chondroitin-sulfates and Adenoma--Sweat-Gland

The distribution of immunoreactivity of bone morphogenetic protein (BMP), the glycosaminoglycans chondroitin 4-sulphate (C4SPG), chondroitin 6-sulphate (C6SPG), dermatan sulphate (DSPG) and keratan sulphate proteoglycans (KSPG), cytokeratin (K8.12), vimentin, glial fibrillary acidic protein (GFAP), actin, desmin, S-100 protein and neuron-specific enolase (NSE) in mixed tumour of the skin was investigated using immunohistochemical methods using monoclonal (MoAb) and polyclonal antibodies (PoAb). A strong BMP immunoreactivity was found characteristically in outer tumour cells of tubuloductal structures and modified myoepithelial cells. Modified myoepithelial cells and chondroidally changed cells showed positive immunoreactivity for C4SPG, C6SPG and DSPG; and KSPG was more pronounced in the modified myoepithelial cells. Vimentin, S-100 protein, GFAP and NSE, but not actin and desmin, were distribute in the outer tumour cells and modified myoepithelial cells in chondroidally changed tissue. Two factors show that chondrogenesis in mixed tumour of the skin is associated with the modified myoepithelial cells through the activity of BMP and biosynthesis of glycosaminoglycans as matrix substance. First, outer or basal tumour cells in mixed tumour of the skin is characterized by the presence of positive immunoreactivity for BMP, KSPG, vimentin, cytokeratin K8.12, S-100 protein, GFAP and NSE, and second, there is a matrix of chondroidally changed tissue containing the reaction products of C4SPG, C6SPG, DSPF and KSPG.

Topics: Actins; Adenoma, Sweat Gland; Bone Morphogenetic Proteins; Chondroitin Sulfate Proteoglycans; Chondroitin Sulfates; Dermatan Sulfate; Desmin; Glial Fibrillary Acidic Protein; Glycosaminoglycans; Humans; Keratan Sulfate; Keratins; Lumican; Phosphopyruvate Hydratase; Proteins; S100 Proteins; Sweat Gland Neoplasms; Vimentin

The case of a 38-year-old white man with a chondroid syringoma in the left side of the upper lip is reported. Histochemical study of the lesion showed that the morphologic distributions of the neutral mucosubstances, sulfated acid mucopolysaccharides, and elastic fibers in the reported case were similar to those of mixed salivary gland tumor. The recently reported ultrastructural and immunohistochemical features of chondroid syringoma are also discussed in an effort to clarify its histogenesis.

Topics: Adenoma, Sweat Gland; Adult; Chondroitin Sulfates; Elastic Tissue; Glycosaminoglycans; Humans; Lip Neoplasms; Male; Staining and Labeling