1- To discuss some of the hand injuries that may cause chronic pain. 2- To describe the imaging features of some ofthe common as well as less frequent soft tissue and bone hand lesions and illustrate them using MRI and ultrasound.

Determining the causes of acute or chronic pain in the hand is a challenge.The imaging along with the clinical examination plays a key role in the diagnosis of these lesions. Both ultrasound and magnetic resonance are effective techniques not only to detect these injuries but also to determine severity, location, and, consequently, the prognosis This pictorial review will addressbone and soft tissues lesions of the hand including fractures, tendinopathy, synovial abnormalities and soft tissue masses.

GLOMUS TUMOR The normal subungual space is very small, with a thickness of only 1–2 mm. Various types of tumors can affect the subungual space and includes benign solid tumors (glomus tumor, subungual exostosis, soft-tissue chondroma, keratoacanthoma, hemangioma, lobular capillary hemangioma), benign cystic lesions (epidermal and mucoid cysts), and malignant tumors (squamous cell carcinoma, malignant melanoma) [1]. Glomus tumors represent 1- 5% of the soft-tissue tumors in the hand. At pathologic examination, glomus tumors are hamartomas developed from the neuromyoarterial glomus bodies which are highly...

Ultrasound and MRI play an important role in the diagnosis and characterization of soft tissue and bone hand lesions and radiologists must be familiar with the imaging features that enable to make the correct diagnosis.

AUTHORS ADONIS MANZELLA, MD MSc [email protected] CLAUDIA FONTAN, MD JULIANA GOMES, MD LIDIANNE MEDINA, MD Centro de Diagnóstico Lucilo Ávila Júnior

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