====== Bilateral chronic subdural hematoma ======

//[[J.Sales-Llopis]]//

//Neurosurgery Department, [[General University Hospital Alicante]], [[Spain]]//

===== Latest PubMed Bilateral chronic subdural hematoma-related Articles=====

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===== Definition =====

A bilateral [[chronic subdural hematoma]] (bCSDH) is a [[condition]] where there is an [[accumulation]] of [[blood]] in the [[subdural space]] on both [[hemisphere]]s of the [[brain]]. These [[hematoma]]s develop over weeks to months, often due to minor [[head trauma]], and can lead to progressive [[neurological deficit]]s.

===== Epidemiology =====

The overall incidence of Bilateral [[Chronic Subdural Hematoma]] has been reported to vary from 16% to 20%
((O. De Jesus, H. Pacheco, B. Negron
Chronic and subacute subdural hematoma in the adult population. The Puerto Rico experience
P R Health Sci J, 17 (3) 1998))
((G. Penchet, H. Loiseau, J.P. Castel
Chronic bilateral subdural hematomas
Neurochirurgie, 44 (4) (1998), pp. 247-252))
((R.G. Robinson
Chronic subdural hematoma: surgical management in 133 patients
J Neurosurg, 61 (2) (1984), pp. 263-268))
----
Data on bilateral [[chronic subdural hematoma]]s (CSHs) are scant
((Schaller B, Radziwill AJ, Wasner M, Gratzl O, Steck AJ. [Intermittent
paraparesis as manifestation of a bilateral chronic subdural hematoma]. Schweiz
Med Wochenschr. 1999 Jul 27;129(29-30):1067-72. German. PubMed PMID: 10464909.))
, including information on the frequency of symptoms, response to various treatments, and postoperative complications, compared with data on unilateral CSH. Bilateral CSHs constitute a fair portion of CSHs, especially in patients older than 75 years and in those with [[coagulopathy]].

===== Classification =====

see also [[Chronic subdural hematoma classification]]


==== Bilateral hypodense chronic subdural hematoma ====

[[Bilateral hypodense chronic subdural hematoma]].

==== Bilateral isodense chronic subdural hematoma ====

[[Bilateral isodense chronic subdural hematoma]].


===== Clinical features =====

[[Bilateral chronic subdural hematoma clinical features]].

===== Diagnosis =====

[[Bilateral chronic subdural hematoma diagnosis]].

===== Differential diagnosis =====
If the lesion is placed more anteriorly and medially, hyperdense in intensity and enclosed in thick capsule, it may look biconvex in shape and can mimic extradural hematoma. This location of the lesion will also displace the frontal horns of the lateral ventricles laterally than medially, as in the present case. To avoid this confusion, if available, magnetic resonance imaging (MRI) would be better than CT in identifying these lesions
((Fujisawa H, Nomura S, Kajiwara K, Kato S, Fujii M, Suzuki M. Various magnetic resonance imaging patterns of chronic subdural hematomas: indicators of the pathogenesis? Neurol Med Chir (Tokyo) 2006;46:333–9.))
((Kelly AB, Zimmerman RD, Snow RB, Gandy SE, Heier LA, Deck MD. Head trauma: Comparison of MR and CT experience in 100 patients. AJNR Am J Neuroradiol. 1988;9:699–708.))
((Guenot M. Chronic subdural haematoma: diagnostic imaging studies. Neurochirurgie. 2001;47:473–8.))
((Hosoda K, Tamaki N, Masumura M, Matsumoto S, Maeda F. Magnetic resonance images of chronic subdural hematomas. J Neurosurg. 1987;67:677–83.))
((Agrawal A. Bilateral biconvex frontal chronic subdural hematoma mimicking
extradural hematoma. J Surg Tech Case Rep. 2010 Jul;2(2):90-1. doi:
10.4103/2006-8808.73625. PubMed PMID: 22091345; PubMed Central PMCID: PMC3214288.)).

===== Treatment =====

see [[Bilateral chronic subdural hematoma treatment]].
 
===== Outcome =====
Mixed high and low intensity in T2WI or low intensity in T1WI is the most predictable factor to show rapid aggravation
((Kurokawa Y, Ishizaki E, Inaba K. Bilateral chronic subdural hematoma cases showing rapid and progressive aggravation. Surg Neurol. 2005 Nov;64(5):444-9; discussion 449. PubMed PMID: 16253697.)).

Clinicians must be aware of the higher recurrent rate of bilateral CSDH after burr hole craniostomy 
((Huang YH, Yang KY, Lee TC, Liao CC. Bilateral chronic subdural hematoma: what is the clinical significance? Int J Surg. 2013;11(7):544-8. doi: 10.1016/j.ijsu.2013.05.007. Epub 2013 May 24. PubMed PMID: 23707986.)).


===== Case series =====

[[Bilateral chronic subdural hematoma case series]]

===== Case reports =====

[[Bilateral chronic subdural hematoma case reports]]

===== Bilateral chronic subdural hematoma General University Hospital of Alicante Cases =====

[[Bilateral chronic subdural hematoma General University Hospital of Alicante Cases]]