A pathologist examines a renal biopsy from a 45 year old man with nephrotic syndrome and requested a congo red stain to confirm the nature of an amorphous acidophillic extracellular hyalin substances localized within the mesengial matrix of the glomeruli A positive test confirms the presence of

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Vikas Bhardwaj
Medical Technologist, AIIMS New Delhi
Updated: Apr 17, 2026