Imaging features of central nervous system haemangiopericytomas

2006 ◽  
Vol 17 (7) ◽  
pp. 1685-1693 ◽  
Author(s):  
NA Sibtain ◽  
S. Butt ◽  
SEJ Connor
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Imaging Features

scholarly journals MRI imaging features of HIV-related central nervous system diseases: diagnosis by pattern recognition in daily practice

2021 ◽  
Author(s):  
Mio Sakai ◽  
Masahiro Higashi ◽  
Takuya Fujiwara ◽  
Tomoko Uehira ◽  
Takuma Shirasaka ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Pattern Recognition ◽  
Nervous System ◽  
Immune Reconstitution Inflammatory Syndrome ◽  
Immune Reconstitution ◽  
Opportunistic Infections ◽  
Primary Cns Lymphoma ◽  
Imaging Features ◽  
Cns Diseases ◽  
Inflammatory Syndrome

AbstractWith the advent of antiretroviral therapy (ART), the prognosis of people infected with human immunodeficiency virus (HIV) has improved, and the frequency of HIV-related central nervous system (CNS) diseases has decreased. Nevertheless, mortality from HIV-related CNS diseases, including those associated with ART (e.g., immune reconstitution inflammatory syndrome) remains significant. Magnetic resonance imaging (MRI) can improve the outlook for people with HIV through early diagnosis and prompt treatment. For example, HIV encephalopathy shows a diffuse bilateral pattern, whereas progressive multifocal leukoencephalopathy, HIV-related primary CNS lymphoma, and CNS toxoplasmosis show focal patterns on MRI. Among the other diseases caused by opportunistic infections, CNS cryptococcosis and CNS tuberculosis have extremely poor prognoses unless diagnosed early. Immune reconstitution inflammatory syndrome shows distinct MRI findings from the offending opportunistic infections. Although distinguishing between HIV-related CNS diseases based on imaging alone is difficult, in this review, we discuss how pattern recognition approaches can contribute to their early differentiation.

Imaging and clinical features of neurocutaneous melanosis in the pediatric population.

2021 ◽  
Vol 17 ◽  
Author(s):  
Mormina Enricomaria ◽  
Granata Francesca ◽  
Vinci Sergio Lucio ◽  
Coglitore Alessandra ◽  
Caragliano Antonio Armando ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Clinical Features ◽  
Pediatric Population ◽  
Cord Compression ◽  
Imaging Method ◽  
Imaging Features ◽  
Multisystem Disease ◽  
Neurocutaneous Melanosis ◽  
Pubmed Database

Background: Neurocutaneous melanosis (NCM) is a rare nonfamilial phakomatosis characterized by the presence of congenital melanocytic nevi and abnormal melanocytes infiltration of the leptomeninges. Objective & Methods: This paper shows the importance of early diagnosis and the most important imaging features of the disease on CT and MR scans. PubMed database was searched from January 1972 to September 2020. Papers including imaging findings of NCM, clinical, follow-up, and treatment features were collected, selecting only 89 studies. Discussion: NCM is a term used for the first time by van Bogaert in 1948. It refers to a condition caused by an error during morphogenesis and migration leading to leptomeningeal melanocytic accumulation. Although histological findings are the gold standard for diagnosis confirmation, neuroimaging and clinical features strongly support the suspect of NCM. Localization and extension of the lesions are predictive of neurological manifestations related to increased intracranial pressure, mass lesions, or spinal cord compression. CT demonstrates sites of increased density in the anterior temporal lobe - mainly the amygdala - thalami, cerebellum, and frontal lobes base. However, MRI is the best imaging method to diagnose central nervous system lesions, often appearing as T1-short signal areas of the cerebral parenchyma, indicative of central nervous system melanosis. MRI can also reveal associated intracranial and intraspinal abnormalities. Conclusion: Early imaging, when available, is helpful if NCM suspect is raised and may be of guidance in comparing later studies. NCM requires a multidisciplinary approach since it is a multisystem disease with a genetic component.

