The occurrence of the extracellular, banded or cross-striated material has been reported in many types of tissues. It generally appears as scattered fusiform strands showing cross-banding with a periodicity of 1000 to 1500 Å as well as delicate longitudinally oriented elements. Such a banded structure (BS) first noted by Luse in a neural tumor, was confirmed by others. Similar structures have more recently been found in a variety of organs both human and animal. In our own experience they were seen in a hyperplastic parathyroid gland, follicular adenoma of thyroid gland, sarcoidosis of lymph node and in non-specific demyelinization of nerves. We should add that to our knowledge, BS has not been previously reported in the parathyroid gland or thyroid gland.
Cellular changes following direct vitamin D injection into the uraemia-induced hyperplastic parathyroid gland
