Article in Japanese

A case of Mycoplasma pneumoniae infection accompanied by various extrapulmonary manifestations without respiratory symptoms in a 6-year-old girl

Nozomi TAKAKI¹⁾, Takenori TOZAWA¹⁾, Satoru SUGIMOTO¹⁾

A 6-year-old girl was admitted to our hospital for persistent fever, erythema and migrating arthralgia. On admission, she presented with hypocomplementemia, macroscopic hematuria and proteinuria, and was suspected to have acute glomerulonephritis. A rapid test for detection of beta-haemolytic group A streptococci, anti-streptolysin O and anti-streptokinase titers yielded negative results. Her erythema multiforme and arthritis improved in response to conservative therapy. The hematuria and proteinuria disappeared and her complement titers had normalized. Eventually, Mycoplasma pneumoniae infection was suspected of involvement in her various manifestations, because an elevation of antibodies against M. pneumoniae (by PA method) was revealed. Thus, in patients who present with symptoms resembling rheumatic disease and collagen disease, M. pneumoniae infection should not be ruled out as a differential diagnosis, even in the absence of respiratory symptoms and pneumoniae.

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1) Department of Pediatrics, Ayabe City Hospital

Key words
Received	January 16, 2017
Accepted	June 12, 2017

29 (3)：253─258,2017