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M Dictor

Publications and source records attributed to M Dictor.

59 records · Page 4Linked to original sources
PubMed1981

Systemic amyloidosis and non-hematologic malignancy in a large autopsy series.

A series of 24,388 consecutive autopsies yielded 148 cases of amyloidosis, for which the associated diseases were tabulated. 13 solid primary malignancies were found in eleven patients, including one mucoepidermoid cancer of the parotid and one thymoma; two out of eleven had evidence of pyelonephritis. Five patients suffered from past or present renal adenocarcinoma, the most common carcinomatous cause of amyloidosis. Systemic amyloid deposits thus occurred in 2.1% of autopsied patients with renal carcinoma, but showed no obvious correlation with tumor stage or histologic type. Details are presented of an unusual case of hypernephroma producing a stable bronchial metastasis cuffed by nodular amyloid and dissociated by a lymphoid infiltrate containing plasma cells. The occurrence of systemic amyloidosis in non-hematologic malignancy thus appears to be a rare event, which, especially in the case of renal cancer, is assumed to be due to amyloid-fibril protein AA.

Aged↗
PubMed1980

Immunoblastic sarcoma after thymus epithelial graft in an immunodeficient child.

A 3 1/2-year-old girl with severe combined immunodeficiency received a thymus epithelial graft. After transient clinical and in vitro immunologic improvement, she developed fever, lung infiltrates and, terminally, massive gastrointestinal bleeding only 2 1/2 months after transplantation. Autopsy revealed widespread immunoblastic sarcoma involving both transplantation sites in the mesentery and thigh, lymph nodes, lung, liver, spleen and gastrointestinal tract. This B cell lymphoma was likely induced by the grafted thymus epithelium.

Child, Preschool↗
PubMed1979

Fatal lymphoma after transplantation of cultured thymus in children with combined immunodeficiency disease.

A fatal, widespread, polyclonal, B-cell immunoblastic lymphoproliferative disorder developed in three children with combined immunodeficiency shortly after intra-abdominal transplantation of cultured thymus epithelium for immunoreconstitution. All three had surface immunoglobulin-bearing cells (15 to 20 per cent) in the peripheral blood before transplantation and polyclonally elevated immunoglobulins afterward. Abnormal immunoregulation was demonstrated by a lack of concanavalin A-induced suppressor-cell activity in mixed leukocyte culture in all three patients before transplantation and in two afterward. We suggest that the transplant acted as a promoter through immunostimulation or production of promoter factors, and that excessive polyclonal B-cell proliferation resulted because of inadequate immunoregulatory mechanisms. Although this complication occurred in only three of 30 patients with various forms of immunodeficiency treated with cultured thymus, these cases illustrate a potential problem in immunoreconstitution of combined immunodeficiency disorders.

B-Lymphocytes↗