Psoriatic Arthritis Symptoms | Medical Algorithm

Fournie et al developed a score for the diagnosis of psoriatic arthritis. The authors are from Purpan Teaching Hospital in Toulouse, France.

Parameters:

(1) psoriasis

(2) family history of psoriasis

(3) arthritis in distal interphalangeal joint

(4) monoarthritis or asymmetrical oligoarthritis

(5) pain in buttock, heel, anterior chest wall or entheses

(6) radiological criteria (see below)

(7) human leukocyte antigen (HLA)

(8) rheumatoid factor

Radiological criteria:

(1) erosion of distal interphalangeal joint

(2) osteolysis

(3) ankylosis

(4) juxta-articular periostitis

(5) phalangeal tuft resorption

Parameter	Finding	Points
psoriasis and family history	psoriasis antedating joint symptom onset	6
	psoriasis concomitant with joint symptom onset	6
	psoriasis post-dating symptom onset	3
	family history of psoriasis	3
	none of the above	0
arthritis in distal interphalangeal joint	absent	0
	present	3
arthritis	monoarthritis	1
	asymmetrical oligoarthritis	1
	symmetrical oligoarthritis	0
	polyarthritis	0
pain	pain in buttock, heel or spontaneous anterior chest wall	2
	diffuse inflammatory pain in entheses	2
	other	0
	no pain	0
radiological criteria	none	0
	one or more present	5
HLA	B16 or B17	6
	neither	0
rheumatoid factor	present	0
	absent	4

total score =

= SUM(points for all of the parameters)

Interpretation:

• minimum score: 0

• maximum score: 27

• A score >= 11 is diagnostic for psoriatic arthritis.

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Criteria for Psoriatic Arthritis