PubMed · 8357379
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R Todd. 1993. Article appreciated.. https://pubmed.ncbi.nlm.nih.gov/8357379/
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An arteriovenous malformation (AVM) is an anomaly of capillary development that results in a direct connection between branches of an artery and veins, with no intervening capillary network. A definite diagnosis of AVM is usually made with angiography. We report the case of a posterior mediastinal AVM found on routine sonography in a 64-year-old woman with neglected hypertension and severe back pain. Color Doppler imaging showed 2 adjoined vascular structures without a typical mosaic-like flow pattern, and spectral Doppler analysis showed low-resistance flow and arteriovenous shunting in 2 adjoined vascular structures. The diagnosis was subsequently confirmed by angiography. Because disastrous bleeding could result if needle biopsy were performed inadvertently in the case of a suspected mediastinal AVM, we suggest that color Doppler sonography be attempted if there is an adequate acoustic window.
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We report an unusual location of a capillary vascular malformation found entirely within the flexor tendon sheath of an 8-year-old girl. Vascular malformations have been found in many locations throughout the hand but have, to our knowledge, not been reported to involve the vinculum of the flexor tendon sheath. The vascular malformation was contained completely within the sheath. Therapeutic management involved surgical excision of the vascular malformation.