Literature citations

Usefulness of S100P in diagnosis of adenocarcinoma of pancreas on fine- needle aspiration biopsy specimens.

Even though the cytologic criteria for pancreatic ductal adenocarcinoma (PDA) on fine-needle aspiration biopsy (FNAB) specimens have been well defined, a diagnostic challenge is still present. We immunohistochemically evaluated the diagnostic value of S100P on cell-block and/or smear preparations in 58 cases of FNAB specimens of the pancreas. The 58 cases were divided into 4 groups: 1, 32 cases of PDA; 2, 6 cases with an atypical or "suspicious" diagnosis; 3, 14 cases of benign or reactive ductal epithelium; and 4, 6 cases of endocrine tumor. Positive immunoreactivity for S100P was observed in all cases in groups 1 and 2, whereas only 1 of 14 cases in group 3 was positive for S100P. All cases in group 4 were negative for S100P. S100P is a sensitive and specific marker for the detection of PDA on FNAB specimens on cell-block and smear preparations.

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