We present the case of a 25-year-old man who developed a brachial artery pseudoaneurysm and a subsequent haematoma after a penetrating injury with a window glass. A surgical excision of the pseudoaneurysm (anterior access) and a drainage of the haematoma were performed. After surgery, the patient developed a median nerve paresis, secondary to the postsurgical scar located in the elbow flexure. The diagnosis of these two entities was performed with ultrasound. Ultrasonography is an excellent imaging tool to make the diagnosis of pseudoaneurysms and nerve pathology, determining the presence, localization and extent of neural damage.

Pasteurella multocida is a common cause of infection in humans subsequent to bites or scratches by dogs and, particularly, cats. This infection usually results in superficial skin and soft tissue infections. Sonography can be used for diagnosing inflammatory conditions affecting tendons, including acute and chronic tenosynovitis. P. multocida tenosynovitis is rare, and the diagnosis can be missed if adequate tests are not performed. We report 2 cases of P. multocida tenosynovitis of the hand and wrist in which sonography played a valuable role in assessing the affected tissues and guiding fine-needle aspiration of fluid accumulations in the involved tendon sheaths. The diagnosis was confirmed microbiologically in each case.