We studied the intradural variations of spinal nerve rootlets in 100 cases of Korean adults. The results of the study are as follows ; 1. The incidence of intrasegmental variations (abberrant rootlets) is high in cervical segments and decreased toward lumbosacral segments. The incidence is higher in posterior rootlets than anterior, except cervical sesments. 2. The incidence of intersegmental variations is higher in posterior rootlets than anterior, and generally high in cervical and lumbar segments. 3. We divide the intersegmental variations into supernumerary rootlets, dividing rootlets, and anastomosing rootlets, and among them the incidence of anastomosing rootlets is higher. We divide the anastomosing rootlets into parallel anastomosing rootlets, uniting anastomosing rootlets, and rearrangement anastomosing rootlets. 4. The anterior to posterior anastomosing of spinal nerve rootlet is present in 4 of cases studied.
Adult ; Humans ; Incidence ; Spinal Nerves*

PURPOSE: Malignant tumors of the hand occurred very rarely and optical surgical treatment and prognosis are not clearly established. We report the clinical characteristics and treatment outcomes of primary and metastatic bone and soft tissue tumors during last twenty years with a review of literatures. MATERIALS AND METHODS: We reviewed 20 cases of malignant tumors in the hand (7 cases of acrometastasis, 9 cases of malignant melanoma, 2 cases of chondrosarcoma and 2 cases of squamous cell carcinoma) retrospectively. RESULTS: Patients of early Clark stage (I to III) of malignant melanoma survived after wide resection or ray amputation. But patients with late Clark stage (IV to V) expired associated with distant metastasis. All seven patients with acrometastasis expired in 6.3 months after diagnosis of metastasis. Two patients with chondrosarcoma survived without recurrence. Among patients with squamous cell carcinoma, one patient is free of disease after wide resection, but the other was dead due to metastasis. CONCLUSION: Good results might be attained after surgical treatment of malignant tumors of the hand by proper surgical technique to minimize loss of hand function and systemic evaluation of metastasis.
Amputation ; Carcinoma, Squamous Cell ; Chondrosarcoma ; Hand ; Humans ; Melanoma ; Neoplasm Metastasis ; Prognosis ; Recurrence