scholarly journals Extensive systemic metastases from primary central nervous system haemangiopericytoma

2020 ◽  
Vol 6 (2) ◽  
pp. 20190081
Author(s):  
Chi Long Ho ◽  
Jeremy JH Lam ◽  
Robert Chun Chen
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Fatal Outcome ◽  
Imaging Features ◽  
Tumour Control ◽  
Local Tumour Control ◽  
Meningeal Tumour ◽  
Local Tumour ◽  
The Central Nervous System ◽  
Extracranial Metastases

Primary intracranial tumours rarely metastasise outside of the central nervous system (CNS). This report describes a rare case of recurrent meningeal haemangiopericytoma with extensive systemic metastases, which eventually resulted in a fatal outcome. We discuss some prevailing theories as to the rarity of extracranial metastases from primary CNS haemangiopericytoma, and elucidate the epidemiology, imaging features, differential diagnosis, treatment, and prognosis of this unusual but surprisingly aggressive meningeal tumour. Besides aggressive treatment for local tumour control, patients with primary CNS haemangiopericytoma require long-term post-treatment surveillance to detect systemic metastases.

Imaging features of multifocal primary rhabdoid tumour of the central nervous system with meningeal and spinal metastases

2003 ◽  
Vol 33 (4) ◽  
pp. 275-277 ◽  
Author(s):  
Peter De Mot ◽  
Philippe Demaerel ◽  
Guy Wilms ◽  
Stefaan Van Gool ◽  
Raf Sciot
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Spinal Metastases ◽  
Imaging Features ◽  
Rhabdoid Tumour ◽  
The Central Nervous System

Imaging of primary central nervous system lymphoma

2006 ◽  
Vol 21 (5) ◽  
pp. 1-6 ◽  
Author(s):  
John L. Go ◽  
Sandy C. Lee ◽  
Paul E. Kim
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Central Nervous System Lymphoma ◽  
Demographic Characteristics ◽  
Steady Increase ◽  
Imaging Features ◽  
Immunocompromised Patients ◽  
The Past ◽  
Neoplastic Process ◽  
Salient Features

✓Primary central nervous system lymphoma (PCNSL) is an aggressive neoplastic process that occurs in both immuno-competent and immunocompromised patients. Over the past 30 years there has been a steady increase in the number of cases in both patient populations. The imaging features for the disease and demographic characteristics within these patient populations vary, and in this article the authors describe the salient features of these two groups.

scholarly journals Cerebral Blastomycosis: Radiologic-Pathologic Correlation of Solitary CNS Blastomycosis Mass-Like Infection

2015 ◽  
Vol 5 ◽  
pp. 30 ◽  
Author(s):  
Costas Stavrakis ◽  
Ananth Narayan ◽  
Olga Voronel
Keyword(s):  
Central Nervous System ◽  
Immune Response ◽  
Nervous System ◽  
Rare Complication ◽  
Blastomyces Dermatitidis ◽  
Imaging Features ◽  
Imaging Findings ◽  
Cns Involvement ◽  
Diffusion Restriction ◽  
Canadian Provinces

Blastomycosis is a fungal infection rarely seen in clinical practice. Endemic to the Midwestern United States as well as the Canadian provinces of Manitoba and Ontario, Blastomyces dermatitidis characteristically involves the skin and lungs. Central nervous system (CNS) involvement, although a rare complication of this disease, can be fatal. The current literature on CNS blastomycosis primarily centers on the spectrum of traditional imaging features of T1- and T2-weighted imaging with which this entity can present. However, here we present the direct histopathologic correlation of the imaging findings of solitary mass like CNS blastomycosis, with an emphasis on the association of diffusion restriction within the lesion with a granulomatous immune response.

