown).<unk> , also pseudomelanosis<unk> , is a disorder of pigmentation of the wall of the colon, often identified at the time of colonoscopy. It is benign and may have no significant correlation with disease. The brown pigment is lipofuscin in macrophages, not melanin.
Melanosis coli
Hydroa vacciniforme
Tinea imbricata
Ichthyosis bullosa of Siemens
Phytophotodermatitis
Demodicosis
Granuloma faciale
Prurigo simplex