Angioleiomyoma of the Plantar Foot

2018 ◽  
Vol 108 (3) ◽  
pp. 262-266 ◽  
Author(s):  
Ariel Lepoff ◽  
Vyacheslav Makarov ◽  
Marie Williams
Keyword(s):  
Differential Diagnosis ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Plantar Fascia ◽  
Magnetic Resonance Images ◽  
Soft Tissue Masses ◽  
Immunochemical Staining ◽  
Slow Growing

A 68-year-old man with a slow-growing lesion in the distal medial band of the plantar fascia of the left foot is presented. Clinical photographs, ultrasound and magnetic resonance images, histologic results, and immunochemical staining are disclosed. This case study presentation aims to highlight the importance of including angioleiomyoma in the differential diagnosis of plantar foot soft-tissue masses.

scholarly journals Giant Pilomatrixoma Presenting in the Posterior Thorax, a Rare Location and the Largest Described

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
P. Gongidi ◽  
J. Meshekow ◽  
T. Holdbrook ◽  
P. Germaine
Keyword(s):  
Differential Diagnosis ◽  
Soft Tissue ◽  
Head And Neck ◽  
Follicle Cells ◽  
Soft Tissue Neoplasm ◽  
Radiographic Features ◽  
Rare Location ◽  
Soft Tissue Masses ◽  
Slow Growing ◽  
Giant Pilomatrixoma

Pilomatrixoma is a common benign soft tissue neoplasm arising from hair follicle cells, typically not exceeding 3 cm and located mainly within the head and neck regions. Lesions greater than 3 cm or those located elsewhere are rare and are often not thought of or high on a differential diagnosis. Moreover, the radiographic features of pilomatrixoma are very nonspecific making the diagnosis even more difficult and rarely described in the radiology literature. We present the largest reported case of pilomatrixoma measuring 24 cm arising from the posterior thorax. Our hope is to increase awareness of this diagnosis for slow-growing soft tissue masses not located in the classically described locations of head and neck, explore the radiographic features on various imaging modalities, and review the current radiology literature.

Pigmented Villonodular Synovitis of the Ankle

2011 ◽  
Vol 101 (3) ◽  
pp. 252-258 ◽  
Author(s):  
Da-Peng Hao ◽  
Jian-Zhong Zhang ◽  
Wen-Jian Xu ◽  
Zhen-Chang Wang ◽  
Xue-Na Wang
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Bone Erosion ◽  
Pigmented Villonodular Synovitis ◽  
Magnetic Resonance Images ◽  
Villonodular Synovitis ◽  
Resonance Imaging ◽  
Soft Tissue Masses ◽  
Pigmented Villonodular

Background: Pigmented villonodular synovitis (PVNS) of the ankle is a rare benign proliferative growth of the synovium. Studies of the radiologic characteristics of ankle PVNS are sparse. Methods: To characterize the radiologic features of ankle PVNS, five patients with histologically proven ankle PVNS were retrospectively studied. The features of their radiographs, computed tomographic scans, and magnetic resonance images were reviewed, with emphasis on the morphological features, extension, margin, bone involvement, signal intensity, and degree of magnetic resonance enhancement. Results: All five lesions were diffuse, affecting the ankle and distal tibiofibular joint; three lesions also involved the subtalar joint. Radiography demonstrated extrinsic bone erosions with marginal sclerosis of the involved joints in all of the patients, but computed tomography identified this much better than did radiography. Magnetic resonance imaging revealed multiple lobulated soft-tissue masses in all of the cases. These soft-tissue masses surrounded the flexor hallux longus tendon and were hypointense on T1-weighted images, with a heterogeneous signal in two cases and homogenous hypointensity in three cases on fat-suppressed T2-weighted images. In one patient who underwent gadolinium-enhanced imaging, the masses showed intense enhancement. Conclusions: Magnetic resonance imaging is the best way to reveal ankle PVNS. Magnetic resonance imaging findings of predominant hypointensity on all pulse sequences and standard radiography findings of bone erosion with marginal sclerosis are characteristic. (J Am Podiatr Med Assoc 101(3): 252–258, 2011)

An unusual case: Ruptured and infected primary muscle cystic echinococcosis

2007 ◽  
Vol 52 (2) ◽  
Author(s):  
Davut Keskin
Keyword(s):  
Magnetic Resonance ◽  
Soft Tissue ◽  
Cystic Echinococcosis ◽  
Unusual Case ◽  
Case Reports ◽  
Quadriceps Muscle ◽  
Magnetic Resonance Images ◽  
Membranous Structure ◽  
Medical Treatments ◽  
Soft Tissue Masses

