- See:
Synovial F. Exam
-
ewing's sarcoma
-
neuroblastoma
-
rheumatoid flare
-
monarticular JRA - knee is less painful, and ROM is > than expected w/ large effusion;
-
acute rheumatic fever: less frequent, more painful with less effusion;
-
toxic synovitis of the hip
-
multiple myeloma (presents w/ strep infection of knee or hip)
-
lyme disease
-
sickle cell crises
-
legg calve perthes disease
-
SCFE
-
gonococcal arthritis
- adjacent osteomyelitis
- schonlein-henoch purpura
-
hemophilia
-
gout
-
pseudogout
- primary menigococcal arthritis:
- is unusual disease, frequently characterized by erythematous maculopapular or petechial rash & multiple joint involvement w/
80-90 % positive joint cultures;
- frequently an orthopod is asked to see child w/ apparent septic joint who is 5-7 days into ATB Rx for meningo meningitis;
- these cases often represent an Arthus reaction caused by the newly produced circulating antibodies and bacterial antigens in serum;
- similar situation is seen following
Streptococcal arthritis;
