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Vascularization of Primary, Peripheral Lung Carcinoma in CEUS - A Retrospective Study (n = 89 Patients)
Hajo Findeisen1, Corinna Trenker2, Jens Figiel3
1Interdisciplinary Centre for Ultrasound Diagnostics, Philipps-University of Marburg, Germany.
Purpose:
To describe the vascularization of peripheral lung carcinoma in CEUS and to compare with B-mode ultrasound (US) and clinical data.
Materials And Methods:
From April 2004 until September 2015, n = 89 patients with peripheral lung carcinoma were investigated by B-mode US and CEUS. The extent (EE: hypoechoic, hyperechoic), homogeneity (HE: homogeneous, inhomogeneous) and time of enhancement (TE) have been defined. Early pulmonary-arterial enhancement (PA) before contrast floating to the thoracic wall was differentiated from simultaneous or delayed bronchial-arterial enhancement (BA). CEUS parameters were compared by B-mode US and histology.
Results:
n = 25 patients had early PA enhancement (TE: 8 ± 3.7 s), and n = 64 (72 %) had simultaneous/delayed BA enhancement (TE: 17.6 ± 6.2 s) (p < 0.001). PA enhancement (EE/HE) was hyperechoic (n = 11/25), homogeneous (n = 11/25) and showed an air bronchogram more often (n = 11/17, p < 0.001). BA enhancement (EE/HE) was frequently hypoechoic (n = 34/64) and inhomogeneous (n = 54/64). BA enhancement was associated with necrosis (n = 36/42, p = 0.009). PA and BA enhancement distributed to different histologies: n = 42 adenocarcinomas (18 PA, 24 BA), n = 30 squamous cell carcinomas (4 PA, 26 BA), n = 13 other types of NSCLC (3 PA, 10 BA), and n = 4 SCLC (0 PA, 4 BA) (p = 0.016).
Conclusion:
The vascularization of peripheral lung carcinomas is heterogeneous and is influenced by histology. In this study, lung carcinomas are predominantly supplied by bronchial arteries, whereas a part of adenocarcinomas and non-adenocarcinomas show PA enhancement.
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