UCLA Radiological Sciences Proceedings is an online journal designed to provide open access, peer reviewed publications featuring the research, newest clinical practices and interesting cases encountered by faculty and trainees of UCLA Radiological Sciences and its affiliated institutions.
Volume 1, Issue 1, 2021
Alagille Syndrome is a multisystem genetic disorder characterized by paucity of interlobular bile ducts, which can lead to early cirrhosis and increase the risk of developing focal liver lesions including hepatocellular carcinoma. As a result, routine imaging surveillance is often performed in these patients. However, it can be challenging to distinguishing incidentally found benign liver tumors from their malignant counterparts in this subset of patients. Here we present the case of a giant regenerative hepatic nodule in a 17-year-old female with Alagille syndrome, and the associated imaging characteristics that favored a benign diagnosis, with benign pathology confirmed by image-guided core needle biopsy.
The sagittal band is a sheet of connective tissue that provides lateral stability to the extensor digitorum tendon at the metacarpal joint. It is one of the three components of the dorsal extensor hood. Rupture of the one of the sagittal bands can lead to contralateral subluxation or dislocation of the extensor tendon. Closed sagittal band injury is commonly termed ‘boxer knuckle’ as it has been historically described in professional boxers who have sustained trauma to their closed fists. This injury is also associated with inflammatory conditions, such as rheumatoid arthritis. In this case report, we present a 64-year-old female with no known history of rheumatoid arthritis who sustained a closed sagittal band injury from shifting position in her bed. Ultrasonography and MRI are useful in the evaluation of a sagittal band injury. Using dynamic ultrasound imaging, the extensor tendon subluxation can be visualized with metacarpophalangeal (MCP) flexion, confirming the diagnosis of sagittal band injury.
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