Gomori methenamine-silver stain

Go·mo·ri meth·en·a·mine-sil·ver stain

(gō-mō'rē), techniques for argentaffin cells: a method using a methenamine-silver solution in combination with gold chloride, sodium thiosulfate, and safranin O; argentaffin granules appear brown-black against a green background; urates: warm sections are treated directly with a hot methenamine-silver solution to produce a blackening of urates; fungi: see Grocott-Gomori methenamine-silver stain; melanin, which reduces silver nitrate. Synonym(s): GMS stain

Go·mo·ri meth·en·a·mine-sil·ver stain

(gō-mōr'ē meth-en'ă-mēn sil'vĕr stān) Techniques for 1) argentaffin cells: a method using a methenamine-silver solution in combination with gold chloride, sodium thiosulfate, and safranin O; argentaffin granules appear brown-black against a green background; 2) urates: warm sections are treated directly with a hot methenamine-silver solution to produce a blackening of urates; 3) fungi:see Grocott-Gomori methenamine-silver stain; 4) melanin, which reduces silver nitrate.