Arteriovenous malformations (AVMs) of the pelvis are relatively rare and difficult to treat because of multiple and extensive feeding vessels. We report the case of a 69-year-old male with pelvic congenital AVM that was detected during tests for dysuria. He visited our hospital complaining of voiding difficulty. Digital rectal examination revealed a pulsating mass that was palpable on the right side of the prostate. Transrectal ultrasonography showed multiple hypoechoic lesions adjacent to the prostate and colour Doppler ultrasonography revealed the flow regions corresponded to the hypoechoic lesions. Computed tomography demonstrated large-to-small tubular vessels adjacent to the prostate, while pelvic angiography showed many small feeder arteries extending mainly from the right internal iliac artery. He was diagnosed as having pelvic congenital AVM. Uroflowmetry revealed slight voiding difficulty without residual urine. The patient decided against treatment and requested we monitor his clinical course.
A 31-year-old-female presented with a left renal mass detected incidentally during an abdominal ultrasound examination. Computed tomography and angiography revealed a hypovascular solid tumor 4.5 cm in diameter at the middle portion of the left kidney. Laparoscopic left nephrectomy was performed and macroscopic examination of the specimen revealed encapsulated tumor with grayish yellow cut surface. Histological examination demonstrated that the tumor cells were small scant cytoplasms, containing round and regular nuclei, forming a glomerular-like structure. There was no mitosis nor cellular atypia indicating a malignant structure. The histological diagnosis was metanephric adenoma.
We can automate inspection work of infrastructure facilities by analyzing the characteristics of 3D structure information obtained through 3D structure visualization using a point cloud. The safety level of equipment can then be diagnosed quantitatively. In this paper, we investigate the modeling of wire structures such as overhead communication cables between utility poles, which are close to the ground, have many obstructions, and have a complex structure. We evaluate the accuracy of cable models and compare them to the correct model. We use three modeling methods: a machine-learning method based on the extruded surface of a point cloud as a feature, a rule-based method involving principal component analysis, and models generated from a combination of these models. In addition, we focus on modeling overhead cables from field data (urban and suburban). Results show the practicability of modeling overhead cables with a cable length of 10–70 m regardless of the area type. We find that the best cable modeling rate with the precision and recall of 80.76% and 83.84%, respectively, can be obtained using the machine-learning method and by specifying the cable reproduction rate to be 2 m. Article highlights This study is useful in determining the practicality of 3D visualization of communication cables based on a 3D point cloud. Precision and recall are presented as indices to determine the practicality of 3D cable modeling. This study provides 3D cable modeling for actual field data (in suburban, bridges, and urban areas).
Arteriovenous malformations (AVMs) of the pelvis are relatively rare and difficult to treat because of multiple and extensive feeding vessels. We report the case of a 69-year-old male with pelvic congenital AVM that was detected during tests for dysuria. He visited our hospital complaining of voiding difficulty. Digital rectal examination revealed a pulsating mass that was palpable on the right side of the prostate. Transrectal ultrasonography showed multiple hypoechoic lesions adjacent to the prostate and colour Doppler ultrasonography revealed the flow regions corresponded to the hypoechoic lesions. Computed tomography demonstrated large-to-small tubular vessels adjacent to the prostate, while pelvic angiography showed many small feeder arteries extending mainly from the right internal iliac artery. He was diagnosed as having pelvic congenital AVM. Uroflowmetry revealed slight voiding difficulty without residual urine. The patient decided against treatment and requested we monitor his clinical course. IntroductionArteriovenous malformations (AVMs) of the pelvis are relatively rare, usually congenital lesions, and are difficult to treat because of multiple and extensive feeding vessels.1 Selective angiography of the iliac arteries is still the best method for diagnosing pelvic AVM, although the usefulness of computed tomography (CT) has also been recognized.Transrectal ultrasonography (US) is one test used in the routine evaluation of dysuria in male patients, and can assist with ruling out diseases, such as prostate cancer and benign hyperplasia. We describe a patient with congenital pelvic AVM who complained of voiding difficulty, and we also discuss the use of transrectal US to diagnose pelvic AVM. Case reportA 69-year-old male visited our hospital with the chief complaint of voiding difficulty, which has persisted for more than 12 months. He was taking medications for dysuria, including an alpha-1 blocker, which had been prescribed by another doctor. There was no history of abdominal or pelvic trauma or surgery.Rectal examination revealed a normal-sized prostate; however, a pulsating mass was palpable on the right side. Transrectal US showed a normal image and normal prostate size (prostate volume was 16.8 cm 3 ); however, multiple hypoechoic lesions with a heterogenous sonographic pattern were located adjacent to the prostate. Colour Doppler US demonstrated flow regions, with a light colour in the same lesions ( Fig. 1). Routine laboratory values and urine analysis were normal. The serum prostate specific antigen (PSA) level was normal (0.52 ng/mL). We suspected congenital pelvic AVM and performed a pelvic enhanced CT.Pelvic CT showed large to small tubular vessels adjacent to the prostate, and AVM and aneurysmal changes were observed mainly on the right side of the pelvis (Fig. 2, Fig. 3). Pelvic angiography revealed a large AVM being supplied mainly by the right internal iliac artery (Fig. 4). Many small feeder vessels, including from the left internal iliac artery, that drained directly into th...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.