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Dermic peripheral microangiopathy in plasmo-proliferative disorders
Abstract:
Skin biopsy specimens from 12 patients with plasmo-proliferative disease (myeloma and macrogobulinemia) were histopathologically and histochemically examined. In all the cases studied (by a biopsy obtained from the hand) there were alterations in the dermal microvasculature characterized by thickening of the PAS-stained basal membrane, endothelial swelling and proliferation with partial obliteration of the vascular lumen. The lesions were morphologically similar to those found in diabetic and paralymphomatous microangiopathy but in the present investigations greater endothelial proliferation has been observed. We did not find any lesions in the healthy control group. Different immunological, metabolic and hyperviscosity mechanisms are discussed. It is interesting to report that the results for blood coagulation and carbohydrate metabolism were normal; hyperviscosity was found in the serum of the patients examined, and in 3 cases cryoglobulinemia was also found. It will be interesting to carry out further investigations on the different pathogenic and biological aspects of the skin microvascular lesions in plasmo-proliferative diseases in order to increase our knowledge of the microcirculation in immunologic malignant disorders.
Insights
Skin biopsies from patients with plasmo-proliferative diseases revealed dermal microvascular damage, including thickened basal membranes and endothelial proliferation. These findings highlight potential microcirculation issues in immunologic malignant disorders.
Area of Science:
- Dermatology
- Hematology
- Pathology
Background:
- Plasmo-proliferative diseases, such as myeloma and macroglobulinemia, can affect various organ systems.
- Microvascular alterations are increasingly recognized as a component of systemic diseases.
Purpose of the Study:
- To investigate histopathological and histochemical changes in dermal microvasculature of patients with plasmo-proliferative diseases.
- To compare these changes with other microangiopathies and identify potential pathogenic mechanisms.
Main Methods:
- Histopathological and histochemical examination of skin biopsy specimens from 12 patients.
- Morphological analysis of dermal microvasculature, including basal membrane and endothelial cells.
- Assessment of blood coagulation, carbohydrate metabolism, serum hyperviscosity, and cryoglobulinemia.
Main Results:
- All patients exhibited dermal microvascular alterations: thickened PAS-stained basal membrane, endothelial swelling, and proliferation leading to partial lumen obliteration.
- Lesions were similar to diabetic and paralymphomatous microangiopathy, but with more pronounced endothelial proliferation.
- No lesions were observed in healthy controls.
- Normal blood coagulation and carbohydrate metabolism; serum hyperviscosity was present in all patients, with cryoglobulinemia in three.
Conclusions:
- Dermal microvascular lesions are characteristic of plasmo-proliferative diseases.
- Endothelial proliferation is a prominent feature, distinguishing these lesions from other microangiopathies.
- Further research is needed to elucidate the pathogenic and biological aspects of these microvascular changes in immunologic malignant disorders.