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Palpation device for the identification of kidney and bladder cancer: a pilot study

 Jae Won Lee  ;  Enrique Ian S. Lorenzo  ;  Bummo Ahn  ;  Cheol Kyu Oh  ;  Hyung-Joo Kim  ;  Woong Kyu Han  ;  Jung Kim  ;  Koon Ho Rha 
 YONSEI MEDICAL JOURNAL, Vol.52(5) : 768-772, 2011 
Journal Title
Issue Date
Adult ; Aged ; Elastic Modulus ; Elasticity Imaging Techniques/instrumentation* ; Equipment Design ; Female ; Humans ; In Vitro Techniques ; Kidney/physiology ; Kidney Neoplasms/diagnosis* ; Kidney Neoplasms/physiopathology ; Male ; Middle Aged ; Palpation/instrumentation* ; Phantoms, Imaging ; Pilot Projects ; Urinary Bladder/physiology ; Urinary Bladder Neoplasms/diagnosis* ; Urinary Bladder Neoplasms/physiopathology
Elastic modulus ; palpation device ; renal cell carcinoma ; urothelial ; carcinoma
PURPOSE: To determine the ability of a novel palpation device to differentiate between benign and malignant tissues of the kidney and bladder by measuring tissue elasticity. MATERIALS AND METHODS: A novel palpation device was developed, mainly composed of a micromotor, a linear position sensor, a force transducer, and a hemisphere tip and cylindrical body probe. Motion calibration as well as performance validation was done. The tissue elasticity of both benign and malignant tissues of the kidney and bladder was measured using this device. A single investigator performed the ex-vivo palpation experiment in twelve kidneys and four bladder specimens. Malignant tissues were made available from partial nephrectomy specimens and radical cystectomy specimens. Palpations for benign renal parenchyma tissue were carried out on nephroureterectomy specimens while non-involved areas in the radical cystectomy specimens were used for benign bladder samples. Elastic modulus (Young's modulus) of tissues was estimated using the Hertz-Sneddon equation from the experimental results. These were then compared using a t-test for independent samples. RESULTS: Renal cell carcinoma tissues appear to be softer than normal kidney tissues, whereas tissues from urothelial carcinoma of the bladder appear to be harder than normal bladder tissues. The results from renal cell carcinoma differed significantly from those of normal kidney tissues (p=0.002), as did urothelial carcinoma of the bladder from normal bladder tissues (p=0.003). CONCLUSION: Our novel palpation device can potentially differentiate between malignant and benign kidney and bladder tissues. Further studies are necessary to verify our results and define its true clinical utility.
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1. College of Medicine (의과대학) > Dept. of Urology (비뇨의학교실) > 1. Journal Papers
Yonsei Authors
Rha, Koon Ho(나군호) ORCID logo https://orcid.org/0000-0001-8588-7584
Lorenzo, Enrique Ian(이안로렌조)
Han, Woong Kyu(한웅규) ORCID logo https://orcid.org/0000-0002-2527-4046
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