Angiomyolipoma of the Kidney

In six patients with angiomyolipoma of the kidney, five showed a typical pattern in T1, proton and T2 weighted images, with magnetic resonance imaging (MRI). Angiomyolipoma is recognized by its characteristic fatty tissue components, which result in high signal intensity in T1 and proton weighted images and a low signal in T2 weighted images. Five of the patients were also examined with ultrasonography (US); in four of these, the tumor could be recognized by its echodense pattern. Computed tomography (CT) was slightly less sensitive; three out of six examinations failed to produce a definite diagnosis. Instead of the typical low attenuation values of fat, Hounsfield units similar to either muscle or kidney tissue were observed in these 3 cases. In conclusion, the specific diagnosis of angiomyolipoma depends on the amount of fatty tissue present at MRI, CT, and sonography.

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Magnetic resonance imaging of spinal arteriovenous malformations

Journal of Neurosurgery ◽

10.3171/jns.1987.66.6.0830 ◽

1987 ◽

Vol 66 (6) ◽

pp. 830-834 ◽

Cited By ~ 75

Author(s):

John L. Doppman ◽

Giovanni Di Chiro ◽

Andrew J. Dwyer ◽

Joseph L. Frank ◽

Edward H. Oldfield

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Arteriovenous Malformations ◽

High Signal ◽

Resonance Imaging ◽

Content Type ◽

Spinal Arteriovenous Malformations ◽

Magnetic Resonance Imaging Mri ◽

Spinal Avm ◽

Fine Print

✓ Magnetic resonance imaging (MRI) was performed on 12 patients with spinal arteriovenous malformations (AVM's). Six lesions were intramedullary, five were dural, and one was in a posterior extramedullary location. Serpentine filling defects similar to the classic myelographic findings were demonstrated within the high-signal cerebrospinal fluid on T2-weighted coronal scans. The intramedullary nidus was identified by MRI as an area of low-signal intensity within the cord in all six intramedullary AVM's. Neither the dural nor the posterior extramedullary lesions showed intramedullary components. It is concluded that MRI may noninvasively provide the initial diagnosis of a spinal AVM and distinguish intramedullary from dural and extramedullary lesions.

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Orbital Schwannoma: Case Report and Review

Arquivos Brasileiros de Neurocirurgia Brazilian Neurosurgery ◽

10.1055/s-0039-1693683 ◽

2019 ◽

Vol 38 (03) ◽

pp. 199-202 ◽

Cited By ~ 1

Author(s):

Ricardo Lourenço Caramanti ◽

Mário José Goes ◽

Feres Chaddad ◽

Lucas Crociati Meguins ◽

Dionei Freitas de Moraes ◽

...

Keyword(s):

Clinical Symptoms ◽

Previous History ◽

Mass Effect ◽

Complete Resection ◽

High Signal ◽

Resonance Imaging ◽

History Of Disease ◽

Orbital Pain ◽

History Of ◽

Magnetic Resonance Imaging Mri

AbstractOrbital schwannomas are rare, presenting a rate of incidence between 1 and 5% of all orbital lesions. Their most common clinical symptoms are promoted by mass effect, such as orbital pain and proptosis. The best complementary exam is the magnetic resonance imaging (MRI), which shows low signal in T1, high signal in T2, and heterogeneous contrast enhancement. The treatment of choice is surgical, with adjuvant radiotherapy if complete resection is not possible. We report the case of a 24-year-old male patient with orbital pain and proptosis, without previous history of disease. The MRI showed a superior orbital lesion compatible with schwannoma, which was confirmed by biopsy after complete resection using a fronto-orbital approach.

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Magnetic resonance imaging after frontal sinus surgery with fat obliteration

The Journal of Laryngology & Otology ◽

10.1017/s0022215100132189 ◽

1995 ◽

Vol 109 (11) ◽

pp. 1115-1119 ◽

Cited By ~ 12

Author(s):

