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Leptomeningeal Cyst

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1. Leptomeningeal Cyst

Leptomeningeal Cyst Leptomeningeal Cyst Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Leptomeningeal Cyst Leptomeningeal Cyst Aka (...) : Leptomeningeal Cyst From Related Chapters II. Cause III. Pathophysiology ' ' occurs if results in dural tear and brain te through site Appears as "growing " on IV. Associated conditions History of development as newborn V. Management Neurosurgery Images: Related links to external sites (from Bing) These images are a random sampling from a Bing search on the term "Leptomeningeal Cyst." Click on the image (or right click) to open the source website in a new browser window. Related Studies (from Trip Database

2018 FP Notebook

2. Parenchymal Infiltration in Primary Diffuse Leptomeningeal Gliomatosis: Dynamic Changes in Brain MRI (PubMed)

Parenchymal Infiltration in Primary Diffuse Leptomeningeal Gliomatosis: Dynamic Changes in Brain MRI Primary diffuse leptomeningeal gliomatosis (PDLG) is a rare and fatal disease with no special clinical manifestations. Here, we report the dynamic brain magnetic resonance imaging (MRI) changes in a 30-year-old female PDLG patient over a 10-month period. MRI showed aggressive dilation of the subarachnoid space and the ventricular system, numerous encapsulated cysts in the subarachnoid space (...) and the dilated cerebral sulci, diffuse reticulated or focal nodular enhancement in the subarachnoid space, as well as overall enhancement in the cystic walls. In addition to the aforementioned PDLG pathological findings, MRI also revealed non-contrasted solid lesions and a contrasted cyst-like lesion in the paraventricular areas. The dynamic and multiform neuroradiological changes help us to understand the pathological process of PDLG. Of particular interest is the discovery that parenchymal infiltration can

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2017 Frontiers in oncology

3. Leptomeningeal Cyst

Leptomeningeal Cyst Leptomeningeal Cyst Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Leptomeningeal Cyst Leptomeningeal Cyst Aka (...) : Leptomeningeal Cyst From Related Chapters II. Cause III. Pathophysiology ' ' occurs if results in dural tear and brain te through site Appears as "growing " on IV. Associated conditions History of development as newborn V. Management Neurosurgery Images: Related links to external sites (from Bing) These images are a random sampling from a Bing search on the term "Leptomeningeal Cyst." Click on the image (or right click) to open the source website in a new browser window. Related Studies (from Trip Database

2015 FP Notebook

4. Leptomeningeal cysts diagnosed by isotope cisternography (PubMed)

Leptomeningeal cysts diagnosed by isotope cisternography The diagnosis of leptomeningeal cysts by isotope cisternography is described in four cases. The cysts are visualized as abnormal local collections of the radiopharmaceutical, best demonstrated 48 hours after lumbar injection. The investigation makes it possible to diagnose the cyst at an early stage, before severe clinical symptoms and changes in the bones of the skull develop. Cases of leptomeningeal cysts in various areas of the brain

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1973 Journal of neurology, neurosurgery, and psychiatry

5. Role of MRI in Diagnosis of Ruptured Intracranial Dermoid Cyst (PubMed)

is noted (likely secondary to over-draining shunt catheter).Intracranial dermoid cysts are benign rare slow-growing tumors that upon rupture, however, widespread presence of T1 hyperintense droplets and leptomeningeal enhancement can be noted-making MRI the best imaging modality for diagnosis of this rare entity. (...) Role of MRI in Diagnosis of Ruptured Intracranial Dermoid Cyst Intracranial dermoid cystic tumors account for <1% of all intracranial masses.A 52-year-old male, having headaches, nausea and is presented with a history of 2 episodes of new onset seizures. On presentation, the patient had a normal physical exam, including a complete neurological and cranial nerve exam.Precontrast MRI; TSE/T2Wsequence in axial/coronal planes; 3D - HI-resolution T1W sagittal; FLAIR/T2W axial; FLAIR/T2W, Flash/T2W

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2017 Acta Informatica Medica

