Figure 1

Malignant mesothelioma. Absence of MUC4 expression by immunohistochemistry (× 200). Inset: Normal MUC4 positive bronchiolar epithelium (× 200).

Malignant mesothelioma. Absence of MUC4 expression by immunohistochemistry (× 200). Inset: Normal MUC4 positive bronchiolar epithelium (× 200).