The Masson-Fontana silver method for melanin resulted positive and the pigments manifested a strong argentaffin
All other normal tissues were negative, including adrenal gland, pancreas, and argentaffin
cells found in the gastrointestinal tract.
Lewin, "A colonic adenocarcinoma with argentaffin
These nodules are thought to arise from pericellular mucosal nerve plexuses, possibly owing to stimulation by argentaffin
cells that had migrated from the crypts of Lieberkuhn.
Metastasis of an argentaffin
carcinoma in the testicle.
The dusty melanin load is typically revealed using argentaffin
reaction due to Fontana-Masson staining was observed in the aortic valve leaflets, which confirmed the presence of massive melanin-like pigment in AKU aortic valve.
These cells can be classified as open or closed according to apical communication with the lumen (SANTOS; ZUCOLOTO, 1996); in argyrophillic and argentaffin
cells by the capacity to retain and reduce silver salts (GRIMELIUS; WILANDER, 1980); and in hormone producing cells (insulin, secretin, somatostatin and others), principally based on the characteristics and content of their secretory granules (POLAK et al., 1993).
A modification of the Masson-Hamperl method for staining of argentaffin
Elastic vascular sclerosis of mesenteric blood vessels in argentaffin
Intestinal-Type Endocervical Adenocarcinoma, Including Signet Ring Type.--Intestinal-type endocervical adenocarcinomas are rare tumors, predominantly composed of cells with an intestinal appearance, including goblet, argentaffin
, and rarely, Paneth cells.
As with neuroendocrine tumors from other sites, the cells are positive for argentaffin
and argyrophilic stains and show dense-core neurosecretory granules on ultrastructural examination.