Pub Date : 2024-04-02DOI: 10.1177/19714009241242642
Alexandre Boutet, Hyo Jin Son, Mikail Malik, Samuel S Haile, Andrew Z Yang, Vivek Pai, J. Germann, Daniel M Mandell
BACKGROUND AND PURPOSE Perivascular spaces (PVS) are interstitial fluid-filled spaces surrounding blood vessels traversing the deep gray nuclei and white matter of the brain. These are commonly encountered on CT and MR imaging and are generally asymptomatic and of no clinical significance. However, occasional changes in the size of focal PVS, for example, when enlarging, may mimic pathologies including neoplasms and infections, hence potentially confounding radiological interpretation. Given these potential diagnostic issues, we sought to better characterize common clinical and imaging features of focal PVS demonstrating size fluctuations. MATERIALS AND METHODS Upon institutional approval, we retrospectively identified 4 cases demonstrating PVS with size changes at our institution. To supplement our cases, we also performed a literature review, which identified an additional 14 cases. Their clinical and imaging data were analyzed to identify characteristic features. RESULTS Of the 18 total cases (including the 4 institutional cases), 10 cases increased and 8 decreased in size. These focal PVS ranged from 0.4-4.5 cm in size. Whereas a decrease in size did not represent a diagnostic issue, focal increase in size of PVS led to concerning differential diagnoses in at least 30% of the radiology reports. These enlarging PVS were most found in the basal ganglia and temporal lobe, and in patients with previous brain radiation treatment. CONCLUSION Focal size change of PVS can occur, especially years after brain radiation treatment. Being cognizant of this benign finding is important to consider in the differential diagnosis to avoid undue patient anxiety or unnecessary medical intervention.
{"title":"Enlarging and shrinking focal perivascular spaces.","authors":"Alexandre Boutet, Hyo Jin Son, Mikail Malik, Samuel S Haile, Andrew Z Yang, Vivek Pai, J. Germann, Daniel M Mandell","doi":"10.1177/19714009241242642","DOIUrl":"https://doi.org/10.1177/19714009241242642","url":null,"abstract":"BACKGROUND AND PURPOSE\u0000Perivascular spaces (PVS) are interstitial fluid-filled spaces surrounding blood vessels traversing the deep gray nuclei and white matter of the brain. These are commonly encountered on CT and MR imaging and are generally asymptomatic and of no clinical significance. However, occasional changes in the size of focal PVS, for example, when enlarging, may mimic pathologies including neoplasms and infections, hence potentially confounding radiological interpretation. Given these potential diagnostic issues, we sought to better characterize common clinical and imaging features of focal PVS demonstrating size fluctuations.\u0000\u0000\u0000MATERIALS AND METHODS\u0000Upon institutional approval, we retrospectively identified 4 cases demonstrating PVS with size changes at our institution. To supplement our cases, we also performed a literature review, which identified an additional 14 cases. Their clinical and imaging data were analyzed to identify characteristic features.\u0000\u0000\u0000RESULTS\u0000Of the 18 total cases (including the 4 institutional cases), 10 cases increased and 8 decreased in size. These focal PVS ranged from 0.4-4.5 cm in size. Whereas a decrease in size did not represent a diagnostic issue, focal increase in size of PVS led to concerning differential diagnoses in at least 30% of the radiology reports. These enlarging PVS were most found in the basal ganglia and temporal lobe, and in patients with previous brain radiation treatment.\u0000\u0000\u0000CONCLUSION\u0000Focal size change of PVS can occur, especially years after brain radiation treatment. Being cognizant of this benign finding is important to consider in the differential diagnosis to avoid undue patient anxiety or unnecessary medical intervention.","PeriodicalId":371045,"journal":{"name":"The Neuroradiology Journal","volume":"52 ","pages":"19714009241242642"},"PeriodicalIF":0.0,"publicationDate":"2024-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140753144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-04-01DOI: 10.1177/197140099801100207
S. Duca, E. Salzedo
Colloid cysts are rare benign intracranial tumors most commonly found in the third ventricle, but also in the subarachnoid spaces and within the brain parenchyma. Many names have been proposed depending on their location, such as neuroependymal cyst, ependymal cyst, glioependymal cyst, choroid plexus cyst and epithelial cyst. From the neuroradiological point of view two forms have been described: a “solid” form with a compact round mass that is iso-hyperdense in CT and slightly hyperintense in T1W and highly hypointense in T2W MR images, and a “cystic-solid” form, characterised by a peripheral fluid collection surrounding a solid central core. This report describes the modifications of a solid form in a cystic-solid cyst, not previously described in the literature, and its evolution after neurosurgical drainage of the fluid collection. Some pathogenetic hypotheses on intracystic fluid production are discussed and displacement of the central solid core inside the cyst is shown.