R. Keerl ◽

R. Weber ◽

G. Kahle ◽

W. Draf ◽

J. Constantinidis ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Connective Tissue ◽

Frontal Sinus ◽

Spin Echo ◽

Sinus Surgery ◽

Fast Spin Echo ◽

Fatty Tissue ◽

Resonance Imaging ◽

Magnetic Resonance Imaging Mri

AbstractThe obliteration of the frontal sinus via an osteoplastic approach is performed with the aim of achieving a permanent ‘switching off’ by final and conclusive clearing out. For this, freshly harvested abdominal fat has shown itself to be the best clinically. It is possible to demonstrate the vitality of fat transplanted into the frontal sinus without an operation i.e. by a macroscopical and histological examination using magnetic resonance imaging (MRI). The magnetic resonance examinations were carried out on a supraconductive 0.5 T Magnet (Gyroscan T.S.II, Philips Medicine Systems, Eindhoven, Netherlands) with a quadrature (square) head spool. We produced T1-weighted spin echo images (TR: 450–550 ms; TE: 20–25 ms), T2-weighted fast spin echo images or in double-echo technique in transverse orientation (Turbo SE or TR: 2000–2500 ms; TE: 50–90 ms) and short tau inversion recovery (STIR) sequences for fat suppression (TJ: 140 ms; TR: 1400 ms; TE: 30 ms). The fat implanted into the frontal sinus of 11 patients aged 22–65 years, having undergone an osteoplastic frontal sinus operation with obliteration, was examined post-operatively by MRI. Objectives were the time-dependent distribution of portions of vital fatty or connective tissue, the eventual development of necroses or cysts as well as recurrences, inflammatory complications or re-epithelization of the frontal sinus four to 24 months postoperatively. In only six out of 11 cases was vital fatty tissue found. Fatty necrosis occurred five times, whereas in four cases a transformation into granulation tissue and in one case into connective tissue could be seen. All 11 patients were complaint-free. Long-term observations are needed to see if differences in the recurrence rate of frontal sinus disease are dependent on whether the implanted fat remains vital or necrosed and transformed.

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Transarterial Onyx embolization of jugular foramen dural arteriovenous fistula with spinal venous drainage manifesting as myelopathy—a case report and review of the literature

Interventional Neuroradiology ◽

10.1177/1591019916654431 ◽

2016 ◽

Vol 22 (5) ◽

pp. 579-583 ◽

Cited By ~ 5

Author(s):

Hengwei Jin ◽

Xianli Lv ◽

Youxiang Li

Keyword(s):

Arteriovenous Fistula ◽

Dural Arteriovenous Fistula ◽

Brain Mri ◽

Venous Drainage ◽

Jugular Foramen ◽

Endovascular Embolization ◽

High Signal ◽

Resonance Imaging ◽

Magnetic Resonance Imaging Mri ◽

Progressive Weakness

We report a rare case of jugular foramen dural arteriovenous fistula (DAVF) with spinal venous drainage. A 48-year-old woman suffered from progressive weakness of lower extremities and incontinence of urine and feces for 14 days. Magnetic resonance imaging (MRI) revealed a tortuous posterior medullary vein at C2–T2 and ischemic signal at C2–C4 of the spinal cord. Brain MRI revealed an abnormal high signal near the left jugular foramen. Digital subtraction angiography of the spinal vascular was negative, while brain angiography showed a left jugular foramen DAVF with spinal perimedullary venous drainage. The patient recovered completely soon after endovascular embolization with Onyx-18. Diagnosis of a DAVF presenting with myelopathy is challenging. Early diagnosis and treatment are essential for a favorable outcome.

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Lingual dermoid cyst with congenital discharging sinus: a rare entity

The Journal of Laryngology & Otology ◽

10.1017/s002221511200268x ◽

2012 ◽

Vol 127 (2) ◽

pp. 211-214 ◽

Cited By ~ 3

Author(s):

Z Sun ◽

L Sun ◽

Y Gao ◽

X Ma

Keyword(s):

Computed Tomography ◽

English Language ◽

Fatty Tissue ◽

Rare Entity ◽

Hounsfield Units ◽

Radiological Features ◽

Computed Tomography Images ◽

Attenuation Values ◽

Congenital Fistula ◽

Language Literature

AbstractObjective:There have been few reports of lingual dermoid cysts with a congenital discharging fistula. We report such a case, which mimicked lipoma on computed tomography, and we discuss relevant clinical and radiological features.Method:We present a case report and a review of the English language literature concerning lingual dermoid cysts either mimicking lipoma or with a congenital discharging sinus.Results:A 35-year-old man presented with a lingual mass associated with a congenital fistula in the midline of the tongue dorsum, which discharged abnormal secretions. Computed tomography images showed that the lesion was well defined and contained homogeneous fatty tissue giving computed tomography attenuation values of −120 Hounsfield units.Conclusion:Lingual dermoid cysts may develop with a midline discharging fistula, and may exhibit radiological similarity to lipomas on computed tomography.

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Neurotized Free Muscle Flaps can Produce MRI Changes Mimicking Tumour Recurrence

Sarcoma ◽

10.1080/13577140500340484 ◽

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.

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Clinical and imaging features of carcinosarcoma of the uterus and cervix

Insights into Imaging ◽

10.1186/s13244-021-01084-5 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Liming Li ◽

Wenpeng Huang ◽

Kangkang Xue ◽

Leiyu Feng ◽

Yijing Han ◽

...

