Case of the month - February 2007
Special stains
PAS (left) and AB/PAS (right) staining of tumour secretion
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Patchy positive immunostaining of nested area with CK 5/6
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Patchy positive immunostaining of papillary area with CK 5/6
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Patchy weak positive nuclear staining for ER
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Entrapped benign elements show positive basal layer nuclear staining with P63
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- The tumour was also S100 positive and gross cystic disease fluid protein negative