It can cross the suture lines, but not across dural reflections such as falx cerebri or tentorium cerebelli. Therefore, subdural hematoma always limited to one side of the brain. Density of SDH reduces as it progresses from acute to chronic forms. However, areas with low density may not represent chronic SDH entirely as unclotted blood products that are due to active bleed can also give low density appearance on CT scans especially those with coagulopathy. Those with SDH that have same density with brain parenchyma may represent acute bleed such as those with anemia, arachnoid tear, and the mixing of hemorrhage and CSF. SDH usually have high or mixed densities during first two days of trauma, followed by isodensity at 11 days after trauma, and hypodensity after 14 days of trauma. Membranes with granulation tissue can rupture within SDH, and give high density appearance on CT scan. Over a prolonged period of time, calcifications can form. SDH can be treated with burr hole drainage, craniotomy or port system placement for blood clot evacuation, or middle meningeal artery embolisation.Subdural hematoma maybe less acute than epidural hematoma due to slower blood accumulation, but it still has the potential to cause brain herniation that may require surgical evacuation. Clinical features depend on the site of injury and severity of injury. Patients may have a history of loss of consciousness but they recover and do not relapse. Clinical onset occurs over hours.
But with assistive devices, independence can be maintained. People affected by Becker muscular dystrophy can still maintain active lifestyles. History
Becker muscular dystrophy is named after the German doctor Peter Emil Becker who published an article about it in 1955. References
This article incorporates public domain material from websites or documents of the Centers for Disease Control and Prevention. Further reading
"Becker Muscular Dystrophy (for Parents)." Edited by Mena T. Scavina, KidsHealth, The Nemours Foundation, Mar. 2018, kidshealth.org/en/parents/becker-md.html. Gaudio, Daniela del; Yang, Yaping; Boggs, Barbara A.; Schmitt, Eric S.; Lee, Jennifer A.; Sahoo, Trilochan; Pham, Hoang T.; Wiszniewska, Joanna; Craig Chinault, A.; Beaudet, Arthur L.; Eng, Christine M. (September 2008). "Molecular diagnosis of Duchenne/Becker muscular dystrophy: enhanced detection of dystrophin gene rearrangements by oligonucleotide array-comparative genomic hybridization". Human Mutation. 29 (9): 1100–1107. doi:10.1002/humu.20841. PMID 18752307. S2CID 21437006. Li, Xihua; Zhao, Lei; Zhou, Shuizhen; Hu, Chaoping; Shi, Yiyun; Shi, Wei; Li, Hui; Liu, Fang; Wu, Bingbing; Wang, Yi (2015). "A comprehensive database of Duchenne and Becker muscular dystrophy patients (0–18 years old) in East China". Orphanet Journal of Rare Diseases. 10 (1): 5. doi:10.1186/s13023-014-0220-7. PMC 4323212. PMID 25612904. External links
Becker muscular dystrophy at Curlie