Figure 1: (a) A mass was revealed by CT scan in the right posterior lung lobe in Patient 6, which was found to be a poorly differentiated adenocarcinoma by CT-guide needle aspiration biopsy. (b) MRI showed a mass in the posterior pituitary gland and thickening of the pituitary stalk when she first visited our hospital. (c) Repeated MRI after one month in the same patient revealed that the space-occupying lesion increased in size and grew upward to form a dumbbell-shaped sellar mass