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A 77-year-old man developed an induration of the buttock following repeated injections of an antihypertensive remedy containing polyvinylpyrrolidone (PVP). The excised tumor had a cellular, pseudosarcomatous appearance with abundant extracellular material, and resembled a myxoid liposarcoma. All of the staining reactions and infra-red spectrophotometry of the deposition indicated the presence of PVP. The awareness of such a cellular PVP granuloma is important for surgical pathologists so as to avoid the diagnosis of sarcoma.
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