Imaging of rare appendicular non-acral soft-tissue chondromas in adults with histopathologic correlation

2017 ◽  
Vol 59 (6) ◽  
pp. 700-708
Author(s):  
Mohamed Ragab Nouh ◽  
Hanan Abd El-Aziz Amr ◽  
Rola H Ali
Keyword(s):  
Soft Tissue ◽  
Signal Intensity ◽  
Tissue Reaction ◽  
High Signal ◽  
Diagnostic Challenge ◽  
Post Contrast ◽  
Intensity Matrix ◽  
Tissue Edema ◽  
Magnetic Resonance Imaging Mri

Background Soft-tissue chondroma (STC) is a rare benign soft tissue tumor that arises primarily in acral extra-skeletal locations. Occasionally, STCs may arise in more proximal non-acral locations, accompanied by non-classic features that label them as indeterminate lesions and pose diagnostic challenge for both radiologists and pathologists alike. Purpose To explicate the potential of diagnostic imaging in the identification and characterization of appendicular non-acral STCs with emphasis on their morphologic magnetic resonance imaging (MRI) enhancement. Material and Methods Our clinical database records were searched for patients with histologically proven primary soft-tissue chondroid lesions over a five-year period. Two musculoskeletal (MSK) trained radiologists evaluated the imaging studies and an MSK pathologist revised the pathological findings. Results The study included six cases of appendicular non-acral STCs (mean age = 40.5 years). The mean size of the tumors was 5.6 cm, with four localized to the knee region, one in the thigh, and one in the sternoclavicular region. All cases showed high signal intensity matrix with low-signal intensity septa on T2-weighted MRI and post-contrast marginal/septal enhancement. The lesions were lobulated and lacked host tissue reaction except for one showing subjacent mild soft-tissue edema. Histologically, the cases lacked overt features of malignancy although one was originally misdiagnosed as chondrosarcoma. Conclusion Non-acral STCs are benign cartilaginous tumors that may pose a diagnostic challenge, both radiologically and pathologically. Collaborative imaging and pathologic workup is needed for better characterization of non-aggression of these lesions, and to avoid diagnostic pitfalls and unnecessary radical resections.

scholarly journals Pitfalls of diffusion-weighted imaging of the female pelvis

2018 ◽  
Vol 51 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Ana Luisa Duarte ◽  
João Lopes Dias ◽  
Teresa Margarida Cunha
Keyword(s):  
Signal Intensity ◽  
Diffusion Weighted Imaging ◽  
Structural Information ◽  
Biological Tissues ◽  
High Signal ◽  
Female Pelvis ◽  
Diffusion Weighted ◽  
Apparent Diffusion ◽  
Mri Sequences ◽  
Magnetic Resonance Imaging Mri

Abstract Diffusion-weighted imaging (DWI) is widely used in protocols for magnetic resonance imaging (MRI) of the female pelvis. It provides functional and structural information about biological tissues, without the use of ionizing radiation or intravenous administration of contrast medium. High signal intensity on DWI with simultaneous low signal intensity on apparent diffusion coefficient maps is usually associated with malignancy. However, that pattern can also be seen in many benign lesions, a fact that should be recognized by radiologists. Correlating DWI findings with those of conventional (T1- and T2-weighted) MRI sequences and those of contrast-enhanced MRI sequences is mandatory in order to avoid potential pitfalls. The aim of this review article is the description of the most relevant physiological and benign pathological conditions of the female pelvis that can show restricted diffusion on DWI.

scholarly journals The role of MRI in Detection and Characterization of Benign Hepatic Focal Lesions

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
A F Abdelghany ◽  
E H Abdeldayem ◽  
S K Millad
Keyword(s):  
Signal Intensity ◽  
Management Plan ◽  
Hepatic Cyst ◽  
University Hospital ◽  
High Signal ◽  
Common Disease ◽  
Focal Lesions ◽  
Diffusion Weighted

Abstract Background The benign and malignant hepatic foci are a common disease in recent times. The most benign lesions are in non cirrhotic liver. The main goals of MRI liver techniques are detection and characterization of equivocal hepatic focal lesions with indeterminate results by other diagnostic modalities e.g. US or CT. Aim of the Study to describe the role of MRI in early detection and characterization of benign Hepatic focal lesions. Using unenhancement, contrast enhancement and diffusion weighted MR images; for better patient management plan. Patients and Methods This study conducted on 25 patients; four patients of them have 2 different HFL, suspicion of Hepatic focal lesions on the basis of US and/or CT. The study took place at Ain Shams University hospital. Results Present study revealed that maximum percentage of MRI finding in benign HFL is Hemangioma (37.93%) followed by Simple hepatic cyst (27.59%). The most common benign HFL are low signal intensity in T1 precontrast study and the most common benign HFL are High signal intensity in T2 precontrast study. Also, the most benign HFL show no restriction diffusion. Conclusion Benign hepatic focal lesions are frequently encountered in clinical practice and their characterization may be sometimes difficult. Magnetic resonance imaging MRI has more advantages than ultrasound, computed tomography CT in diagnosing and characterization of focal hepatic masses. With a combination of basic T1 and T2 weighted sequences, diffusion weighted imaging DWI, and use of contrast agents, most liver lesions can be adequately diagnosed.

