Isolated primary cold abscess of the sternum: a rare case re
Skeletal tuberculosis (TB) accounts for 1–4% of patients with mycobacterial infection. Any bone can be a site for TB, but sternum involvement is very uncommon. Primary sternal TB without pulmonary involvement is even more uncommon.

A 23-year-old woman of Asian descent presented with a gradually progressing painless swelling on anterior chest wall for the past 5 months, with rapid increase in size in the last 1 month associated with increasing discomfort. She had no significant past history and was immunocompetent. There was no history of contact with Koch’s infection or in her family. There was no history of trauma to anterior chest wall or any surgery in the vicinity.

There was a large visible swelling on anterior chest wall that was 12.5 cm in diameter, soft, non-tender, temperature was not raised, and fluctuant. The overlying skin was normal and there was no other significant finding. There was no cervical lymphadenopathy. Chest and abdomen examinations and neurological assessment were essentially normal. Ultrasonography revealed a hypoechoic collection with approximately 180 cc contents.

Magnetic resonance imaging (MRI) showed a hyperintense collection in upper chest wall anterior to sternum measuring approximately 120 × 68 × 49 mm in size with marrow edema and cortical irregularity in left side of manubrium and another collection in vicinity which was communicating with primary swelling.

Source: Journal of Medical Case Reports

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