AbstractThere are few case reports of primary muscle cystic echinococcosis in which a hot abscess developed at the site of the cyst following its perforation. Here, the author presents a 23-year-old female with a hydatid cyst of more than 15 years’ duration in her right quadriceps muscle. The cyst did not cause any complaints for years and grew very slowly, but eventually became infected and perforated. A large hot abscess was formed at its site. The patient was managed successfully by surgical and medical treatments. She was assessed carefully for clinical, radiological, surgical and histopathological findings. Investigations were made to differentiate the condition from classical hot abscesses and other soft tissue masses. In T1-and T2-weighted magnetic resonance images, a hypointense membranous structure (the perforated rim) within the mass of the lesion was significant for its differential diagnosis. In conclusion, especially in endemic regions, magnetic resonance imaging is a valuable tool in differentiating soft tissue cystic echinococcosis in the presence of infected and rapidly enlarging masses after long periods of dormancy.

scholarly journals Solitary massive lipoma in the planter aspect of great toe presenting as two masses

2017 ◽  
Vol 5 ◽  
pp. 2050313X1773026
Author(s):  
Iyiade Olatunde Olaoye ◽  
Micheal Dapo Adesina
Keyword(s):  
Magnetic Resonance Imaging ◽  
Differential Diagnosis ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Clinical Signs ◽  
Great Toe ◽  
Resonance Imaging ◽  
Diagnostic Investigation ◽  
Soft Tissue Masses ◽  
The Right

Lipoma is rare in the planter aspect of the toes, and only few cases of massive lipoma have been reported in this site. The differential diagnosis of masses in the foot and toes is wide, and clinical diagnosis may be challenging. Access to magnetic resonance imaging, a standard diagnostic investigation for such soft tissue masses of the foot and toes, may be limited in some practice, requiring a reliance on clinical signs. We report a solitary massive lipoma in the planter aspect of the right great toe that appeared as two masses and with modification of typical clinical signs of lipoma.

scholarly journals Sensitivity analysis for interpretation of machine learning based segmentation models in cardiac MRI

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Markus J. Ankenbrand ◽  
Liliia Shainberg ◽  
Michael Hock ◽  
David Lohr ◽  
Laura M. Schreiber
Keyword(s):  
Neural Networks ◽  
Sensitivity Analysis ◽  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Cardiac Mri ◽  
Magnetic Resonance Images ◽  
Model Interpretation ◽  
First Case ◽  
Segmentation Models

Abstract Background Image segmentation is a common task in medical imaging e.g., for volumetry analysis in cardiac MRI. Artificial neural networks are used to automate this task with performance similar to manual operators. However, this performance is only achieved in the narrow tasks networks are trained on. Performance drops dramatically when data characteristics differ from the training set properties. Moreover, neural networks are commonly considered black boxes, because it is hard to understand how they make decisions and why they fail. Therefore, it is also hard to predict whether they will generalize and work well with new data. Here we present a generic method for segmentation model interpretation. Sensitivity analysis is an approach where model input is modified in a controlled manner and the effect of these modifications on the model output is evaluated. This method yields insights into the sensitivity of the model to these alterations and therefore to the importance of certain features on segmentation performance. Results We present an open-source Python library (misas), that facilitates the use of sensitivity analysis with arbitrary data and models. We show that this method is a suitable approach to answer practical questions regarding use and functionality of segmentation models. We demonstrate this in two case studies on cardiac magnetic resonance imaging. The first case study explores the suitability of a published network for use on a public dataset the network has not been trained on. The second case study demonstrates how sensitivity analysis can be used to evaluate the robustness of a newly trained model. Conclusions Sensitivity analysis is a useful tool for deep learning developers as well as users such as clinicians. It extends their toolbox, enabling and improving interpretability of segmentation models. Enhancing our understanding of neural networks through sensitivity analysis also assists in decision making. Although demonstrated only on cardiac magnetic resonance images this approach and software are much more broadly applicable.

Inflammatory Pseudotumours in the Abdomen and Pelvis: A Pictorial Essay

2014 ◽  
Vol 65 (1) ◽  
pp. 52-59 ◽  
Author(s):  
Tony Sedlic ◽  
Elena P. Scali ◽  
Wai-Kit Lee ◽  
Sadhna Verma ◽  
Silvia D. Chang
Keyword(s):  
Differential Diagnosis ◽  
Soft Tissue ◽  
Preoperative Diagnosis ◽  
Imaging Features ◽  
Clinical Context ◽  
Inflammatory Pseudotumour ◽  
Pictorial Essay ◽  
Soft Tissue Masses

