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- Title
Contrast-enhanced ultrasound using a time-intensity curve for the diagnosis of renal cell carcinoma.
- Authors
Aoki, Shigeyuki; Hattori, Ryohei; Yamamoto, Tokunori; Funahashi, Yasuhito; Matsukawa, Yoshihisa; Gotoh, Momokazu; Yamada, Yoshiaki; Honda, Nobuaki
- Abstract
OBJECTIVE • To evaluate the usefulness of contrastenhanced ultrasound (CEUS) for the diagnosis of renal cell carcinoma by employing a time-intensity curve (TIC). PATIENTS AND METHODS • From May 2008 to October 2009, CEUS was performed prior to surgery in 30 patients with renal masses. • In all, 10 of the 30 patients had cystic renal masses. The final diagnoses of all patients were pathologically confirmed. Contrast enhancement as a function of time was measured in two (tumour or solid component of cystic lesions and normal parenchyma) regions of interest (ROI) and TICs were obtained. • The time to the contrast enhancement peak (TTP), intensity change from the baseline to peak (ΔI) and ΔI/TTP of the tumour and the normal parenchyma were measured from the TIC. RESULTS • Pathological diagnoses were renal cell carcinoma in 30 patients. • The TTP of the cancer was shorter than that of the normal parenchyma in all cases (6.0 ± 2.0 vs 10.4 ±3.0 s; P < 0.0001). • The ΔI did not differ between the cancer and normal parenchyma [21.3 ±5.9 vs 20.9 ±7.0 decibels (db); P = 0.68]; the Δ I/TTP of the cancer was significantly higher than that of the normal parenchyma (3.9 ± 1.4 vs 2.2 ± 0.94 db/s; P < 0.0001). • TIC patterns of solid cancer and cystic cancer were very similar. CONCLUSIONS • An objective and quantitative diagnosis of renal cell carcinoma by CEUS using a second-generation ultrasound contrast agent can be made by employing a TIC. • The TIC patterns of solid and cystic cancers were very similar, despite their morphological and vascular differences. • CEUS using TIC is a promising tool in the diagnosis of cystic renal cancer.
- Subjects
CONTRAST-enhanced ultrasound; RENAL cell carcinoma; CYSTS (Pathology); TUMORS; DIAGNOSTIC ultrasonic imaging
- Publication
BJU International, 2011, Vol 108, Issue 3, p349
- ISSN
1464-4096
- Publication type
Article
- DOI
10.1111/j.1464-410X.2010.09799.x