6. Arachnoid Cyst

anomalies. A small number of arachnoid cysts are acquired, such as those occurring in association with neoplasms or those resulting from adhesions occurring in association with leptomeningitis, hemorrhage, or surgery. They constitute approximately 1% of intracranial masses; 50-60% occur in the middle cranial fossa. Cysts in the middle cranial fossa are found more frequently in males than in females; they occur predominantly on the left side. Most arise as developmental anomalies. A small number (...) Arachnoid Cyst Arachnoid Cyst Imaging: Overview, Radiography, Computed Tomography Edition: No Results No Results Please confirm that you would like to log out of Medscape. If you log out, you will be required to enter your username and password the next time you visit. https://profreg.medscape.com/px/getpracticeprofile.do?method=getProfessionalProfile&urlCache=aHR0cHM6Ly9lbWVkaWNpbmUubWVkc2NhcGUuY29tL2FydGljbGUvMzM2NDg5LW92ZXJ2aWV3 processing > Arachnoid Cyst Imaging Updated: Jan 05, 2016

2014 eMedicine Radiology

7. Primary intracranial sarcomatoid carcinoma arising from a recurrent/residual epidermoid cyst of the cerebellopontine angle: a case report. (PubMed)

Primary intracranial sarcomatoid carcinoma arising from a recurrent/residual epidermoid cyst of the cerebellopontine angle: a case report. Primary intracranial squamous cell carcinomas (SCCs) are rare and mostly associated with an intracranial epidermoid or dermoid cyst. Sarcomatoid carcinoma is a rare biphasic tumor composed of both carcinomatous and sarcomatous components and has not previously been reported as a primary intracranial tumor. Here, we present a case of a 60-year-old man (...) with a primary intracranial sarcomatoid carcinoma, arising from the remnants of the previously resected epidermoid cyst in the cerebellopontine angle. The resected material had portions of an epidermoid cyst lined by normal and dysplastic squamous epithelia and invasive keratinizing SCC. This area was in continuity with areas of highly pleomorphic, anaplastic sarcomatoid cells. Brisk mitotic activity and extensive areas of necrosis were found. On immunohistochemical staining, the cells of the conventional

2011 American Journal of Surgical Pathology

8. Leptomeningeal Cyst of the Orbital Roof in an Adult: Case Report and Literature Review (PubMed)

Leptomeningeal Cyst of the Orbital Roof in an Adult: Case Report and Literature Review To present the case of a leptomeningeal cyst involving the orbital roof in an adult.Case report and literature review.Tertiary referral center.A 47-year-old female with a remote history of a skull fracture at 3 years of age presented with increasing headaches and retro-orbital pain. A computed tomogram and magnetic resonance image revealed a leptomeningeal cyst of the orbital roof.Only one previous (...) leptomeningeal cyst of the orbital roof has been reported in an adult. Surgical excision of the lesion was performed and follow-up imaging 18 months after the operation revealed no evidence of recurrence.Although extremely rare, adult patients can develop growing skull fractures or leptomeningeal cysts of the orbital roof. Such lesions should be included in the differential diagnosis when a patient presents with orbital pain or exophthalmos and a history of head trauma as a child.

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2009 Skull Base

9. ACR–ASNR–SCBT-MR Practice Parameter for the Performance of Magnetic Resonance Imaging (MRI) of the Adult Spine

a. Intramedullary masses b. Intradural extramedullary masses c. Intradural leptomeningeal disease d. Bone tumors e. Extradural soft-tissue neoplasms f. Treatment fields for radiation therapy g. Soft-tissue masses h. Tumors of nerves i. Tumors of muscle and connective tissues 8. Miscellaneous a. Syringohydromyelia (multiple etiologies, including Chiari malformations, trauma, etc) a. Postoperative fluid collections and soft-tissue changes (extradural and intradural) b. Epidural and subdural fluid collections c (...) to be aware of the imaging findings of this condition [14-17]. MRI helps demonstrate the location of the cord herniation through the dural defect, to assess the degree of herniation and determine if there are any cord signal changes, all of which impact patient management and prognosis [14-17]. The MRI appearance may not be pathognomonic for a spinal cord herniation as it may be difficult to distinguish from an arachnoid web or arachnoid cyst. D. Degenerative Disc Disease MRI provides a precise

