Impact of delayed and prolonged fixation on the evaluation of immunohistochemical staining on lung carcinoma resection specimen.

Pre-analytical factors, such as fixation time, influence morphology of diagnostic and predictive immunohistochemical staining, which are increasingly used in the evaluation of lung cancer. Our aim was to investigate if variations in fixation time influence the outcome of immunohistochemical staining in lung cancer. From lung resections, specimen with tumor size bigger than 4 cm, 10 samples were obtained: 2 were put through the standard fixation protocol, 5 through the delayed, and 3 through the prolonged fixation protocol.

[Collagenous sprue: secondary or independent from celiac disease?].

Collagenous sprue is a rare disease that goes with persistent diarrhea, weight loss and bad absortion, because it affects the small intestine, mainly duodenum and proximal jejunum. Diagnosis is made by having clinical signs and histological proof of atrophy and subepitelial deposit of collagenous material. Its etiology is not known completely, it is proposed that the origin is autoimmune because its relationship with celiac disease.