PAS-positive lymphatic cells in angioimmunoblastic lymphadenopathy.

Cytological preparations have been investigated with the PAS-reaction in 8 cases of angioimmunoblastic lymphadenopathy, 7 of which were angioimmunoblastic lymphadenopathy, 7 of which were malignant, including 2 cases of "plasmoblastic" sarcoma. The two sarcoma cases showed intensely PAS-positive tumor cells similar to those known from acute leukemias and malignant lymphomas. Two cases of malignant angioimmunoblastic lymphadenopathy disclosed very many, two more such cases only occasionally positive cells. One malignant case only was completely negative. Some positive cells were found in the case that appeared benign. The PAS reaction is recommended as a diagnostic aid in angioimmunoblastic lymphadenopathy.