Inflammatory pseudotumours are uncommonly encountered lesions in the abdomen and pelvis that often present with variable and nonspecific imaging features. They may mimic other more common lesions, including malignancy. Within the appropriate clinical context, inflammatory pseudotumours merit consideration in the differential diagnosis of soft-tissue masses within the abdomen and pelvis. A preoperative diagnosis of inflammatory pseudotumour, established through biopsy, may help to differentiate this benign entity from malignancy. In this article, we reviewed the imaging features of inflammatory pseudotumours of the abdomen and pelvis, including liver, spleen, bowel, retroperitoneum, kidney, bladder, uterus, and adnexa.

scholarly journals A Solitary Ventral Scapular Osteochondroma causing Pseudo-winging of Scapula: A Case Report

2021 ◽  
Vol 11 (7) ◽  
Author(s):  
Eknath Pawar ◽  
Nihar Modi ◽  
Amit Kumar Yadav ◽  
Jayesh Mhatre ◽  
Sachin Khemkar ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Case Report ◽  
Soft Tissue ◽  
Young Child ◽  
Chest Wall ◽  
Rare Case ◽  
Rare Presentation ◽  
Medial Border ◽  
Soft Tissue Masses ◽  
Scapular Region

Introduction: Winging of scapula is defined as a failure of dynamic stabilizing structures that anchor the scapula to the chest wall, leading to prominence of the medial border of scapula. It could be primary, secondary, or voluntary. Primary winging could be true winging due to neuromuscular causes or pseudo-winging due to osseous or soft-tissue masses. A scapular osteochondroma is a very rare presentation site and causes pseudo-winging leading to pushing away of the scapula away from the chest wall presenting as medial border prominence. Here, we are reporting a rare case of a scapular osteochondroma causing a pseudo-winging of the scapula. Case Report: A 2-year-old male child presented with painless, immobile, and non-fluctuant swelling over the left scapular region, insidious in onset and progressive in nature. On examination, a non-tender, immobile swelling was palpable with a painless and unrestricted range of motion at the shoulder joint. After evaluating radiographs and CT scan, the patient was diagnosed to have a ventral scapular osteochondroma leading to pseudo-winging of the scapula. Conclusion: Despite the rarity, a differential diagnosis of a scapular osteochondroma should be kept in mind while examining a young child presenting with a winged scapula. Keywords: Scapula, osteochondroma, pseudo-winging.

FDG-PET for preoperative differential diagnosis between benign and malignant soft tissue masses

2003 ◽  
Vol 32 (3) ◽  
pp. 133-138 ◽  
Author(s):  
J. Aoki ◽  
H. Watanabe ◽  
T. Shinozaki ◽  
K. Takagishi ◽  
M. Tokunaga ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Soft Tissue ◽  
Fdg Pet ◽  
Soft Tissue Masses ◽  
Malignant Soft Tissue

scholarly journals Development of an Evaluation System for Magnetic Resonance Imaging Based Three-Dimensional Modeling of a Transfemoral Prosthetic Socket Using Finite Elements

2019 ◽  
Vol 9 (18) ◽  
pp. 3662
Author(s):  
Mohd Syahmi Jamaludin ◽  
Akihiko Hanafusa ◽  
Yamamoto Shinichirou ◽  
Yukio Agarie ◽  
Hiroshi Otsuka ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Soft Tissue ◽  
Computer Aided Design ◽  
Evaluation System ◽  
Three Dimensional ◽  
Magnetic Resonance Images ◽  
Future Research ◽  
Tissue Deformation ◽  
Soft Tissue Deformation ◽  
Prosthetic Socket

Recent technologies have suggested the utilization of three-dimensional (3D) printing technology to enhance the fabrication accuracy of prosthetics. Accordingly, simulations are used to obtain precise parameters for subject-specified prosthetic socket. This study proposes an evaluation system to measure the accuracy of a subject-specific 3D transfemoral residuum model during the interaction with the socket in conjunction with the application of finite element methods. The proposed system can be used in future validations of socket fabrication. The evaluation is based on the measurement of the residuum’s soft tissue deformation inside two types of prosthetic sockets. In comparison with other studies, the 3D models were constructed with magnetic resonance images (MRI) with the aid of computer-aided design (CAD) software. The measurement of soft tissue deformation was conducted based on the measurement of the volumetric value of fat, muscle and skin in the pre- and post-donning phases. The result yielded a promising correlation coefficient value between the simulation and the experiment in the soft tissue deformation evaluation. The relation of the muscle–fat ratio in the residuum is extremely important in the determination of the ability of the prosthetic to deform. The environment during the socket fitting session was similar to that defined by the set boundary conditions in simulations. In view of the promising results of this study, the evaluation system proposed herein is considered reliable and is envisaged to be used in future research.

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