RT Journal Article SR Electronic T1 Cystinosis: electron microscopic evidence of lysosomal storage of cystine in lymph node JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 571 OP 575 DO 10.1136/jcp.21.5.571 VO 21 IS 5 A1 A. D. Patrick A1 B. D. Lake YR 1968 UL http://jcp.bmj.com/content/21/5/571.abstract AB Electron microscopic examination of a biopsy specimen of cystinotic lymph node demonstrated that cystine crystals were entirely intracellular, and that the majority, including those of the largest size, were enclosed by intact limiting membranes. Acid phosphatase activity was localized specifically at the periphery of the crystal profiles and the smallest crystal aggregates were contained in osmophilic dense bodies which had the appearance of progressively swollen lysosomes. The implications of the suggested lysosomal distribution of cystine are discussed.