Table 2 Clinical features and frequencies in this case, NPS and rheumatoid arthritis. NA: not applicable
Present case | Rheumatoid arthritis | Nail-patella syndrome (NPS) | Frequency in NPS | Ref | |
|---|---|---|---|---|---|
Arthralgia | Yes | Yes | Yes | NA | NA |
Nail deformity | Yes | Longitudinal or ridging clubbing | Absent, hypoplastic or dystrophic Longitudinal ridging, pitting, discolored or separating triangular lunules | 98% | |
Knee involvement | Yes | Inflammatory arthritis with bone erosion | Hypoplasia Aplasia Subluxation Dislocation | 74% | |
Iliac horn | Yes | No | Yes | 70–80% | [6] |
Swan-neck deformity | No | Yes | Yes | 58% | [1] |
Morning stiffness | Yes | Yes | No | NA | [3] |
Eye involvement | Yes (glaucoma) | Scleritis Uveitis Primary open-angle glaucoma | Primary open-angle glaucoma | 9.6% | |
Renal involvement | No | No | Various abnormality | NA | [5] |
Proteinuria | No | No | Yes | 21% | [4] |
Microscopic hematuria | No | No | Yes | 18% | [4] |