Keyword(s):

Malignant Tumors ◽

High Signal ◽

Imaging Features ◽

Mri Imaging ◽

Diffusion Weighted Image ◽

Resonance Imaging ◽

Endometrial Thickening ◽

Staging Accuracy ◽

Magnetic Resonance Imaging Mri ◽

Ct And Mri

Abstract Aim The purpose of our study was to analyze the clinical and imaging features of uterine carcinosarcoma (UCS) and cervical carcinosarcoma (CCS), and to explore the diagnostic and staging accuracy of computed tomography (CT) and magnetic resonance imaging (MRI) examinations. Methods 41 patients including 37 with UCS and 4 with CCS from July 2011 to September 2020 were enrolled in the study. Of the 37 UCS cases, 7 had CT images, 27 had MRI images, and 3 had both CT and MRI images. The Clinical data, CT or MRI imaging findings were analyzed. Diagnosis and staging accuracy of CT and MRI images were also analyzed. Results Carcinosarcoma usually occurs in postmenopausal women (40/41), with the typical clinical symptom being vaginal bleeding (33/41). The CA125 degree was significantly different between the two invasion depth groups (p = 0.011). Most uterine carcinosarcomas showed unclear boundaries, uneven density, low or equal signal on T1WI, high or mixed signal on T2WI, uneven high signal on diffusion-weighted image (DWI), and mild enhancement. The diagnostic accuracies of CT and MRI for carcinosarcoma were 0% and 3.33%, respectively. The diagnostic accuracy for malignant tumors on CT and MRI was 50% and 83.33%, respectively. Conclusions Carcinosarcoma lesions presented with huge mass filling in the cavity, and some presented with small polypoid lesions or endometrial thickening. Evaluation of lymph node metastasis is a significant challenge for imaging staging.

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Two cases of hepatocellular carcinoma with hypointense signals on T2-weighted images of magnetic resonance imaging(MRI).

Kanzo ◽

10.2957/kanzo.32.657 ◽

1991 ◽

Vol 32 (6) ◽

pp. 657-663

Author(s):

Kazuhiko KITA ◽

Masaaki EBARA ◽

Sakae WATANABE ◽

Yuji MATSUSHIRO ◽

Masaharu YOSHIKAWA ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Hepatocellular Carcinoma ◽

Magnetic Resonance ◽

Resonance Imaging ◽

Magnetic Resonance Imaging Mri ◽

T2 Weighted Images

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Silicone-induced Penile Sclerosing Lipogranuloma: Magnetic Resonance Imaging Findings

Journal of Clinical Imaging Science ◽

10.4103/2156-7514.175084 ◽

2016 ◽

Vol 6 ◽

pp. 3 ◽

Cited By ~ 7

Author(s):

Athina C Tsili ◽

Olga N Xiropotamou ◽

Michael Nomikos ◽

Maria I Argyropoulou

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Magnetization Transfer ◽

Fatty Tissue ◽

Resonance Imaging ◽

Imaging Tool ◽

First Case ◽

Contrast Enhanced ◽

Mri Protocol ◽

Magnetic Resonance Imaging Mri

Sclerosing lipogranuloma is a rare benign disease, representing a peculiar granulomatous reaction of fatty tissue. The majority of cases are secondary to injection of exogenous foreign bodies, such as silicone, paraffin, mineral, or vegetable oils. To the best of our knowledge, we present the first case of a silicone-induced penile lipogranuloma in a 52-year-old man evaluated with a multiparametric magnetic resonance imaging (MRI) protocol, including diffusion-weighted imaging, magnetization transfer imaging, and dynamic contrast-enhanced MRI. MRI of the penis by combining both conventional and functional information represents an important imaging tool in the preoperative workup of silicone-induced penile lipogranuloma.

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An Unusual Ovarian Mucinous Borderline Tumor with a Large Solid Component

Case Reports in Radiology ◽

10.1155/2019/1402736 ◽

2019 ◽

Vol 2019 ◽

pp. 1-4

Author(s):

Eito Kozawa ◽

Kaiji Inoue ◽

Mitsutake Yano ◽

Masanori Yasuda ◽

Kosei Hasegawa ◽

...

Keyword(s):

Signal Intensity ◽

Surgical Intervention ◽

Solid Component ◽

High Signal ◽

Pelvic Cavity ◽

Borderline Tumor ◽

Resonance Imaging ◽

Mri Findings ◽

Ovarian Epithelial Tumors ◽

Magnetic Resonance Imaging Mri

Herein, we report magnetic resonance imaging (MRI) findings of a mucinous borderline tumor of the ovary, which we observed as a mainly solid tumor with large solid components in the lower pelvic cavity. The appearance of ovarian epithelial tumors on imaging is often complex. Cystic to solid appearing masses may be observed, and they often resemble epithelial carcinoma. Due to mucinous or hemorrhage components of packed small or microcystic components, MRI depicts slightly high signal intensity on T1-weighted images and low signal intensity on T2-weighted images. Mucinous borderline tumor of the ovary with a large solid component is very rare, but it is clinically important to recognize the possibility of mucinous borderline tumor to avoid unnecessary surgical intervention.

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