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Lunula of the Wrist: How to Distinguish an Accessory Ossicle from an Ulnar Styloid Fracture After Crush Injury

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  Edited by ScholarGen MediAI Team Executive Answer A lunula is a small accessory ossicle located in the ulnar-sided wrist, between the ulnar styloid process and the triquetrum, within the region of the triangular fibrocartilage complex (TFCC). Following wrist trauma, it may mimic an acute ulnar styloid fracture. Recognition depends on its characteristic anatomical location, smooth and corticated margins, relationship to adjacent structures, and clinical correlation. In this case, radiographs of a 20-year-old man following a crush injury demonstrated an incidental lunula without an identifiable acute fracture or traumatic osseous malalignment. 1. Why This Case Matters Small osseous structures around the wrist can create substantial diagnostic uncertainty in emergency radiology. Following direct trauma, a tiny bone fragment adjacent to the ulnar styloid process may immediately raise concern for an avulsion fracture. However, not every radiopaque fragment represents an acute traumati...
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Trimalleolar-Equivalent Ankle Fracture: X-Ray and CT Findings, Syndesmotic Injury, and Surgical Management

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 Edited by ScholarGen MediAI Team Executive Answer A trimalleolar-equivalent ankle fracture is an unstable injury pattern in which a lateral malleolar fracture and medial ligament disruption produce instability resembling a conventional trimalleolar fracture, even without a medial malleolar fracture. When a posterior malleolar fracture and distal tibiofibular syndesmotic injury are also present, careful assessment of ankle alignment becomes essential. In this case, a woman in her 40s presented with right ankle pain after a fall. Radiographs demonstrated an oblique distal fibular shaft fracture, widening of the distal tibiofibular clear space, widening of the medial clear space, and a posterior malleolar fracture. The injury was classified as a Weber C fracture. Treatment included open reduction and internal fixation (ORIF) of the fibula and syndesmotic stabilization with a suture-button device. Why This Case Matters Ankle fractures are not simply problems of broken bone. The ankle ...
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Mesenteric Desmoid Tumor: CT and MRI Findings, Image-Guided Biopsy, and Modern Treatment Strategies

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 Edited by ScholarGen MediAI Team Case Overview: An Intra-Abdominal Mass in a Woman in Her 30s An intra-abdominal soft-tissue mass can present a diagnostic challenge, particularly when it lies adjacent to the small bowel and colon. Gastrointestinal stromal tumor (GIST), lymphoma, neurogenic tumors, and other mesenchymal lesions may share overlapping imaging features. This case describes a woman in her 30s who underwent evaluation of an intra-abdominal mass. Contrast-enhanced computed tomography (CT) demonstrated a relatively homogeneous, rounded soft-tissue mass in the left abdomen, adjacent to small-bowel loops and the splenic flexure. Enhancement was mild, and no conspicuous lymphadenopathy, ascites, or hepatic lesions were identified. Dual-energy CT iodine maps demonstrated mild enhancement. Subsequent magnetic resonance imaging (MRI) showed intermediate T2 signal intensity, contrast enhancement, and diffusion restriction. Ultrasound-guided biopsy established the diagnosis of me...
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