scholarly journals Neurotized Free Muscle Flaps can Produce MRI Changes Mimicking Tumour Recurrence

Sarcoma ◽  
2005 ◽  
Vol 9 (3-4) ◽  
pp. 133-136
Author(s):  
J. K. O’Neill ◽  
J. A. Barrett ◽  
T. Cobley ◽  
V. Devaraj ◽  
D. A. T. Silver
Keyword(s):  
Signal Intensity ◽  
Pathological Condition ◽  
Soft Tissue Sarcomas ◽  
Muscle Flap ◽  
High Signal Intensity ◽  
High Signal ◽  
Muscle Flaps ◽  
Magnetic Resonance Imaging Mri ◽  
Mri Changes ◽  
T2 Weighted Images

Soft tissue sarcomas are investigated by magnetic resonance imaging (MRI) both for initial staging and follow-up. We describe the presence of increased signal on T2-weighted images caused by a neurotized muscle flap following reconstructive surgery. This raised concern about possible sarcoma recurrence that was not clinically evident. On post-operative imaging of sarcomas the presence of recurrent tumour is indicated by a mass and high signal intensity on T2-weighted images. However, high signal changes in skeletal muscle on T2-weighted images are not specific. In this case, the free functioning muscle transfer with neurotization of the flap mimicked recurrence on MR scan. High signal intensity on T2-weighted images in muscle is an indication of either a physiological change or a pathological condition and must be taken in context of the clinical picture.

Case 10.20

2014 ◽  
pp. 516-517
Author(s):  
Christine U. Lee ◽  
James F. Glockner
Keyword(s):  
Soft Tissue ◽  
Signal Intensity ◽  
Cystic Mass ◽  
High Signal Intensity ◽  
High Signal ◽  
Ssfp Image ◽  
Uterine Fundus

43-year-old woman with a uterine mass Axial fat-suppressed SSFP image (Figure 10.20.1) reveals a large, predominantly cystic mass in the uterine fundus that contains peripheral nodular soft tissue components. The soft tissue rim has high signal intensity on axial DWI (b=800 s/mm...

US Characterization of Soft Tissue Hemangiomas of Extremities: Correlation with MR Signal Intensity

1995 ◽  
Vol 33 (1) ◽  
pp. 131
Author(s):  
Kyung Sub Shinn ◽  
Sung Su Hwang ◽  
Mi Sook Sung ◽  
Hye Suk Jang ◽  
Jung Ik Yim
Keyword(s):  
Soft Tissue ◽  
Signal Intensity

scholarly journals COT-05 A CASE OF NEPALESE IN JAPAN SUSPECTED OF NEUROCYSTICERCOSIS

2019 ◽  
Vol 1 (Supplement_2) ◽  
pp. ii41-ii41
Author(s):  
Masataka Mikai ◽  
Ryo Matsuzaki ◽  
Chie Matsuura ◽  
Sayaka Terazono ◽  
Shumpei Ando ◽  
...  
Keyword(s):  
Tissue Reaction ◽  
Whole Body ◽  
High Signal ◽  
Enhancement Effect ◽  
Pathological Findings ◽  
Whole Body Ct ◽  
Pathological Result ◽  
The Central Nervous System ◽  
Magnetic Resonance Imaging Mri ◽  
The Right

Abstract INTRODUCTION Cystosis is the most common parasitic disease of the central nervous system. Especially in developing countries, it is one of the differential diagnosis of diseases that cause seizures. We report a case of a foreigner suspected of having neurocysticercosis. CASE A 36-year-old Nepalese visiting Japan for 2 years. Two days ago, she lost consciousness for a few seconds and was transferred to our hospital complaint of convulsions for about 1 minute. Head Computed Tomography (CT) revealed a mass lesion with a ring enhancement effect of about 10 mm in the right frontal lobe, with edema around it. Magnetic Resonance Imaging (MRI) shows T1WI low signal, T2WI high signal, and diffusion-weighted image with a light high signal. The ring-shaped enhancement effect was exhibited. Whole body CT showed no obvious lesions and blood tumor markers were negative. Various infections were negative, and cerebrospinal fluid cytology and culture were negative. POSTOPERATIVE COURSE From the surgical findings, brain abscesses such as cerebral tuberculoma were suspected, but various tests were negative. As a pathological result, the tumor had a capsule, and the inside showed necrotic tissue and fibrous granulation tissue reaction. There were no insects, and no obvious cells were identified by special staining. From the origin area, symptoms, and pathological findings, neurocysticercosis was most suspected. CONCLUSION We experienced a case of suspected neurocysticercosis that was difficult to diagnose from images and pathological findings. In neurocysticercosis, when the worm body dies, contrast-enhanced MRI shows a ring-like enhancement effect, and it is accompanied by surrounding edema, which may require differentiation from brain tumors.

