Soft tissue abnormalities in Wassel Type VI radial polydactyly: a detailed anatomical study

2021 ◽  
Vol 46 (4) ◽  
pp. 352-359
Author(s):  
Susumu Saito ◽  
Itaru Tsuge ◽  
Hiroki Yamanaka ◽  
Naoki Morimoto
Keyword(s):  
Soft Tissue ◽  
Three Dimensional ◽  
Anatomical Study ◽  
Metacarpophalangeal Joint ◽  
Abductor Pollicis Brevis ◽  
Level Of Evidence ◽  
Thenar Muscle ◽  
Pulley System ◽  
Radial Deviation ◽  
Tissue Abnormalities

Wassel VI radial polydactyly is associated with metacarpal adduction and radial deviation of the metacarpophalangeal joint of the ulnar duplicate. The soft tissue abnormalities responsible for these deformities were characterized using preoperative multi-planar three-dimensional ultrasound and intraoperative observation in four patients. In all patients, the abductor pollicis brevis and superficial head of the flexor pollicis brevis inserted into the radial first metacarpal, whereas the adductor pollicis and deep head of the flexor pollicis brevis inserted into the ulnar thumb. Aberrant location of the flexor pollicis longus and absence of the A1 pulley system was associated with severe radial deviation. An additional superficial thenar muscle along the ulnar metacarpal was associated with minimal metacarpal adduction. Uneven forces on the ulnar duplicate could be associated with these characteristic deformities and joint instability. Knowledge of these abnormalities allows better planning of surgery and further insight into this rare radial polydactyly configuration. Level of evidence: II

scholarly journals Reproducibility of Novel Soft-Tissue Landmarks on Three-Dimensional Human Facial Scan Images in Caucasian and Asian

2021 ◽  
Author(s):  
Zhouxiao Li ◽  
Riccardo Enzo Giunta ◽  
Konstantin Frank ◽  
Thilo Ludwig Schenck ◽  
Konstantin Christoph Koban
Keyword(s):  
Soft Tissue ◽  
Three Dimensional ◽  
Reference Points ◽  
Full Description ◽  
Surface Imaging ◽  
Facial Soft Tissue ◽  
Level Of Evidence ◽  
Race And Gender ◽  
Facial Region ◽  
And Gender

Abstract Background Three-dimensional surface imaging is established in many disciplines for objective facial acquisition regarding anthropometry. Former studies addressed the validation of landmark-based measurements for single race. In order to distinguish racial difference, the reproducibility of the landmark measurements must first be validated. Objectives Our purpose is to validate the reproducibility of 46 facial soft-tissue landmarks on x, y, z axes to prove their reliability as 3D reference points. Methods The study included 80 European Caucasian and 80 Chinese volunteers. Standardized 3D surface imaging was performed using Vectra 3D system. Two raters identified and defined 46 landmarks (138 coordinates), then repeatedly 3D-imaged volunteers' facial region in separate sessions. Coordinates' reproducibility of landmarks is divided into three categories (< 0.5 mm, < 1 mm, and >1 mm) for intra- and inter-rater reproducibility assessments. Results Coordinates' reproducibility of 160 samples was distributed as follows: Intra-rater: < 0.5 mm (45%), < 1 mm (42%), >1 mm (13%); inter-rater: < 0.5 mm (31.2%), < 1 mm (42%), > 1 mm (26.8%). The reproducibility of landmarks in nasal tip region differs slightly between Caucasians and Asians. Compared to females, males typically have higher landmark reproducibility in lip and chin region. However, there were no differences in the reproducibility ranking of landmarks by gender. Conclusion The majority of the 46 landmarks in the 3D plane are reproducible to 1 mm, which is clinically acceptable. All selected landmarks showed strong consistency across race and gender, suggesting their potential use as reference points in prospective clinical practice. Level of Evidence IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

An anatomical study on the Stener-type lesion of the radial collateral ligament of the metacarpophalangeal joint of the thumb

2019 ◽  
Vol 45 (2) ◽  
pp. 131-135 ◽  
Author(s):  
Rafael G Jakubietz ◽  
Sueleyman Erguen ◽  
Silvia Bernuth ◽  
Rainer H Meffert ◽  
Fabian Gilbert ◽  
...  
Keyword(s):  
Anatomical Study ◽  
Metacarpophalangeal Joint ◽  
High Index ◽  
Neutral Position ◽  
Collateral Ligament ◽  
Abductor Pollicis Brevis ◽  
Radial Collateral Ligament ◽  
High Index Of Suspicion

