scholarly journals Cerebral cortical T1 hyperintensity

2021 ◽  
Author(s):  
Yahya Baba
Keyword(s):  
T1 Hyperintensity

Imaging findings of trichilemmal cyst and proliferating trichilemmal tumour

2021 ◽  
pp. 197140092110177
Author(s):  
Masaya Kawaguchi ◽  
Hiroki Kato ◽  
Natsuko Suzui ◽  
Tatsuhiko Miyazaki ◽  
Hiroyuki Tomita ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Hounsfield Units ◽  
Soft Tissue Density ◽  
Cutaneous Lesions ◽  
Imaging Characteristics ◽  
Trichilemmal Cyst ◽  
T1 Hyperintensity

Purpose The purpose of this study was to evaluate computed tomography and magnetic resonance imaging of benign trichilemmal cysts and proliferating trichilemmal tumours. Methods Nineteen histologically confirmed cutaneous lesions with trichilemmal keratinisation (12 trichilemmal cysts and seven proliferating trichilemmal tumours) were enrolled. Among them, 10 lesions (six trichilemmal cysts and four proliferating trichilemmal tumours) were examined by computed tomography, while 13 lesions (eight trichilemmal cysts and five proliferating trichilemmal tumours) were examined by magnetic resonance imaging. Computed tomography and magnetic resonance imaging characteristics were retrospectively reviewed. RESULTS Sixteen lesions (84%, 10 trichilemmal cysts and six proliferating trichilemmal tumours) occurred on the scalp. Lobulated margins were observed in five lesions (26%, three trichilemmal cysts and two proliferating trichilemmal tumours). With respect to computed tomography attenuation, calcification (>200 Hounsfield units) was observed in seven lesions (70%, five trichilemmal cysts and two proliferating trichilemmal tumours), hyperdense areas (≥80 and ≤200 Hounsfield units) in six (60%, three trichilemmal cysts and three proliferating trichilemmal tumours), and soft tissue density areas (<80 Hounsfield units) in nine (90%, five trichilemmal cysts and four proliferating trichilemmal tumours). On T1-weighted images, intratumoral hyperintensity was only observed in eight trichilemmal cysts but no proliferating trichilemmal tumours (100% vs. 0%, P<0.01). On T2-weighted images, hypointense rim and intratumoral hypointensity was observed in all 13 lesions (100%, eight trichilemmal cysts and five proliferating trichilemmal tumours), and linear or reticular hypointensity was observed in 10 (77%, six trichilemmal cysts and four proliferating trichilemmal tumours). Conclusion Trichilemmal cysts and proliferating trichilemmal tumours predominantly occurred on the scalp with calcification, and usually exhibited linear or reticular T2 hypointensity. Intratumoral T1 hyperintensity may be a useful imaging feature for differentiating trichilemmal cysts from proliferating trichilemmal tumours.

scholarly journals Neurologic Spectrum of Chronic Liver Failure and Basal Ganglia T1 Hyperintensity on Magnetic Resonance Imaging

2005 ◽  
Vol 62 (9) ◽  
pp. 1385 ◽  
Author(s):  
Kevin J. Klos ◽  
J. Eric Ahlskog ◽  
Keith A. Josephs ◽  
Robert D. Fealey ◽  
Clayton T. Cowl ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Basal Ganglia ◽  
Magnetic Resonance ◽  
Liver Failure ◽  
Chronic Liver ◽  
Resonance Imaging ◽  
Chronic Liver Failure ◽  
T1 Hyperintensity

scholarly journals Serial neuroimaging in infants with abusive head trauma: timing abusive injuries

2013 ◽  
Vol 12 (2) ◽  
pp. 110-119 ◽  
Author(s):  
Ray Bradford ◽  
Arabinda K. Choudhary ◽  
Mark S. Dias
Keyword(s):  
Head Trauma ◽  
Small Sample Size ◽  
Medical Center ◽  
Abusive Head Trauma ◽  
Time Frame ◽  
Small Sample ◽  
Ct Scans ◽  
Imaging Studies ◽  
T1 Hyperintensity ◽  
Clinical Records

