This issue of the Archives contains two reports of patients with occlusions or aneurysms of the ulnar artery resulting from trauma. Little and Ferguson have demonstrated the frequency of hypothenar hammer syndrome in a group of vehicle maintenance employees. Their findings confirm previous speculations that hypothenar hammer syndrome is not as rare as reports in the literature might indicate. The hypothenar hammer syndrome, thrombosis of the superficial palmar branch of the ulnar artery, should be considered in all patients with symptoms of vascular insufficiency in any finger. Symptoms may follow a single acute episode as well as chronic repeated trauma.
Millender et al describe the pathologic findings of arterial distention with organized and organizing thromboses, altered internal elastic membrane, and granulation tissue and localized hemorrhages extending into the media. These findings, they point out, are compatible with traumatic pathogenesis. Symptoms and findings consist of pain, pallor, coolness, and hyperesthesia or