Quality control by tissue microarray in immunohistochemistry.

Aims: An external positive control section is included in each immunohistochemical analysis as a well recognised and validated technique for standardising results. The method is time-consuming and expensive. On the contrary, internal controls are warranted and inexpensive, but their use is only feasible in selected diagnoses.

[Pancreatic metastasis from clear cell renal carcinoma: a clinical case].

Renal cell carcinoma rarely metastasizes to the pancreas. In this report we describe a case of late pancreatic metastases in a seventy-year-old woman, surgically treated 21 years before for renal clear-cell carcinoma. Preoperative staging revealed the presence of four pancreatic lesions.