Fig. 3From: Elevated tumor markers in a benign lung diseaseIHC staining of CA19-9 of PS tissues: CA19-9 was strongly expressed in PS tissues and mainly in bronchial mucus and alveolar space. A–D Represented the expression of CA19-9 in specimen from the 4 patients with a serum CA19-9 of 1200 IU/ml, 866 IU/ml, 665 IU/ml and 458 IU/ml, respectivelyBack to article page