Rectal ulcer in a hemodialysis patient receiving Kayexalate.

Kayexalate can cause severe unrecognized GI lesions. Diagnosis of kayexalate crystals in GI biopsy samples is important. Pathologists and clinicians should work hand in hand.

[Dysphagia and recurrent esophageal stenosis associated with intramural pseudodiverticulosis of the esophagus. A case report].

Intramural pseudodiverticulosis of the esophagus is a rare benign disease of the eosphageal wall, with dilation of the submucosal glands, and the predominant symptom is dysphagia. This disorder may be associated with gastroesophageal reflux, motility disorders, candidiasis and alcoholism. Inflammation, resulting in periductal fibrosis and compression of the duct orifices, may be a causative factor.

[Autoimmune hepatitis and CREST syndrome].

We report the case of an autoimmune hepatitis in a 59-year old woman who was referred for a progressive jaundice. The patient had an history of CREST syndrome. The particularity of this case report is the rare association between these two autoimmune diseases.

Black pigments in the liver related to gold and titanium deposits. A report of four cases.

Black pigments are rarely described in the liver. We report four patients with chronic cholestasis and black pigments described on liver histological examination. Energy-dispersive X-ray analysis identified these black pigments as gold particles in the first three patients and titanium particles in the fourth.