This is the American ICD-10-CM version of G46.3 - other international versions of ICD-10 G46.3 may differ. The 2023 edition of ICD-10-CM G46.3 became effective on October 1, 2022. Conclusion: The knowledge of normal diameters and variations in PICA supplying the brain can be a useful guideto the surgeons and interventional radiologists for careful pre-operative planning thus helping them in avoidingpotentially life threatening complications. G46.3 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. VA- PICA variation where the VA continued as posterior inferior cerebellar artery wasobserved in 8 subjects (4 right, 4 left). Variations observed included Unilateral aplasia ofPICA in 16% with equal prevalence on both sides bilateral aplasia in 3% cases hypoplasia of RPICA in10% andhypoplasia of LPICA in 6%. Mean diameter inmales was 1.75☐.62 mm and in females was 1.73☐.62 mm. Results: Mean diameter of PICA was 1.76☐.64 mm on right side and 1.73☐.60 mm on left side. Thediameters of PICAs of both sides were measured and variations encountered were noted. ![]() The study focuses on normal and variant anatomy of PICA in Uttar Pradesh regionof North India.Materials and Methods: The study population included 100 subjects, of either sex, who underwent Head and NeckCT Angiography in the Department of Radiodiagnosis, King George’s Medical College, Lucknow, Uttar Pradesh. Vestibular nuclei (CN VIII) Nausea/vomiting, vertigo, nystagmus. Nucleus ambiguus (CN IX, X, XI) Dysphagia, hoarseness, decreased gag reflex, hiccups. Anatomically the infarcted area in Wallenberg syndrome is supplied by the posterior. Posterior Inferior Cerebellar Artery (PICA) Also known as Lateral Medullary Syndrome or Wallenberg Syndrome. The syndrome can also be due to occlusion of the vertebral artery, or the inferior, middle, or superior medullary vessels. This may lead to lateral medullary syndrome, alsocalled Wallenberg syndrome. The primary pathology of Wallenberg syndrome is occlusion of the posterior inferior cerebellar artery (PICA) or one of its branches (2). Occlusion or blockage of PICA may cause an infarction of the medulla oblongata which plays animportant role in circulatory and respiratory functioning. ![]() Variations of PICA are numerous but have been infrequently reported inthis region. ABSTRACT Background: Posterior Inferior cerebellar artery ( PICA) is the largest and most distal branch of Vertebral artery(VA) arising near the lower end of olive.
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