Ultrasound of the Prostate and Testicles

Lavoipierre, Alain M.

doi:10.1007/s002689910033

Cited by 19 publications

(6 citation statements)

References 44 publications

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“…Estes achados corroboram aos trabalhos de Lavoipierre (2000), quando descreveram o padrão ultrassonográfico do testículo normal como homogêneo, onde ambos os antímeros devem apresentar mesma ecogenicidade, caso contrário, deve-se suspeitar de patologia. Teixeira et al (2011) avaliando ovinos das raças Dopper e Santa Inês utilizando a técnica do histograma demonstraram que não houve diferença estatística significativa entre a ecogenicidade do parênquima dos testículos direito e esquerdo entre as espécies.…”

Section: Discussionunclassified

Análise quantitativa da ecogenicidade testicular pela técnica do histograma de ovinos da baixada ocidental maranhense

et al. 2015

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RESUMO.-A ultrassonografia é um método de diagnóstico por imagem que permite a avaliação de diferentes órgãos e estruturas corpóreas de maneira não invasiva. No entanto, a avaliação subjetiva das imagens caracteriza um dos grandes entraves na utilização desta técnica de diagnósti-co, havendo necessidade de mecanismos que minimizem a subjetividade do exame e a divergência na interpretação dos achados ultrassonográficos. Desta forma este trabalho objetivou caracterizar a ecogenicidade do parênquima e mediastino testicular de ovinos utilizando a técnica do histograma escala-cinza. Foram utilizados 30 animais divididos em três grupos de acordo com a faixa etária (FE): de três a seis meses (FE1), sete a 12 meses (FE2), 13 a 18 meses (FE3) e realizadas varreduras testiculares nos planos frontal, sagital e transversal, elaborando ao final um histo- Ultrasound is a diagnostic imaging method that allows a no invasive evaluation of different organs and body structures. However, the personal evaluation of images is one of the major hampers in using this technique. In order to reduce this drawback, it is necessary to find out tools that can help diminish the divergence in the interpretation of sonographic findings. Therefore, this study aimed to identify features of the parenchyma's and mediastinum's testis of sheep echogenicity using the technique of gray scale histogram. 30 animals were divided into three groups according to age (FE): three to six months (FE1), seven to 12 months (FE2), 13 to 18 months (FE3). The testicular scans were performed in the frontal, sagital and transverse views, and the gray scale histograms were analyzed. It was observed that such parenchymal as the mediastinum testis echogenicity gradually increased with the aging of the animals, with mean and standard deviation of 95.00±19.05 and 94.35±18.82 for the echogenicity parenchyma of the right and left antimere, respectively, and 127.95±12.97 to 126.59±11.78, for the right and the left mediastinum. The technique of gray scale histogram was an efficient method for determination of testicular echogenicity, enabling the establishment of normal standards that may assist future research in monitoring testicular development as well as for detecting pathologies. For exclusive regimes of extensive farming, as the western lowland region of Maranhão, is a valuable tool for use in social projects of the State to attend the family farm.

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Section: Discussionunclassified

Análise quantitativa da ecogenicidade testicular pela técnica do histograma de ovinos da baixada ocidental maranhense

et al. 2015

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“…Clinical examination combined with high-resolution US can usually provide the reassurance needed [2]. However, a difficult problem arises when the clinical examination is normal but US detects an abnormality, particularly if that abnormality is a hypoechoic area, as the characteristic US appearance of a seminoma is a homogeneous hypoechoic area [3]. We report a series of cases of incidentally discovered impalpable lesions of the testis, all of which had a hypoechoic appearance on US.…”

Section: Introductionmentioning

confidence: 97%

Impalpable testis cancer

et al. 2003

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discomfort in two men, contralateral orchitis, and the follow-up of testicular microlithiasis. The lesions were 4-11 mm in size and one man had several. None of the lesions were palpable; the tumour markers were normal in all patients. RESULTSThree of the testes contained seminoma; in one there were two foci of seminoma and in all intratubular germ cell neoplasia was also identified. The remaining case was a Leydigcell tumour. All tumours were staged as pT1 after radical inguinal orchidectomy. CONCLUSIONImpalpable lesions of the testis are likely to be malignant if they are hypoechoic on US and should be considered as seminoma until proved otherwise. The management thereafter is not straightforward, but must ensure an adequate histological diagnosis if the US appearances do not resolve.

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“…The normal testicle is homogenous and of relatively low echogenity. The mediastinum testis appears as an echogenic band situated peripherally in the testicle parallel to the epididymis (Lavoipierre, 2000). After our initial successful puncture of human rete testis in preliminary clinical trials, we attempted to collect spermatozoa from the rete testis of OA and NOA men in the current study.…”

Section: Discussionmentioning

confidence: 99%

The role of ultrasonographically guided puncture of the human rete testis in the therapeutic management of nonobstructive azoospermia*

Kaponis¹,

Yiannakis²,

Tsoukanelis³

et al. 2003

Andrologia

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We attempted to characterize the cells collected from the rete testis via ultrasonographically guided puncture. Unilateral puncture of the rete testis was performed in nine men with obstructive azoospermia and 51 men with nonobstructive azoospermia. All the aspirated samples from the rete testis were observed via confocal scanning laser microscope and some of them after fluorescent in situ hybridization techniques. Then therapeutic testicular biopsy was performed in the punctured testis of each man. Spermatozoa were found in all rete testis samples and all biopsy samples from obstructed men. Twenty-two nonobstructed men demonstrated absence of spermatozoa in biopsy samples. Twenty-nine nonobstructed men showed spermatozoa in biopsy material and 24 of these men (82%) had demonstrated spermatozoa in rete testis samples. There were no significant differences in fertilization and cleavage rate between intracytoplasmic sperm injection trials using biopsy spermatozoa and rete testis spermatozoa both in obstructed and nonobstructed men. Considering that puncture of the rete testis does not reduce the volume of testicular parenchyma, is less invasive and apparently causes less detrimental effect on testicular vasculature than biopsy, puncture of rete testis is recommended as first line approach for the treatment of azoospermic men. If puncture is negative for spermatozoa in nonobstructed men, biopsy is indicated.

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Ultrasound of the Prostate and Testicles

Cited by 19 publications

References 44 publications

Análise quantitativa da ecogenicidade testicular pela técnica do histograma de ovinos da baixada ocidental maranhense

Análise quantitativa da ecogenicidade testicular pela técnica do histograma de ovinos da baixada ocidental maranhense

Impalpable testis cancer

The role of ultrasonographically guided puncture of the human rete testis in the therapeutic management of nonobstructive azoospermia*

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