A case of invasive intraductal papillary mucinous adenocarcinoma of the pancreas presenting with atypical CT findings for metastatic lung tumors

Abstract

This case concerns an 80-year-old female. During the postoperative course of invasive intraductal papillary mucinous adenocarcinoma, computed tomography scans revealed multiple granular and nodular shadows clustered around the bronchovascular bundle in both lungs, leading to the referral of this patient. A second transbronchial biopsy revealed an expanded mucous lake in the interstitium beneath the bronchial epithelium, with TTF-1-negative atypical cells with some internal lumen formation, and a diagnosis of intrapulmonary metastasis of invasive intraductal papillary mucinous adenocarcinoma was made. This was a valuable case that presented a unique pattern of metastasis, unlike the typical chest shadows of metastatic lung tumors, including pulmonary metastasis of pancreatic cancer.