The Stener-type lesion of the radial collateral ligament is rare. The insertion of the abductor pollicis brevis is believed to preclude its occurrence. The aim of this study was to determine whether this lesion can be induced mechanically. Four specimens were tested in neutral rotation and 20° of supination, in 45° and 30° of flexion, and in the neutral position. The angle of ulnar adduction to form a Stener-type lesion was measured. The lesion occurred only in 45° flexion in all specimens. A lesser angle of flexion decreased the rate of ligament displacement. In the neutral position no ligament displacement was found. A Stener-type lesion of the radial collateral ligament can occur in ulnar adduction and flexion of the metacarpophalangeal joint. Supination of the joint increases the likelihood of ligament displacement. As distal ruptures of the radial collateral ligament are uncommon, a high index of suspicion is required for diagnosis.

scholarly journals DynaCT angiography for the diagnosis of bilateral bow hunter’s syndrome

2016 ◽  
Vol 23 (1) ◽  
pp. 73-78 ◽  
Author(s):  
Tony Lu ◽  
Ponraj Chinnadurai ◽  
Javier E Anaya-Ayala ◽  
Orlando M Diaz
Keyword(s):  
Soft Tissue ◽  
Cone Beam Ct ◽  
Three Dimensional ◽  
Cone Beam ◽  
Vertebrobasilar Insufficiency ◽  
Digital Subtraction ◽  
Tissue Abnormalities ◽  
Additional Value ◽  
Hunter's Syndrome

We herein present a rare case of bilateral positional vertebrobasilar insufficiency secondary to mechanical obstruction of the V2 segment of the vertebral artery in a 71-year-old patient presenting with vertigo, occipital headache, tremors and respiratory irregularities. Two-dimensional digital subtraction angiography is the traditional diagnostic imaging standard but does not capture any peri-vascular bony or soft tissue abnormalities that are important to understand the three-dimensional pathophysiology. Intra-procedural cone-beam computed tomography (CT) is an increasingly used diagnostic adjunct, available in most modern angiographic suites that allows for the three-dimensional visualization of the vasculature as well as CT-like soft tissue visualization of its surrounding anatomy. In this case, we report the additional value of three-dimensional reconstructed cone-beam CT angiographic imaging that led to the successful diagnosis of bilateral positional vertebrobasilar disease. The patient subsequently received C4–C6 cervical decompression and fusion and remains symptom free at 1 year follow-up.

Three-Dimensional Computer-Assisted Single-Splint 2-Jaw Cleft Orthognathic Surgery: Toward Patient-Centered Surgical Rationale

2020 ◽  
Vol 57 (12) ◽  
pp. 1428-1433
Author(s):  
Rafael Denadai ◽  
Yu-Ray Chen ◽  
Lun-Jou Lo
Keyword(s):  
Soft Tissue ◽  
Orthognathic Surgery ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Three Dimensional ◽  
Computer Assisted ◽  
Patient Centered ◽  
3 Dimensional ◽  
Facial Contour ◽  
Tissue Abnormalities

Skeletally mature patients with cleft lip and palate commonly present with skeletofacial deformities characterized by varying degrees of intrinsic and acquired dentoskeletal and soft tissue abnormalities. These abnormalities are associated with scarring from previous surgeries and the asymmetric midline and facial contour that impose challenges for adequate reconstruction. These patients frequently require 2-jaw orthognathic surgery to improve occlusal function and for correction of facial deformities. In this article, we have detailed a 3-dimensional computer-assisted single-splint 2-jaw orthognathic surgery technique as a surgical approach for cleft skeletofacial reconstruction, allowing for the surgery to be tailored according to the specific needs and requests of the patients. Further, we have addressed the multidimensionality and specificities of cleft treatment, the wide versatility, adaptability, and applicability of this technique, and the patient-centered rationale for the adoption of this method.

scholarly journals Microwave tomography: review of the progress towards clinical applications

2009 ◽  
Vol 367 (1900) ◽  
pp. 3021-3042 ◽  
Author(s):  
Serguei Semenov
Keyword(s):  
Soft Tissue ◽  
Soft Tissues ◽  
Imaging Modality ◽  
Three Dimensional ◽  
Clinical Applications ◽  
Microwave Tomography ◽  
Non Invasive ◽  
Dielectric Contrast ◽  
High Dielectric ◽  
Tissue Abnormalities

Microwave tomography (MWT) is an emerging biomedical imaging modality with great potential for non-invasive assessment of functional and pathological conditions of soft tissues. This paper presents a review of research results obtained by the author and his colleagues and focuses on various potential clinical applications of MWT. Most clinical applications of MWT imaging have complicated, nonlinear, high dielectric contrast inverse problems of three-dimensional diffraction tomography. There is a very high dielectric contrast between bones and fatty areas compared with soft tissues. In most cases, the contrast between soft-tissue abnormalities (the target imaging areas) is less pronounced than between bone (fat) and soft tissue. This additionally complicates the imaging problem. In spite of the difficulties mentioned, it has been demonstrated that MWT is applicable for extremities imaging, breast cancer detection, diagnostics of lung cancer, brain imaging and cardiac imaging.

