A rare case of occult gastrointestinal bleeding: a submucosal colonic lipoma mimicking a malignant tumour
Jos\u00e9 A Guirola Ort\u00edz, Guillermo Mu\u00f1oz Gonz\u00e1lez, Victoria Mayoral Campos, -Jos\u00e9 L de Benito-Ar\u00e9valo, Beatriz Carro Alonso