A 42-year-old patient is reported in whom Mycobacterium kansasii pulmonary infection preceded the development of arthritis secondary to hematogenous spread. Contributing factors included systemic lupus erythematosus and corticosteroid therapy. Further, we present evidence that in M . kansasii infections, pulmonary lesions may precede extrapulmonary disease; hematogenous spread of infection likely represents the route through which joint disease evolves; previous damage to the joint whether from intrinsic disease as in rheumatoid arthritis, or extrinsic disease as in trauma, may be necessary for the development of infectious arthritis; and lastly, dissemination often represents opportunistic infection in patients who are immunologically compromised.Disease due to Mycobacterium kansasii has a predilection for middle-aged to elderly Caucasian men and is usually confined to the lungs. Although M. kansasii is believed to be less invasive than M. tuberculosis, it has caused meningitis as well as bone and joint, genitourinary, peritoneal, and disseminated disease. The latter has occurred most commonly in hosts who are immunologically compromised (1 -4).There is no evidence that M . kansasii infections are communicable or that their incidence is increased in alcoholic, diabetic, or socioeconomically depressed patients. T h e signs, symptoms, and roentgenographic and pathologic We report a case of a 42-year-old patient with systemic lupus erythematosus and pulmonary M. kansasii infection who developed destructive polyarthritis presumably secondary to hematogenous spread.
CASE REPORT First HospitalizationA 42-year-old man entered the Portland Veterans Administration Hospital in October 1961 with hemoptysis of 6 months duration, anorexia, nightly fever (102" to 104"F), polyarthralgias involving multiple,joints of the hands, and a 25-pound weight loss of 2 months duration. Two weeks before admission he noted tenderness, swelling, and redness of the proximal interphalangeal joints of the right hand and, subsequently, of both elbows, shoulders, knees, ankles, and several toes.The patient was thin but not acutely ill. The proximal interphalangeal and metacarpophalangeal joints of both hands were erythematous, tender, and swollen. A "butterfly" malar rash was present.Hematocrit was 39%. reticulocyte count 2.5% white blood cell count 4,400 cells/cu mm with a normal differential count. The urinary sediment contained 20 to 30 red blood cells, 3 to 5 white blood cell casts, and an occasional