2019 American Society of Neuroradiology

10. ACR–ASNR–SPR Practice Parameter for the Performance and Interpretation of Magnetic Resonance Imaging (MRI) of the Brain

double-blind placebo-controlled study of gadopentetate dimeglumine as an MR contrast agent: evaluation in patients with cerebral lesions. AJR 1989;152:813-823. 113. Fukuoka H, Hirai T, Okuda T, et al. Comparison of the added value of contrast-enhanced 3D fluid- attenuated inversion recovery and magnetization-prepared rapid acquisition of gradient echo sequences in relation to conventional postcontrast T1-weighted images for the evaluation of leptomeningeal diseases at 3T. AJNR 2010;31:868-873. 114

2019 American Society of Neuroradiology

12. CRACKCast E038 – Pediatric Trauma

Cephalohematoma : blood UNDER periosteum = does NOT cross suture lines scalp bleeding can be profuse and lead to shock in infants Cerebral contusions clearly demonstrable on CT scan as a brain parenchymal injury neuro features with altered MS 10) What is the difference between a linear and a diastatic skull fracture Skull fracture factors associated with poor outcomes: 1) fracture over a vascular channel 2) a depressed fracture 3) a diastatic fracture cross through/along suture lines and leptomeningeal cysts

2016 CandiEM

13. Childhood Central Nervous System Embryonal Tumors Treatment (PDQ®): Health Professional Version

the extent of residual disease. In addition, lumbar CSF analysis is performed, if deemed safe. Neuroimaging and CSF evaluation are considered complementary because as many as 10% of patients will have evidence of free-floating tumor cells in the CSF without clear evidence of leptomeningeal disease on MRI scan.[ ] CSF analysis is conventionally done 10 to 21 days after surgery. If CSF is obtained within 10 days of the operation, detection of tumor cells within the spinal fluid is possibly related (...) dysgenesis. Arch Pathol Lab Med 109 (4): 367-9, 1985. [ ] Offit K, Levran O, Mullaney B, et al.: Shared genetic susceptibility to breast cancer, brain tumors, and Fanconi anemia. J Natl Cancer Inst 95 (20): 1548-51, 2003. [ ] Kivelä T: Trilateral retinoblastoma: a meta-analysis of hereditary retinoblastoma associated with primary ectopic intracranial retinoblastoma. J Clin Oncol 17 (6): 1829-37, 1999. [ ] Abramson DH, Dunkel IJ, Marr BP, et al.: Incidence of pineal gland cyst and pineoblastoma

2018 PDQ - NCI's Comprehensive Cancer Database

14. Retinoblastoma Treatment (PDQ®): Health Professional Version

of the risk related to ionizing radiation exposure. A cystic pineal gland, which is commonly detected by surveillance MRI, needs to be distinguished from a cystic variant of pineoblastoma. In children without retinoblastoma, the incidence of pineal cysts has been reported to be 55.8%.[ ] In a case-control study that included 77 children with retinoblastoma and 77 controls, the incidence of pineal cysts was similar (61% and 69%, respectively), and the size and volume of the pineal gland (...) involvement) —Single lesion —Multiple lesions b. CNS extension (with or without any other site of regional or metastatic disease) —Prechiasmatic lesion —CNS mass —Leptomeningeal and CSF disease CNS = central nervous system; CSF = cerebrospinal fluid. Grouping Systems Grouping systems are relevant for assessment of intraocular disease extension and are helpful predictors of ocular salvage. Reese-Ellsworth Classification for Intraocular Tumors Reese and Ellsworth developed a classification system

2018 PDQ - NCI's Comprehensive Cancer Database

15. Cauda equina mass: An Approach

vertebral involvement and poorly defined margins . Cysts are also common in astrocytomas without a cap sign. Meningioma – well defined isointense lesions on T1 & T2 with variable homogenous enhancement & may show calcifications. Hemorrhages are uncommon. Metastasis of the intradural spine are rare & usually seen from lung, breast, melanoma, lymphoma, leukemia. P ost-contrast study can show leptomeningeal enhancement & thickening suggesting drop metastasis or leptomeningeal carcinomatosis also known (...) sign) & calcifications. Cord edema & nontumoral cysts are common findings. Also may show scoliosis, canal widening & vertebral scalloping. Schwannomas - arise from nerve roots of cauda equine & show marked enhancement with occasional cystic & necrotic areas & fatty degeneration at times. Hemorrhages are less common. Other less frequent tumors - Astrocytoma can show bone erosion, scoliosis, interpedicular distance widening and eccentric disposition. T1-weighted MRI reveals a lesion with multiple

