HRCT features of surgically resected invasive mucinous adenocarcinoma associated with interstitial pneumonia. Issue 4 (18th November 2016)

• Record Type: Journal Article
• Authors: Miyamoto, Atsushi; Kurosaki, Atsuko; Fujii, Takeshi; Kishi, Kazuma; Homma, Sakae
• Is Part Of: Respirology. Volume 22:Issue 4(2017)
• Page Start: 735
• Page End: 743
• Publication Date: 2016-11-18
• Subjects: high‐resolution computed tomography -- interstitial pneumonia -- invasive mucinous adenocarcinoma -- lung cancer -- thoracic surgery; Respiratory organs -- Diseases -- Periodicals; Respiratory organs -- Periodicals; 612.2
• DOI: 10.1111/resp.12947
• Languages: English
• ISSNs: 1323-7799

Abstract

Abstract: Background and objective: Lung cancer is prevalent among patients with interstitial pneumonia (IP). HRCT findings mucinous adenocarcinoma in patients with IP have not been described. Methods: In 112 consecutive patients with 120 surgically resected IP‐associated lung cancers, 42 patients had pathologically proven invasive adenocarcinoma (IA). A total of 14 out of 42 patients (10 men, 4 women, mean age, 68.4 years) had invasive mucinous adenocarcinoma. We reviewed the patients' medical records and HRCT scans. Results: Invasive mucinous adenocarcinoma were most commonly associated with idiopathic IP ( n = 13) affecting the lower lobe adjacent to a fibrocystic changes. In 11 patients with invasive mucinous adenocarcinoma or other types of IA, the tumour was adjacent to a fibrocystic lesion. In invasive mucinous adenocarcinoma, malignant signs included lobulation ( n = 11), spiculation ( n = 9), vascular convergence ( n = 10) and pleural indentation ( n = 2). Characteristic findings of mucinous adenocarcinoma (i.e. vague margins ( n = 10), lobular‐bounded margins ( n = 11), air bronchogram ( n = 11) and bubble‐like low attenuation ( n = 8)) were more common in invasive mucinous adenocarcinoma than in other IA types. All invasive mucinous adenocarcinoma tumours ( n = 11) were closely associated with fibrosis. Conclusion: Mixed ground‐glass opacity and consolidation adjacent to a fibrocystic lesion with malignant signs and characteristic features of mucinous adenocarcinoma indicate malignancy. Abstract : This study describes the unique HRCT features of invasive mucinous adenocarcinoma in patients with interstitial pneumonia. Signs of malignancy like lobulation, spiculation, vascular convergence and pleural indentation are together with vague margins, lobular‐bounded margins, air bronchogram and bubble‐like low attenuation indicative for an invasive mucinous adenocarcinoma.