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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Diagnosis of calcium pyrophosphate dihydrate deposition disease by fine needle aspiration biopsy: a case report.

BACKGROUND: Calcium pyrophosphate dihydrate deposition disease is a relatively rare disease with variable clinical presentations. CASE: A 73-year-old man presented with worsening lower back pain and fever. Fine needle aspiration biopsy of the lumbar vertebral bodies (L3-L4) revealed abundant neutrophils admixed with small, birefringent, rhomboid crystals in Diff-Quik-stained smears. These crystals were confirmed as calcium pyrophosphate dihydrate on cell block sections. A diagnosis of osteomyelitis and calcium pyrophosphate dihydrate deposition disease was rendered. The patient was treated with antibiotics and responded well. CONCLUSION: Calcium pyrophosphate dihydrate deposition disease can be diagnosed by fine needle aspiration biopsy, and an accurate diagnosis can be greatly facilitated by cell block sections. However, such a diagnosis may be neglected if the specimen is not carefully inspected.[1]


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