Abstract:suggestive of a¯uid collection (Figure 1). Repeat ultrasound of the swelling disclosed that the left paravertebral muscles were bulky and more echogenic than previously, with a suspicion of an echogenic area adjacent to the L3 spinous process. Immunological investigations showed a normal nitroblue tetrazolium test, negative antistaphylococcal and antinuclease antibodies and normal total immunoglobulin levels. Initial IgG2 level was low (1.14 g/L, reference range 1.4±4.5) but normal on repeat testing two weeks … Show more
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