Since the establishment of the Lymphatic Tumor Registry by the American Association of Pathologists and Bacteriologists, eight years ago, much progress has been made in assembling, correlating and extending the knowledge of neoplastic conditions of lymphatic, hematopoietic and reticulo-endothelial tissues as evidenced by the recent publication of the registrar, Dr. G. R. Callender.1With these advances in the clinical, hematologic and pathologic aspects of this difficult group of neoplastic diseases there has been little attempt to collect and correlate the x-ray studies, although many reports of cases and groups of cases are found in the current literature. This paper represents an attempt to gather and correlate some of these x-ray studies through a report of some of our own cases and the review of others from the literature furnishing typical examples in the various classifications discussed by Callender.1In a further effort to clarify the subject, the group