{"title":"Colloid Cyst","authors":"S. Duca, E. Salzedo","doi":"10.1177/197140099801100207","DOIUrl":"https://doi.org/10.1177/197140099801100207","url":null,"abstract":"Colloid cysts are rare benign intracranial tumors most commonly found in the third ventricle, but also in the subarachnoid spaces and within the brain parenchyma. Many names have been proposed depending on their location, such as neuroependymal cyst, ependymal cyst, glioependymal cyst, choroid plexus cyst and epithelial cyst. From the neuroradiological point of view two forms have been described: a “solid” form with a compact round mass that is iso-hyperdense in CT and slightly hyperintense in T1W and highly hypointense in T2W MR images, and a “cystic-solid” form, characterised by a peripheral fluid collection surrounding a solid central core. This report describes the modifications of a solid form in a cystic-solid cyst, not previously described in the literature, and its evolution after neurosurgical drainage of the fluid collection. Some pathogenetic hypotheses on intracystic fluid production are discussed and displacement of the central solid core inside the cyst is shown.","PeriodicalId":371045,"journal":{"name":"The Neuroradiology Journal","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134363167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-04-01DOI: 10.1177/197140099600900207
F. Roncallo, I. Turtulici, A. Bartolini, I. Ferrea, G. Garrone, I. Gorni, A. Ilariucci, M. Terrile
Scopo del lavoro è quello di razionalizzare l'utilizzo ed ottiminizzare i parametri TC e RM nello studio del distretto testa-collo e di valutare correttamente la complessa geografia della regione. I protocolli iniziali di esame sono stati selezionati sulla base delle informazioni della recente letteratura, adattandoli alle apparecchiature a disposizione. Nella interpretazione delle immagini è stata utilizzata una impostazione anatomo-topografica che si fonda preliminarmente sulla suddivisione del distretto testa-collo in due regioni sopra- e sottoidea e successivamente sulla individuazione di diversi spazi fasciali nell'ambito delle due regioni, sottesi dagli sdoppiamenti dei foglietti della fascia cervicale profonda, che convergono sull'osso ioide. Tali spazi fasciali sono dettagliatamente analizzati da queste metodiche, dal momenta che ben si prestano ad uno studio effettuato secondo piani assiali. Il ricorso alla TC e alla RM è giustificato dai fini rilievi anatomici ottenibili, specie per quanto riguarda l'analisi degli spazi fasciali profondi, occulti all'esame clinico e all'endoscopia. Le informazioni integrate istopatogiche ed anatomo-topografiche consentono una diagnosi precisa di sede, estensione e natura, finalizzate alla pianificazione di un corretto approccio terapeutico.