Object The appearance and evolution of neuroimaging abnormalities following abusive head trauma (AHT) is important for establishing the time frame over which these injuries might have occurred. From a legal perspective this frames the timing of the abuse and therefore identifies and excludes potential perpetrators. A previous pilot study involving 33 infants with AHT helped to refine the timing of these injuries but was limited by its small sample size. In the present study, the authors analyzed a larger group of 210 cases involving infants with AHT to chronicle the first appearance and evolution of radiological (CT, MRI) abnormalities. Methods All children younger than 24 months admitted to the Penn State Hershey Medical Center with AHT over a 10-year period were identified from a medical record review; the time of injury was determined through an evaluation of the clinical records. All imaging studies were analyzed, and the appearance and evolution of abnormalities were chronicled on serial neuroimaging studies obtained in the days and weeks after injury. Results One hundred five infants with specific injury dates and available imaging studies were identified; a subset of 43 children additionally had documented times of injury. In infants with homogeneously hyperdense subdural hematomas (SDHs) on initial CT scans, the first hypodense component appeared within the SDH between 0.3 and 16 days after injury, and the last hyperdense subdural component disappeared between 2 and 40 days after injury. In infants with mixed-density SDHs on initial scans, the last hyperdense component disappeared between 1 and 181 days. Parenchymal hypodensities appeared on CT scans performed as early as 1.2 hours, and all were visible within 27 hours after the injury. Rebleeding into SDHs was documented in 17 cases (16%) and was always asymptomatic. Magnetic resonance imaging of the brain was performed in 49 infants. Among those with SDH, 5 patterns were observed. Patterns I and II reflected homogeneous SDH; Pattern I (T1 hyperintensity and T2/FLAIR hypointensity, “early subacute”) more commonly appeared on scans performed earlier after injury compared with Pattern II (T1 hyperintensity and T2/FLAIR hyperintensity, “late subacute”), although there was considerable overlap. Patterns III and IV reflected heterogeneous SDH; Pattern III contained relatively equal mixtures having different intensities, whereas Pattern IV had fluid that was predominantly T1 hypointense and T2/FLAIR hyperintense. Again, Pattern III more commonly appeared on scans performed earlier after injury compared with Pattern IV, although there was significant overlap. Conclusions These data extend the preliminary data reported by Dias and colleagues and provide a framework upon which injuries in AHT can be timed as well as the limitations on such timing estimates.

scholarly journals Papillary Tumor of the Pineal Region: MR Signal Intensity Correlated to Histopathology

2015 ◽  
Vol 2015 ◽  
pp. 1-4
Author(s):  
Marcos Rosa Junior ◽  
Antonio Jose da Rocha ◽  
Adriano Zanon da Silva ◽  
Sergio Rosemberg
Keyword(s):  
Subcommissural Organ ◽  
Pineal Region ◽  
World Health ◽  
Pineal Tumor ◽  
Imaging Diagnosis ◽  
Posterior Commissure ◽  
Papillary Tumor ◽  
The World ◽  
T1 Hyperintensity ◽  
Health Organization

Tumors of the pineal region are rare and can be challenging to differentiate by imaging. Papillary tumor of the pineal region (PTPR) was recently recognized as a neoplasm in the World Health Organization (WHO) 2007 classification, arising from specialized ependymocytes in the subcommissural organ, which is located in the pineal region. It is a rare histological type of pineal tumor with only a few cases reported. Here, we describe a case of histologically confirmed PTPR in a 17-year-old man who presented with a headache. A literature review was performed to clarify the clinical, radiological, and pathological features of PTPR. Pineal neoplasms do not have pathognomonic imaging findings; however, we discuss T1 hyperintensity, which is a key for imaging diagnosis according to recent reports. In particular, if the hyperintensity in T1 is not due to fat, calcification, melanin, or hemorrhage in a mass of the posterior commissure or pineal region, the diagnosis of a PTPR may be suggested, as observed in this case.

scholarly journals Noncontrast vestibular schwannoma surveillance imaging including an MR cisternographic sequence: is there a need for postcontrast imaging?

