Choong CT(1), Lee SH. Methods. Benign external hydrocephalus (BEH), hygroma and chronic subdural haematoma are extra‐axial fluid collections in infants. Spinal subdural hygroma has previously been associated with intracranial hypotension or as a complication of spinal procedures. CT/MRI. Hence, MRI of … 1 2 Spontaneous resolution of idiopathic lumbar subdural hygroma has not been reported in the literature, to the best of our knowledge. Author information: (1)Kandang Kerbau Women's and Children's Hospital, Singapore, Singapore. After slight retraction of the subdural drain, however, the residual compartment was markedly reduced. What symptoms a person has with a general hygroma depends on the cause. Of note, the patient had an unwit-nessed fall from her crib 1 month earlier. CT is the preferred diagnostic imaging modality. postoperative subdural hygroma Using the CT scans taken 6–9 weeks after surgery, sub-dural hygromas > 10 ml were identified in 36 patients, the volumes ranging from 11 to 150 ml (mean ± SD: 44.9 ± 33.8 ml). AKA traumatic subdural effusion, AKA hydroma. (D) Resolution of the subdural col-lection (730th day). Most subdural hygromas are believed to be derived from chronic subdural hematomas.They are commonly seen in elderly people after minor trauma but can also be seen in children after an infection. A subdural hygroma is a collection of cerebrospinal fluid (CSF), without blood, located under the dural membrane. 1995 Mar. Subdural hygroma (SDH) is characterized by subdural fluid collection whose CT value is between 10 HU and 16 HU, or less than 20 HU , , . There have been a few such cases described in the literature; … A total of 32 patients with 37 extra- or subdural effusions was studied prospectively by unenhanced and contrast-enhanced cranial CT and MRI. In our patient, low‐density subdural effusions on computerised tomography were misleadingly reported as chronic subdural hematomas. A subdural hygroma radiographically appears as a crescentic near-CSF density/signal accumulation in the subdural space that does not extend into the sulci and rarely exerts significant mass-effect . [Subacute subdural hematoma: findings in CT, MRI and operations and review of onset mechanism]. (A) CT scan showing bilateral frontal subdural hygroma (12 th day). Lumbar puncture is a procedure used commonly for intrathecal chemotherapy for patients with B-cell acute lymphocytic leukemia (B-ALL) though subdural hygroma is a very rare complication. Acute subdural hygroma. There was suggestion of another possible very thin subdural hygroma along left frontal convexity extending into the inter-hemispheric fissure (Fig. I, the copyright holder of this work, hereby publish it under the following licenses: This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Subdural effusions (SEs) contain xanthochromic fluid due to extravasation of plasma from these capillaries [9]. Subdural hygroma was diagnosed by using CT scans in which a crescent shape . It appears to be relatively common, but its onset time and natural history are not well defined. Epidemiology Traumatic subdural hygroma. When a subdural hygroma is seen in infants and children it is often after they have had an infection but it could also be from a minor head injury from falling, hitting their head, or even child abuse. days post traumatic. Subdural hematoma (SDH) and epidural hematoma are characterized by bleeding into the spaces surrounding the brain. Background: Traumatic subdural hygroma (TSHy) is an accumulation of cerebrospinal fluid (CSF) in the subdural space after head injury. Intracranial arachnoid cysts are cerebrospinal fluid-filled collections between arachnoid layers. Axial computed tomography image conducted shortly after a motor vehicle accident (A) demonstrates hyperdense subarachnoid hemorrhage within the right sylvian fissure (white arrow) . Fig. 2.4 ). SDHs vary in density and may extend over a large portion of the surface of the brain. Initially, a hygroma and insufficient expansion of the cerebral hemisphere were detected in the CT scans. Man of 80 years old. Subdural fluid collections (SFCs) may be either a hygroma (i.e. With the availability of serial computed tomographic (CT) scans, it is possible to document non-invasively the appearance of CSF-density subdural fluid where no prior blood accumulation has been present. Subdural haematoma (SDH) age. We present two cases where patients developed subdural hygroma following posterior fossa surgery for brain tumors. Distinguishing between subdural hygroma and chronic subdural hematoma on CT is a matter of controversy. Since the patient was asymptom- Nine cases are reported that fulfilled the criteria for diagnosis of subdural hygroma. Considered a benign epiphenomenon of trauma, the pathogenesis of TSHy is still unclear and many questions remain unanswered. Subdural hygroma is a cerebrospinal fluid accumulation in the subdural space.