{"title":"Tomografia computerizzata e risonanza magnetica nella patologia del distretto testa-collo","authors":"F. Roncallo, I. Turtulici, A. Bartolini, I. Ferrea, G. Garrone, I. Gorni, A. Ilariucci, M. Terrile","doi":"10.1177/197140099600900207","DOIUrl":"https://doi.org/10.1177/197140099600900207","url":null,"abstract":"Scopo del lavoro è quello di razionalizzare l'utilizzo ed ottiminizzare i parametri TC e RM nello studio del distretto testa-collo e di valutare correttamente la complessa geografia della regione. I protocolli iniziali di esame sono stati selezionati sulla base delle informazioni della recente letteratura, adattandoli alle apparecchiature a disposizione. Nella interpretazione delle immagini è stata utilizzata una impostazione anatomo-topografica che si fonda preliminarmente sulla suddivisione del distretto testa-collo in due regioni sopra- e sottoidea e successivamente sulla individuazione di diversi spazi fasciali nell'ambito delle due regioni, sottesi dagli sdoppiamenti dei foglietti della fascia cervicale profonda, che convergono sull'osso ioide. Tali spazi fasciali sono dettagliatamente analizzati da queste metodiche, dal momenta che ben si prestano ad uno studio effettuato secondo piani assiali. Il ricorso alla TC e alla RM è giustificato dai fini rilievi anatomici ottenibili, specie per quanto riguarda l'analisi degli spazi fasciali profondi, occulti all'esame clinico e all'endoscopia. Le informazioni integrate istopatogiche ed anatomo-topografiche consentono una diagnosi precisa di sede, estensione e natura, finalizzate alla pianificazione di un corretto approccio terapeutico.","PeriodicalId":371045,"journal":{"name":"The Neuroradiology Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115147521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-04-01DOI: 10.1177/197140099600900210
A. Wackenheim
{"title":"Images clés du Thesaurus de l'Image Médicale de Strasbourg","authors":"A. Wackenheim","doi":"10.1177/197140099600900210","DOIUrl":"https://doi.org/10.1177/197140099600900210","url":null,"abstract":"","PeriodicalId":371045,"journal":{"name":"The Neuroradiology Journal","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114889954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-04-01DOI: 10.1177/197140099600900205
F. Ferrari, G. Giovannini
RIASSUNTOVengono analizzate le principali innovazioni tecnologiche che, a partire dalle classiche sequenze spin-eco, hanno permesso di ridurre i tempi di acquisizione delle immagini in corso di indagini di RM. In particolare sono state considerate le tecniche di acquisizione con angolo di eccitazione inferiore a 90°. Di ciascuna vie ne sottolineata la strategia di implementazione, le difficolta che e stato necessaria superare e le possibili potenzialita positive nell'applicazione clinica.
{"title":"Sequenze Fast e Ultrafast: Un'analisi","authors":"F. Ferrari, G. Giovannini","doi":"10.1177/197140099600900205","DOIUrl":"https://doi.org/10.1177/197140099600900205","url":null,"abstract":"RIASSUNTOVengono analizzate le principali innovazioni tecnologiche che, a partire dalle classiche sequenze spin-eco, hanno permesso di ridurre i tempi di acquisizione delle immagini in corso di indagini di RM. In particolare sono state considerate le tecniche di acquisizione con angolo di eccitazione inferiore a 90°. Di ciascuna vie ne sottolineata la strategia di implementazione, le difficolta che e stato necessaria superare e le possibili potenzialita positive nell'applicazione clinica.","PeriodicalId":371045,"journal":{"name":"The Neuroradiology Journal","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124049648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1990-09-01DOI: 10.1177/19714009900030S209
F. Triulzi
The identification of an intracranial hemorrhage is of great importance in the neuroradiological routine, in particular in the management of patients who have acute neurologic deficits. Both CT and, more recently, MRI allow the direct visualization of blood and its degradation products. The protein component of hemoglobin is the main source of CT hyperdensity, while the paramagnetic iron components of hemoglobin derivates are the responsible of the different MRI aspects.
{"title":"Cerebral Hemorrhage: CT and MRI","authors":"F. Triulzi","doi":"10.1177/19714009900030S209","DOIUrl":"https://doi.org/10.1177/19714009900030S209","url":null,"abstract":"The identification of an intracranial hemorrhage is of great importance in the neuroradiological routine, in particular in the management of patients who have acute neurologic deficits. Both CT and, more recently, MRI allow the direct visualization of blood and its degradation products. The protein component of hemoglobin is the main source of CT hyperdensity, while the paramagnetic iron components of hemoglobin derivates are the responsible of the different MRI aspects.","PeriodicalId":371045,"journal":{"name":"The Neuroradiology Journal","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115512064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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