Mehlman/UW reactive/post trauma arthritis/synovial fluid normal

Question 1

M. Reactive. CP?

Answer 1

Classically presents as triad of
1) urethritis or abdominal infection
2) polyarthritis
3) “eye-itis” (i.e., conjunctivitis, episcleritis, or anterior uveitis).

Question 2

M. Reactive. CP.
Classically presents as triad of
….
2) polyarthritis
3) “eye-itis” (i.e., conjunctivitis, episcleritis, or anterior uveitis).

Answer 2

1) urethritis or abdominal infection

Question 3

M. Reactive. CP.
Classically presents as triad of
1) urethritis or abdominal infection
…..
3) “eye-itis” (i.e., conjunctivitis, episcleritis, or anterior uveitis).

Answer 3

2) polyarthritis

Question 4

M. Reactive. CP.
Classically presents as triad of
1) urethritis or abdominal infection
2) polyarthritis
….

Answer 4

3) “eye-itis” (i.e., conjunctivitis, episcleritis, or anterior uveitis).

Question 5

M. cause of reactive?

Answer 5

CHLAMYDIA

gonoccus DOES NOT cause reactive on usmle

Question 6

M. what viral can cause reactive?

Answer 6

Rubella
Hep B and C

also Yersinia

Question 7

M. reactive part of what genetic alteration?

Answer 7

Part of HLA-B27 constellation (PAIR).

Question 8

M. post-traumatic arthritis. CP?

sito nera lapuose, tik cia.

Answer 8

Pain in joint that can present soon, or many years after, injury, where other DDx are ruled out.

Question 9

M. post-traumatic arthritis. case on 2CK.

case where it sounds like patellar tendonitis (i.e. 2 years of knee pain, first worsened with basketball, but then progresses to more constant pain), but then they go on to say that patient had fracture to proximal tibia 30 year ago and has varus deformity of the knee.

ANSWER - traumatic arthritis, not patella tendonitis.

Answer 9

the implication is that the etiology for patient’s arthritis is ultimately linked to the varus deformity from the prior injury

Question 10

UW. Synovial fluid analysis.
Appearance in normal?

Answer 10

Clear

Question 11

UW. Synovial fluid analysis.
WBC in normal?

Answer 11

<200

Question 12

UW. Synovial fluid analysis.
PMNs in normal?

Answer 12

<25 proc.

Question 13

UW. Synovial fluid analysis.
Appearance in non-inflammatory (eg OA)?

Answer 13

clear

Question 14

UW. Synovial fluid analysis.
WBC in non-inflammatory (eg OA)?

Answer 14

200 - 2000

Question 15

UW. Synovial fluid analysis.
PMNs in non-inflammatory (eg OA)?

Answer 15

25 proc.

Question 16

UW. Synovial fluid analysis.
Appearance in inflammatory (crystals, RA)?

Answer 16

translucent or opaque

Question 17

UW. Synovial fluid analysis.
WBCs in inflammatory (crystals, RA)?

Answer 17

2000 - 100 000

Question 18

UW. Synovial fluid analysis.
PMNs in inflammatory (crystals, RA)?

Answer 18

Often >50 proc.

Question 19

UW. Synovial fluid analysis.
Appearance septic joint?

Answer 19

Opaque

Question 20

UW. Synovial fluid analysis.
WBCs septic joint?

Answer 20

50 k - 150k

Question 21

UW. Synovial fluid analysis.
PMNs septic joint?

Answer 21

> 80 - 90 proc.