Mostly the tumour remains undiffeentiated but, occasional differentiated cells formed ducts. Cell line from undifferentiated pancreatic ductal Ca.

Medulla: strong cytoplasmic positivity in ascending distal tubules and in collecting tubule intercalated cells.

Strong positivity in ascending distal tubule and in collecting tubules’ intercalated cells.

Hair follicle and associated sebaceous glands in dermis

Proteinase K digestion was required ( HIER did not work)

Positive Z discs in fly muscles