Yuranga Weerakkody

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Pelizaeus-Merzbacher disease

1 month ago | radiopaedia.org | Yuranga Weerakkody |Jeremy Jones

Pelizaeus-Merzbacher disease (PMD) is an X-linked leukodystrophy which is characterized by an arrest in myelin development. Male patients who may present with pendular eye movements (nystagmus)hypotoniapyramidal diseaseataxiaGeneticsPelizaeus-Merzbacher disease is the result of abnormalities of the proteolipidprotein (PLP1) gene locus at Xq22. This can be either a mutation, deletion or duplication (most common) 4.
Bronchospasm | Radiology Reference Article | Radiopaedia.org

Jan 20, 2025 | radiopaedia.org | Yuranga Weerakkody |Tariq Walizai

Citation: Weerakkody Y, Walizai T, Bell D, et al. Bronchospasm. Reference article, Radiopaedia.org (Accessed on 20 Jan 2025) https://doi.org/10.53347/rID-54340 rID: 54340 Article created: 4 Jul 2017, Yuranga Weerakkody ◉ Disclosures: At the time the article was last revised Tariq Walizai had no financial relationships to ineligible companies to disclose.
Anterior cruciate ligament avulsion fracture

Dec 9, 2024 | radiopaedia.org | Yuranga Weerakkody |Henry Knipe

Anterior cruciate ligament (ACL) avulsion fractures,also known as tibial eminence avulsion fractures, are a type of knee avulsion fracture. They typically involve separation of the tibial attachment of the ACL to variable degrees, although separation at the femoral attachment is rare 5. This injury is more common in children aged 8-14 years than in adults.
Breast imaging-reporting and data system (BI-RADS)

Dec 9, 2024 | radiopaedia.org | Yuranga Weerakkody |Tariq Walizai

BI-RADS (Breast Imaging-Reporting and Data System) is a risk assessment and quality assurance tool developed by American College of Radiology that provides a widely accepted lexicon and reporting schema for imaging of the breast. It applies to mammography, ultrasound, and MRI. This article reflects the 5th edition, published in 2013 1.
Pulmonary arterial aneurysm

Dec 7, 2024 | radiopaedia.org | Yuranga Weerakkody |Vikas Shah

Pulmonary arterial aneurysms refer to a focal dilatation of the pulmonary arterial system. Overall it is considered a rare entity with autopsy prevalence rates of around 1 in 14,000 to 100,000 4,5. A true pulmonary artery aneurysm results from dilatation of all three layers of the vessel wall while a pulmonary artery pseudoaneurysm does not involve all layers of the arterial wall. Most of the aneurysms are central, affecting the main pulmonary arteries 4.
Patellar tilt angle

Dec 5, 2024 | radiopaedia.org | Yuranga Weerakkody |Henry Knipe

The patellar tilt angle is a widely used measurement to determine patellar tilt and can be used in the assessment of anterior knee pain 1-2. The patellar tilt angle can be evaluated on axial images showing the maximum cross-sectional area of the patella 5. It is measures as the angle between the posterior condylar line and a second line between the lateral edge of the lateral patellar facet and the medial edge of the medial patellar facet 4-6.
Intercostal lung hernia

Dec 3, 2024 | radiopaedia.org | Yuranga Weerakkody |Craig Hacking

An intercostal lung hernia is a form of lung herniation and is defined as a protrusion of pulmonary tissue and pleural membranes beyond the confines of the thoracic cavity through an intercostal defect/opening in the chest wall. Intercostal lung herniations are considered the commonest form of lung herniation. Patients can be asymptomatic or present with localized chest pain (latter especially in patients with prior thoracotomy or chest tube placements). They may be congenital or acquired.
Hemothorax | Radiology Reference Article | Radiopaedia.org

Nov 26, 2024 | radiopaedia.org | Yuranga Weerakkody |Tariq Walizai

A hemothorax (plural: hemothoraces), or rarely hematothorax, literally means blood within the chest, is a term usually used to describe a pleural effusion due to accumulation of blood. If a hemothorax occurs concurrently with a pneumothorax it is then termed a hemopneumothorax. A tension hemothorax refers to hemothorax that results from massive intrathoracic bleeding, causing ipsilateral lung compression and mediastinal displacement 9. Hemothoraces usually present with dyspnea or thoracic pain.
Orbital infection

Nov 23, 2024 | radiopaedia.org | Bruno Di Muzio |Yuranga Weerakkody

Orbital infection is a relatively commonly encountered pathology.
Patterns of sinonasal obstruction

Nov 17, 2024 | radiopaedia.org | Henry Knipe |Yuranga Weerakkody

Patterns of sinonasal obstruction vary, and distinguishing between them is useful for localizing the area of pathology and narrowing the differential diagnosis. Radiographic featuresBabbel et al.