Eccrine syringofibroadenoma (ESFA) is a rare neoplasm that usually presents as a solitary, often large, hyperkeratotic nodular lesion with predilection for the extremities. Histologically, there are thin anastomosing epithelial cords and strands forming a lattice and connected to the undersurface of the epidermis. Ducts are presented within the tumor. Between the strands, there is a rich fibrov...

l. Radioisotopic studies with 22Na were conducted in vitro on nerve cords of the grasshopper Melanoplus differentialis. 2. The total uptake of 22Na by nerve cords is significantly decreased by the presence of 5 mM azide in the incubation medium. 3. Six components were extracted from desaturation curves of nerve cords, after which some residual radioactivity remained in the majority of cases. 4....