2019 Sumer's Radiology Blog

16. Childhood Central Nervous System Germ Cell Tumors Treatment (PDQ®): Health Professional Version

or progression; many recurrences were local, local plus ventricular, and ventricular alone and/or with leptomeningeal dissemination throughout the CNS, which required additional therapy, including radiation.[ ] Subsequent studies have continued to support the need for radiation therapy after chemotherapy and the likely requirement for whole-ventricular irradiation (24 Gy) with local tumor site–boost (total dose, 40 Gy).[ ][ ]; [ ][ ] Excellent results have also been reported for patients with metastatic (...) A, Okano A, et al.: The pathogenesis of intracranial growing teratoma syndrome: proliferation of tumor cells or formation of multiple expanding cysts? Two case reports and review of the literature. Childs Nerv Syst 30 (8): 1455-61, 2014. [ ] Treatment of Recurrent Childhood CNS Germ Cell Tumors The most common type of relapse for childhood central nervous system (CNS) germ cell tumors (GCTs) is local recurrence at the primary tumor site; however, 30% of relapses are outside the primary site

2017 PDQ - NCI's Comprehensive Cancer Database

17. Head Trauma ? Child

, such as cerebrospinal fluid leak, leptomeningeal cyst, or meningitis, may also occur. In an effort to avoid unnecessary radiation exposure and health care costs, it is important to determine which patients would benefit from repeated imaging in the subacute setting. Patients with a significant change in ACR Appropriateness Criteria ® 9 Head Trauma — Child neurologic status should be reimaged. However, the absence of neurologic changes does not preclude the possibility of secondary or progressive injury

2014 American College of Radiology

18. MTX110 by Convection-Enhanced Delivery in Treating Participants With Newly-Diagnosed Diffuse Intrinsic Pontine Glioma

Criteria: Patients who had clinical and/or radiographic (MRI) progression of tumor following external beam radiation therapy. Patients with metastatic disease, including leptomeningeal or subarachnoid disseminated disease. Patients with tumor morphology that predicts poor coverage of the majority of the tumor including bilateral thalamic involvement, or cysts that represent > 50% of cross-sectional areas of the pons. These subjects should be discussed with the study chairs. Patients who are receiving

2018 Clinical Trials

19. Langerhans Cell Histiocytosis Treatment (PDQ®): Health Professional Version

characteristic picture on high-resolution CT scan.[ ] Confluence of cysts may lead to bullous formation, and spontaneous pneumothorax can be the first sign of LCH in the lung, although patients may present with tachypnea or dyspnea. Ultimately, widespread fibrosis and destruction of lung tissue may lead to severe pulmonary insufficiency. Declining diffusion capacity may also herald the onset of pulmonary hypertension.[ ] Widespread fibrosis and declining diffusion capacity are much less common in children (...) . In young children with diffuse disease, therapy can halt the progress of the tissue destruction, and normal repair mechanisms may restore some function, although scarring or even residual nonactive cysts may continue to be visible on radiologic studies. Pulmonary involvement is present in approximately 25% of children with multisystem low-risk and high-risk LCH.[ ] However, a multivariate analysis of pulmonary disease in multisystem LCH did not show pulmonary disease to be an independent prognostic

2016 PDQ - NCI's Comprehensive Cancer Database

20. Pituitary Tumors Treatment (PDQ®): Health Professional Version

of the adrenal gland and anterior pituitary). Isolated familial acromegaly. A number of other lesions should be considered in the differential diagnosis of sellar masses. Although rare, lymphocytic (i.e., autoimmune) hypophysitis should be considered in the differential diagnosis of any nonsecreting pituitary mass, especially when occurring during pregnancy or postpartum.[ ] In addition, the clinician should consider craniopharyngioma and Rathke cleft cyst in the differential diagnosis of pituitary tumors (...) the optimal view;[ ] however, CT scans appear to be less sensitive than MRI scans in this application.[ ] For each imaging technique, a focal hypointensity within the pituitary gland is considered abnormal and suggestive of an adenoma. An MRI scan is also the best diagnostic imaging choice for pituitary carcinomas; metastases may be found in the cerebral lobes, cerebellum, spinal cord, leptomeninges, and subarachnoid space.[ ] This radioanatomical classification places adenomas into 1 of 4 grades (I–IV

2016 PDQ - NCI's Comprehensive Cancer Database

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