Diffusion-Weighted Magnetic Resonance Imaging of Organized Subdural Hematoma-Case Report-

Kuwahara, Seikou; Miyake, Hirohisa; Fukuoka, Muneyoshi; Koan, Yoko; Ono, Yuko; Moriki, Akihito; Mori, Koreaki; Mokudai, Toshihiko; Uchida, Yasufumi

doi:10.2176/nmc.44.376

Cited by 17 publications

(22 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, about 0.5-2% of them develop thick membranes and/or multiple septations turning into encapsulated masses of predominantly solid consistency that require a craniotomy to be successfully removed. 1,9,12,13,17,21,23,25) This latter uncommon SDH subtype is known as organized chronic SDH. A crescent shape and a density usually similar or lower to that of the adjacent cerebral parenchyma are the usual computed tomography (CT) features of both liquid and organized chronic SDHs.…”

Section: Introductionmentioning

confidence: 99%

Acute Epidural-Like Appearance of an Encapsulated Solid Non-organized Chronic Subdural Hematoma -Case Report-

Prieto

Pascual

Subhi-Issa

et al. 2010

Neurol. Med. Chir.(Tokyo)

View full text Add to dashboard Cite

We report the exceptional case of an encapsulated solid non-organized chronic subdural hematoma (SDH) in a 67-year-old woman that was admitted with acute hemiplegia followed by rapid deterioration in consciousness 5 months after a minor head trauma. Computed tomography (CT) showed an extracerebral biconvex shaped hyperdense mass that led to the misdiagnosis of an acute epidural hematoma. Urgent craniotomy revealed an encapsulated mass filled with solid fresh clot in the subdural space. Complete evacuation of this SDH, including both its inner and outer membranes, was achieved, and the patient recovered successfully. Histological analysis confirmed that the content of the hematoma corresponded to a newly formed clot that was enclosed between an inner membrane, composed of two collagen layers, and an outer membrane with a three layered structure. Chronic SDH may seldom present as an encapsulated solid non-organized lesion that consists of a fibrous capsule enclosing a fresh clot and lacking the thick fibrous septations that typically connect the inner and outer membranes of organized chronic SDH. This entity mimics the clinical course and radiological appearance of acute epidural hematomas and should be considered in the differential diagnosis of extracerebral hyperdense biconvex shaped lesions.

show abstract

Section: Introductionmentioning

confidence: 99%

Acute Epidural-Like Appearance of an Encapsulated Solid Non-organized Chronic Subdural Hematoma -Case Report-

Prieto

Pascual

Subhi-Issa

et al. 2010

Neurol. Med. Chir.(Tokyo)

View full text Add to dashboard Cite

show abstract

“…Diffusion-weighted magnetic resonance (MR) imaging shows characteristic findings in cases of organized subdural hematoma 8) and chronic subdural hematoma, 6) and the apparent diffusion coefficient (ADC) values may be useful for differentiating solid from liquid hematoma. 6,8) However, the diffusionweighted MR imaging characteristics of traumatic subacute subdural hematomas have been rarely reported, 7) and the potential of diffusion-weighted MR imaging for the evaluation of traumatic subacute subdural hematoma has not been established.…”

Section: Introductionmentioning

confidence: 99%

“…6,8) However, the diffusionweighted MR imaging characteristics of traumatic subacute subdural hematomas have been rarely reported, 7) and the potential of diffusion-weighted MR imaging for the evaluation of traumatic subacute subdural hematoma has not been established. Here we describe five cases of traumatic subdural hematoma in the subacute stage and evaluate diffusion-weighted imaging and the ADC values of the hematoma as indicators for the operative procedure.…”

Section: Introductionmentioning

confidence: 99%

Diffusion-Weighted Imaging of Traumatic Subdural Hematoma in the Subacute Stage-Five Case Reports-

Kuwahara¹,

Fukuoka²,

Koan³

et al. 2005

Neurol. Med. Chir.(Tokyo)

Self Cite

View full text Add to dashboard Cite

Five cases of traumatic subdural hematomas in the subacute stage (from 7 to 20 days after head injury) were treated in one male and four females, aged from 63 to 82 years, with evacuation via craniotomy in three and aspiration via burr hole surgery in two. All hematomas were evaluated by T 1 -, T 2 -, and diffusion-weighted magnetic resonance imaging, and measurement of the apparent diffusion coefficient (ADC). Diffusion-weighted imaging showed the hematoma as a crescent high intensity area with a low intensity rim close to the brain surface (two-layered structure) in four cases and as high intensity with low intensity components in one case. The high intensity areas under the dura mater on diffusion-weighted imaging appeared as homogeneous high intensity on T 1 -and T 2 -weighted imaging in four cases, and inhomogeneous high intensity on T 1 -and isointensity on T 2 -weighted imaging in one case. The mean ADC value of the high intensity areas was 0.58 ± 0.23 (mean ± standard deviation) × 10 -3 mm 2 /sec. The operative findings revealed the high intensity areas as solid clots. The low intensity areas on diffusion-weighted imaging appeared as homogeneous high intensity in four cases and inhomogeneous isointensity with high intensity components in one case on T 1 -and T 2 -weighted imaging. The mean ADC value of the low intensity areas was 2.03 ± 0.27 × 10 -3 mm 2 /sec. The operative findings revealed the low intensity areas as mixtures of resolved clot and cerebrospinal fluid. Diffusion-weighted imaging showed the characteristic two-layered structure in traumatic subdural hematomas in the subacute stage, and analysis of the ADC values was useful for differentiating solid from liquid hematoma and for selection of the surgical procedure.

show abstract

“…Due to the finding of profound motion restriction of the water molecules in the lesion, however, liquefaction necrosis or pure cystic nature could be easily excluded, but blood clots or nonliquefactive necrosis would show similar diffusion restriction (15,16). Our second case showed no remarkable enhancing component even at the periphery of the lesion.…”

Section: Discussionmentioning

confidence: 70%

Lymphoepithelial cysts in the pancreas: MRI of two cases with emphasis of diffusion‐weighted imaging characteristics

Nam

Hwang

Kim

et al. 2010

Magnetic Resonance Imaging

View full text Add to dashboard Cite

Pancreatic lymphoepithelial cysts (LECs) are rare pancreatic cystic lesions filled with keratinized material, lined by mature, keratinizing squamous epithelium and surrounded by lymphoid tissue containing few lymphoid follicles. We report two cases of surgically confirmed pancreatic LECs showing a profound restriction of water molecules on diffusion-weighted (DWI) magnetic resonance imaging (MRI). For pancreatic cystic lesions showing lack of molecular motion on DWI with or without thin marginal enhancement on contrast material-enhanced imaging, LECs consisting of internally keratinized materials with restricted diffusion should be considered in differential diagnoses even though they cannot always be easy to distinguish from other focal pancreatic lesions containing mucin, blood clot, or nonliquefactive necrosis.

show abstract

Diffusion-Weighted Magnetic Resonance Imaging of Organized Subdural Hematoma-Case Report-

Cited by 17 publications

References 14 publications

Acute Epidural-Like Appearance of an Encapsulated Solid Non-organized Chronic Subdural Hematoma -Case Report-

Acute Epidural-Like Appearance of an Encapsulated Solid Non-organized Chronic Subdural Hematoma -Case Report-

Diffusion-Weighted Imaging of Traumatic Subdural Hematoma in the Subacute Stage-Five Case Reports-

Lymphoepithelial cysts in the pancreas: MRI of two cases with emphasis of diffusion‐weighted imaging characteristics

Contact Info

Product

Resources

About