scholarly journals Primary Central Nervous System Lymphoma of the Cerebellopontine Angle: Epidemiological Characteristics and Imaging Features May Be Helpful for Making an Accurate Preoperative Diagnosis

2021 ◽  
Author(s):  
Jian Zheng ◽  
Buyi Zhang ◽  
Zhaoxu Huang ◽  
Hui Ling ◽  
Zhangqi Dou ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Preoperative Diagnosis ◽  
Cerebellopontine Angle ◽  
English Literature ◽  
Central Nervous System Lymphoma ◽  
Imaging Features ◽  
Weighted Image ◽  
R Ratio ◽  
Epidemiological Characteristics

Abstract Purpose Primary central nervous system lymphoma (PCNSL) of the cerebellopontine angle (CPA) is rare, thus the preoperative diagnosis is still a challenge.MethodsWe searched the database at our institution and performed a search of English literature in PubMed and Google Scholar. Keywords used were as follows: “primary central nervous system lymphoma”; “cerebellopontine angle”; “lymphoma”. Only cases in the English language that were located in the CPA and contained adequate clinical information pertinent to the analysis were included.Results297 cases of pathologically confirmed PCNSLs were recorded between January 2009 and October 2020 at our institution. 6 cases were located in the CPA, accounting for 2.0% of all PCNSLs. 26 cases meeting the above criteria were found in the literature. Including ours, a total of 32 patients were analyzed. Females were more frequently affected (F/M ratio, 2.2:1). There was a preponderance of left-sided lesions in the PCNSLs of the CPA (L/R ratio, 1.5:1). On CT, 80.0% of them presented as hyperdense lesions. On T1-weighted image, 66.7% appeared isointense. While on T2-weighted image (T2WI), 68.4% appeared isointense/hypointense. After contrast administration, 86.2% presented intense homogeneous enhancement.ConclusionPCNSL of the CPA is extremely rare, accounting for 2.0% of all PCNSLs in our study. There is a preponderance of females and left-sided lesions in this disease. Contrast-enhanced magnetic resonance imaging with T2WI is very helpful in the preoperative diagnosis of the CPA PCNSL. Although rare, lymphoma should be included in the differential diagnosis of CPA lesions.

Imaging of CNS Fungal Infections: Review Article

2021 ◽  
Vol 104 (5) ◽  
pp. 872-885
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Central Nervous System ◽  
Nervous System ◽  
Magnetic Resonance ◽  
Fungal Infections ◽  
Imaging Features ◽  
Imaging Findings ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri

Fungal infections of the central nervous system (CNS) are usually identified in immunocompromised patients but rare in immunocompetent hosts. The clinical and imaging manifestations are mainly influenced by types of fungal pathogen and immune status of the patients. The CNS fungal infections can develop through hematogenous dissemination from primary site of infection, cerebrospinal fluid seeding, or direct extension from adjacent sources of infection. Fungal infections can result in meningitis, meningoencephalitis, cerebritis, granuloma, or abscess formation, which imaging findings are often non-specific and difficult to distinguish from bacterial or tuberculous infection, non-infectious inflammatory disease, or even intracranial neoplasm. Vascular complications including vasculitis, cerebral infarction, or mycotic aneurysm are commonly present due to angioinvasion of fungal hyphae. In addition, some characteristic imaging features of fungal infections can be identified by computed tomography (CT) or magnetic resonance imaging (MRI), such as intracavitary projections in fungal abscesses and gelatinous pseudocysts in cryptococcosis that could help suggest the diagnosis. Recognizing the imaging findings of common intracranial fungal infections combined with appropriate clinical setting is crucial for allowing early diagnosis and leading to early specific treatment. The present article reviewed common imaging findings of CNS fungal infections and distinct imaging features of specific pathogens. Keywords: Fungal infection, Brain abscess, Cryptococcosis, Central nervous system (CNS), Computed tomography (CT), Diffusion weighted imaging (DWI), Magnetic resonance imaging (MRI)

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