Document Detail

Blake's pouch cyst: an entity within the Dandy-Walker continuum.
MedLine Citation:
PMID:  10872175     Owner:  NLM     Status:  MEDLINE    
Abnormal cerebrospinal fluid (CSF) collections within the posterior fossa are defined by the Dandy-Walker complex (DWC) and by arachnoid cysts (AC). The DWC includes the Dandy-Walker malformation (DWM), the Dandy-Walker variant (DWV) and the mega-cisterna magna (MCM). In addition, Tortori-Donati et al. added persistent Blake's pouch cyst (BPC) as an independent entity within the DWC. BPC represents a posterior ballooning of the superior medullary velum into the cisterna magna. All of these malformations are overlapping developmental anomalies characterized by varying degrees of malformation of the medullary vela, the cerebellar vermis and hemispheres, the fourth ventricle choroid plexus, the posterior fossa subarachnoid cisterns and the enveloping meningeal structures. We present two cases of persistent BPC detected in two adult women without history of gestational or subsequent growth problems. They underwent neuroradiological investigation because of headache and because of recurrent episodes of loss of consciousness, respectively. The MRI findings included tetraventricular hydrocephalus, wide communication of the fourth ventricle and the cystic posterior fossa (i.e. BPC), inferior posterior fossa mass effect with or without hypoplasia of both the cerebellar vermis and the medial aspects of the cerebellar hemispheres, and absence of communication between fourth ventricle and the basal subarachnoid space in the midline posteriorly. Persistent BPC is defined by a failure of embryonic assimilation of the area membranacea anterior within the tela choroidea associated with imperforation of the foramen of Magendie. Typically this condition becomes symptomatic early in life. In the current cases the normal function of the laterally positioned foramina of Luschka probably helped to maintain some CSF flow between intraventricular and subarachnoid spaces, with the establishment of a precarious equilibrium characterized by a compensatory enlargement of the cerebral ventricular system (i.e. hydrocephalus).
F Calabrò; T Arcuri; J R Jinkins
Related Documents :
22567525 - Successful conservative treatment of a cesarean scar pregnancy with systemically admini...
22433335 - Uterine rupture with attempted vaginal birth after cesarean delivery: decision-to-deliv...
111215 - Organochlorine residues in harp seal (phagophilus groenlandicus) tissues, gulf of st. l...
9459565 - Source of extracellular brain adenosine during hypoxia in fetal sheep.
20437535 - Movement disorders and pregnancy: a review of the literature.
21389085 - Management of hyperthyroidism during pregnancy and lactation.
Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Neuroradiology     Volume:  42     ISSN:  0028-3940     ISO Abbreviation:  Neuroradiology     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2000-10-19     Completed Date:  2000-10-19     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  1302751     Medline TA:  Neuroradiology     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  290-5     Citation Subset:  IM    
Neuroradiology Section T.M.A. Clinica Villa Salus, Genoa, Italy.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Cerebral Ventricles / pathology
Cranial Fossa, Posterior / pathology*
Cysts / diagnosis*
Dandy-Walker Syndrome / diagnosis*
Diagnosis, Differential
Magnetic Resonance Imaging
Middle Aged

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Primary malignant lymphoma of the maxillary sinus: CT and MRI.
Next Document:  Treatment of restenosis after percutaneous transluminal angioplasty for internal carotid artery sten...