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An Ultrastructural Morphometric and Immunohistochemical Analysis of Cutaneous Lymphomas and Benign Lymphocytic Infiltrates of SkinUseful Criteria for Diagnosis
Claire M. Payne, PhD;
Thomas M. Grogan, MD;
Peter J. Lynch, MD
Arch Dermatol. 1986;122(10):1139-1154.
Abstract
• Our combined ultrastructural, immunohistochemical, histologic, and clinical studies over the past five years have allowed us to compile diagnostic criteria useful in the evaluation of cutaneous lymphomas. As a group, mycosis fungoides (MF) patients could be distinguished from those with benign disorders of skin using ultrastructural morphometry (mean form factor and perimeter values), but with some overlap between groups. Another approach, the ultrastructural histogram method, however, clearly separated MF patients from patients with chronic dermatitis. Immunohistochemistry was useful in distinguishing cases of cutaneous peripheral T-cell lymphoma from MF cases on the basis of the occurrence of "novel phenotypes." Neoplastic T-cell infiltrates of skin can usually be distinguished from benign polyclonal T-cell infiltrates by the presence of one T-cell subset to the exclusion of others. Patients with convoluted B-cell lymphomas could also be distinguished from MF patients using ultrastructural morphometric dual parameter analysis. The diagnostic complexity of several cutaneous T-cell lymphoma cases is illustrated. We have emphasized in this study the strength of combining quantitative electron microscopy, immunohistochemistry, and histology in the diagnostic workup of cutaneous lymphomas. This integrative approach may be necessary to assure a definitive diagnosis in difficult cases.
(Arch Dermatol 1986;122:1139-1154)
Author Affiliations
From the Departments of Pathology (Drs Payne and Grogan) and Dermatology (Dr Lynch), University of Arizona Health Sciences Center, Tucson.
Footnotes
Accepted for publication May 6, 1986.
Reprint requests to the Department of Pathology, University of Arizona Health Sciences Center, 1501 N Campbell Ave, Tucson, AZ 85724 (Dr Payne).
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