2019 ◽  
Vol 131 (2) ◽  
pp. 549-554 ◽  
Author(s):  
Karen Buch ◽  
Amy Juliano ◽  
Konstantina M. Stankovic ◽  
Hugh D. Curtin ◽  
Mary Beth Cunnane
Keyword(s):  
Vestibular Schwannoma ◽  
Relevant Information ◽  
Vestibular Schwannomas ◽  
Mr Images ◽  
Gadolinium Contrast ◽  
Additional Information ◽  
Significant Difference ◽  
T1 Hyperintensity ◽  
Temporal Bones ◽  
Mr Sequences

OBJECTIVEThe purpose of this study was to evaluate the use of a noncontrast MRI protocol that includes a cisternographic sequence (CISS/FIESTA/3D DRIVE) compared to a protocol that includes a gadolinium-enhanced sequence in order to determine whether a noncontrast approach could be utilized to follow vestibular schwannomas.METHODSA total of 251 patients with vestibular schwannomas who underwent MRI of the temporal bones that included both cisternographic sequence and postcontrast T1 imaging between January 2000 and January 2016 for surveillance were included in this retrospective study. The size of the vestibular schwannomas was independently assessed on a noncontrast MR cisternographic sequence and compared to size measurements on a postcontrast sequence. The evaluation of intralesional cystic components (identified as T2 signal hyperintensity) and hemorrhagic components (identified with intrinsic T1 hyperintensity) on noncontrast MR sequences was compared to evaluation on postcontrast MR sequences to determine whether additional information could be derived from the postcontrast sequences. Additionally, any potentially clinically significant, incidentally detected findings on the postcontrast T1 sequences were documented and compared with the detection of these findings on the precontrast images.RESULTSNo significant difference in vestibular schwannoma size was found when comparing measurements made on the images obtained with the MR cisternographic sequence and those made on images obtained with the postcontrast sequence (p = 0.99). Noncontrast MR images were better (detection rate of 87%) than postcontrast images for detection of cystic components. Noncontrast MR images were also better for identifying hemorrhagic components. No additional clinically relevant information regarding the tumors was identified on the postcontrast sequences.CONCLUSIONSBased on the results of this study, a noncontrast MR protocol that includes a cisternographic sequence would be sufficient for the accurate characterization of size and signal characteristics of vestibular schwannomas, obviating the need for gadolinium contrast administration for the routine surveillance of these lesions.

Spatiotemporal Pattern of Gadodiamide-Related T1 Hyperintensity Increase Within the Deep Brain Nuclei

2018 ◽  
Vol 53 (12) ◽  
pp. 748-754 ◽  
Author(s):  
Guillaume P.O. Marie ◽  
Polona Pozeg ◽  
Reto A. Meuli ◽  
Philippe Maeder ◽  
Joachim Forget
Keyword(s):  
Spatiotemporal Pattern ◽  
Brain Nuclei ◽  
T1 Hyperintensity ◽  
Deep Brain

scholarly journals Intracranial subdural osteoma

2020 ◽  
Vol 18 ◽  
pp. 205873922092685
Author(s):  
Yunna Yang ◽  
Zheng Gu ◽  
Yinglun Song
Keyword(s):  
Dura Mater ◽  
Histopathological Examination ◽  
Surgical Excision ◽  
Benign Neoplasms ◽  
Resonance Imaging ◽  
Inner Surface ◽  
History Of ◽  
Magnetic Resonance Imaging Mri ◽  
T1 Hyperintensity ◽  
The Right

Subdural osteomas are extremely rare benign neoplasms. Here, we report the case of a 35-year-old female patient with a right frontal and parietal subdural osteoma. The patient presented with a 2-year history of intermittent headache and fatigue. Computerized tomography (CT) scan showed a high-density lesion attached to the inner surface of the right frontal and parietal skull. Magnetic resonance imaging (MRI) demonstrated T1 hyperintensity and T2 hypointensity of the lesion. Intraoperatively, the hard mass was located in subdural space and attached to the dura mater. Histopathological examination revealed lamellated bony trabeculae lined by osteoblasts and the intertrabecular marrow spaces occupied by adipose tissue. The patient underwent neurosurgical resection and recovered without complication. Surgical excision is recommended to extract the symptomatic lesions with overlying dura mater.

Sign in / Sign up

Export Citation Format

Share Document