Tuberculous Dactylitis

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  • Is a rare manifestation of tuberculosis.
  • This radiographic manifestation is known spina ventosa, spina meaning small bone and ventosa meaning expanded with air.
  • Can mimic bone tumour, so a biopsy should be done.
  • It involves the diaphyseal expansile lesion with preservation of the periosteal cortex.

Bonus: mnemonic for dactylitis (8S)

Suppurative tenosynovitis
S.aureus
Spina ventosa (TB)
Syphilis
Sickle cell disease
Sarcoidosis
Seronegative arthropathies
Serum uric acid is high (gout)

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