The morphology of mast cells in the skin lesion from a case of urticaria pigmentosa was observed using light and electron microscopy. Furthermore, the IgE deposition on mast cells in the lesion was studied with immunoelectron microscopy. Diaminobenzidine reaction and 4-chloro-naphthol reaction were used to detect endogenous peroxidase activity in mast cells in the lesion. Ultracytochemical techniques were applied to clarify the localization of peroxidase activity in the mast cells. Morphologically, neither blast-like cells nor intermediate cells between basophils and mast cells were found in the lesion. No mast cells in the lesion did exhibit IgE deposition on their plasma membrane. By light microscopy, granular stains of diaminobenzidine reaction and 4-chloro-naphthol reaction were observed in the cytoplasm of mast cells in the lesion. By electron microscopy, a finely stippled peroxidase staining was observed in some granules of the mast cells. Perinuclear cisterna and endoplasmic reticulum appeared devoid of enzymatic activity. These findings suggest that the infiltrating mast cells in this case were immature.

This content is only available via PDF.
Copyright / Drug Dosage / Disclaimer
Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.
You do not currently have access to this content.