Anatomical Study of the Quadrigeminal Cistern in Patients with Three-Dimensional MR Cisternography

Skull Base ◽  
2009 ◽  
Vol 19 (01) ◽  
Author(s):  
Laura Columbano ◽  
Wolf Lüdemann ◽  
Lennart Stieglitz ◽  
Mario Giordano ◽  
Amir Samii ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Anatomical Study ◽  
Mr Cisternography ◽  
Quadrigeminal Cistern

scholarly journals Accuracy and Reproducibility of Facial Measurements of Digital Photographs and Wrapped Cone Beam Computed Tomography (CBCT) Photographs

Diagnostics ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 757
Author(s):  
Maged Sultan Alhammadi ◽  
Abeer Abdulkareem Al-mashraqi ◽  
Rayid Hussain Alnami ◽  
Nawaf Mohammad Ashqar ◽  
Omar Hassan Alamir ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Soft Tissue ◽  
Cone Beam Computed Tomography ◽  
High Reliability ◽  
Three Dimensional ◽  
Cone Beam ◽  
Cross Sectional ◽  
Facial Profile ◽  
Digital Photographs ◽  
Gonial Angle

The study sought to assess whether the soft tissue facial profile measurements of direct Cone Beam Computed Tomography (CBCT) and wrapped CBCT images of non-standardized facial photographs are accurate compared to the standardized digital photographs. In this cross-sectional study, 60 patients with an age range of 18–30 years, who were indicated for CBCT, were enrolled. Two facial photographs were taken per patient: standardized and random (non-standardized). The non-standardized ones were wrapped with the CBCT images. The most used soft tissue facial profile landmarks/parameters (linear and angular) were measured on direct soft tissue three-dimensional (3D) images and on the photographs wrapped over the 3D-CBCT images, and then compared to the standardized photographs. The reliability analysis was performed using concordance correlation coefficients (CCC) and depicted graphically using Bland–Altman plots. Most of the linear and angular measurements showed high reliability (0.91 to 0.998). Nevertheless, four soft tissue measurements were unreliable; namely, posterior gonial angle (0.085 and 0.11 for wrapped and direct CBCT soft tissue, respectively), mandibular plane angle (0.006 and 0.0016 for wrapped and direct CBCT soft tissue, respectively), posterior facial height (0.63 and 0.62 for wrapped and direct CBCT soft tissue, respectively) and total soft tissue facial convexity (0.52 for both wrapped and direct CBCT soft tissue, respectively). The soft tissue facial profile measurements from either the direct 3D-CBCT images or the wrapped CBCT images of non-standardized frontal photographs were accurate, and can be used to analyze most of the soft tissue facial profile measurements.

scholarly journals Coronal STIR sequence, a simple adjustment to routine MRI protocol for extra-spinal sciatica and sciatica-like symptoms

2019 ◽  
Vol 50 (1) ◽  
Author(s):  
Rania Zeitoun ◽  
Mohammed Saleh Ali Mohieddin
Keyword(s):  
Young Adults ◽  
Soft Tissue ◽  
Mr Imaging ◽  
Age Groups ◽  
Field Of View ◽  
Mri Protocol ◽  
Stir Sequence ◽  
Tissue Abnormalities ◽  
Additional Value ◽  
Bone Abnormalities

Abstract Background The value of adding coronal STIR images to MR imaging of sciatica aiming to detect extra-spinal abnormalities. Results Additional coronal STIR images detected extra-spinal abnormalities in 20% of the patients, thereby downgraded the normal studies from 21 to 13%. The extra-spinal abnormalities included bone abnormalities (36.4%), soft tissue abnormalities (4.5%), neurological abnormalities (2.3%), gynecological abnormalities (50%), and miscellaneous (6.8%). In 6.9% of patients, the extra-spinal abnormalities explained the patients’ pain and influenced their management. Extra-spinal causes of pain significantly correlated to positive trauma and neoplasm history, normal routine protocol images, and absent nerve root impingement. Extra-spinal abnormalities were more prevalent in age groups (20–39 years). Conclusion Coronal STIR images (field of view: mid abdomen to the lesser trochanters) identify extra-spinal abnormalities that maybe overlooked on routine MRI protocol. It is of additional value in young adults, trauma, neoplasm, and negative routine images.

Sign in / Sign up

Export Citation Format

Share Document