Demonstration of Microsurgical Technique and Nuances for the Resection of a Midbrain Tectal Glioma Via the Transcollicular Approach: 3-Dimensional Operative Video

2020 ◽  
Author(s):  
Sima Sayyahmelli ◽  
Jian Ruan ◽  
Emel Avci ◽  
Mustafa K Başkaya
Keyword(s):  
Signal Intensity ◽  
Cystic Mass ◽  
World Health ◽  
High Signal ◽  
Third Ventriculostomy ◽  
Ataxic Gait ◽  
3 Dimensional ◽  
Postoperative Mri ◽  
Magnetic Resonance Imaging Mri ◽  
Health Organization

Abstract Tectal gliomas are a rare subset of intrinsic brainstem lesions. The microsurgical resection of these lesions remains a major challenge.1,2 Transcollicular approaches on one side, via the superior or inferior colliculi or both, are neurologically well tolerated without obvious or major auditory or oculomotor consequences. However, any postoperative acute visually triggered saccadic abnormalities caused by iatrogenic superior colliculus damage generally resolve during the postoperative period, as other oculomotor structures compensate for these functions in unilateral lesions.  In this surgical video, we present a 37-yr-old man with long-standing seizures, new onset headaches, progressive ataxic gait, and imbalance. Magnetic resonance imaging (MRI) showed a circumscribed nonenhancing dorsal midbrain cystic mass with compression on the aqueduct causing hydrocephalus. The lesion had a low signal intensity on T1-weighted images and a high signal intensity on T2-weighted images. The patient first underwent an endoscopic third ventriculostomy. Although his headaches greatly improved after the third ventriculostomy, he remained quite symptomatic in terms of gait imbalance and ataxia. The patient underwent a supracerebellar, infratentorial, transcollicular approach for resection of the tectal tumor. Simultaneously, motor and somatosensory evoked potentials were monitored.  Both the surgery and the postoperative course were uneventful, with postoperative MRI showing gross total resection of the mass, and histopathology indicating a WHO (World Health Organization) grade I pilocytic astrocytoma. The patient continued to do well without recurrence at 2-yr follow-up.  In this video, we demonstrate step-by-step microsurgical techniques for resecting these challenging tectal gliomas via the infratentorial-supracerebellar-transcollicular approach. The patient consented to the procedure and publication of his images.

MR characterization of post-irradiation soft tissue edema

1996 ◽  
Vol 25 (6) ◽  
pp. 537-543 ◽  
Author(s):  
M. L. Richardson ◽  
Gordon C. Zink-Brody ◽  
Randall M. Patten ◽  
Wui-Jin Koh ◽  
Ernest U. Conrad
Keyword(s):  
Soft Tissue ◽  
Post Irradiation ◽  
Tissue Edema

scholarly journals Skull base non-Hodgkin’s lymphoma

2017 ◽  
Vol 4 (12) ◽  
pp. 4086
Author(s):  
Muhammad Haruna ◽  
Prashant Gupta ◽  
Ganapathy Dhanasekar
Keyword(s):  
Skull Base ◽  
Rare Condition ◽  
High Signal ◽  
Primary Lymphoma ◽  
Diagnostic Challenge ◽  
Facial Numbness ◽  
Bone Cortex ◽  
Petrous Temporal Bone ◽  
Magnetic Resonance Imaging Mri ◽  
The Right

Primary skull base lymphoma accounts for 1% - 2% of all skull base tumours. It is a very rare condition, which poses a diagnostic challenge in clinical practice but needs early diagnosis and treatment. We present a case of primary lymphoma of the skull base in a 53-year-old woman, who was admitted with complaints of bilateral temporal pain, facial numbness, slurred speech, difficulty in swallowing and deafness. Computed tomography (CT) and Magnetic Resonance Imaging (MRI) showed ill-defined destruction of the petrous temporal bone with a high signal area noted on T2 weighted images in the right temporal lobe which initially was thought to be skull base osteomyelitis. However, a finding of a thin subperiosteal dense soft tissue in the left parieto-occipital region with intact adjacent bone cortex similar in appearance to the of the primary skull base pathology was seen which alerted the team to possible diagnosis of skull base lymphoma.

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