Table 2.
Characteristics and clinical data of patients with a painful hip after THA
| Pat. no. | Gender/age (y.) | Cause of pain | Cause of pain detected with planar scintigraphy + SPECT + radiograph | Cause of pain detected with SPECT-/CT | SPECT/CT classification | Add. Information through Hybrid SPECT/CT | Loosening | Standard of reference/verification |
|---|---|---|---|---|---|---|---|---|
| 1 | M/54 | Loosening of cup | Yes | Yes | A3,2/F2,1 | no | True-pos. | Surgery |
| 2 | M/58 | Unknown | n.a. | n.a | A2/F2,1 | n.a | n.a. | Follow up/persisting pain |
| 3 | M/47 | Spine | No | No | A1/F1 | No | True-neg. | Follow up/MRI confirmation of herniated vertebral disc |
| 4 | M/73 | HO | Yes | Yes | A1/F1 | No | True-neg. | Follow up |
| 5 | M/76 | Unknown | n.a. | n.a | A1/F2,1 | n.a | n.a. | Follow up/pain free under conservative treatment |
| 6 | M/58 | Loosening of stem | Yes | Yes | A1/F3,2 | No | True-pos. | Surgery |
| 7 | M/64 | Spine | No | No | A1/F1 | No | True-neg. | Surgery/MRI spinal stenosis |
| 8 | F/84 | Spine | No | Yes | A1/F1 | Detection of facet joint arthrosis and spinal stenosis | True-neg. | Surgery |
| 9 | M/58 | HO | No | Yes | A1/F1 | Localisation and differentiation of suspected loosening | True-neg. | Follow up |
| 10 | M/77 | Spine | No | No | A1/F2,1 | No | True-neg. | Follow up/MRI degenerative lumbar scoliosis |
| 11 | F/73 | HO | Yes | Yes | A1/F1 | No | True-neg. | Surgery |
| 12 | M/80 | Loosening of stem | Yes | Yes | A2/F3,1 | No | True-pos. | Surgery |
| 13 | M/82 | Neuronal | No | No | A1/F2,1 | No | True-neg. | Follow up/neurological examinations |
| 14 | M/70 | HO | No | Yes | A2/F1 | Anatomic mapping and differentiation | True-neg. | Surgery |
| 15 | M/63 | Unknown | n.a. | n.a. | A1/F1 | n.a. | n.a. | Follow up/pain free under conservative treatment |
| 16 | F/74 | HO | Yes | Yes | A1/F1 | No | True-neg. | Surgery |
| 17 | M/76 | Spine | No | No | A1/F2,1 | No | True-neg. | Surgery, lumbar decompression and stabilization |
| 18 | F/48 | Unknown | No | Yes | A1/F1 | Antetorsion stem 45°; anteversion of cup 35° - malalignment of compnents and possible impingement | n.a. | Follow up/persisting pain, malalignment |
| 19 | F/80 | Loosening of stem | Yes | Yes | A2/F3,1 | Anatomic mapping with coexisting HO | True-pos. | Surgery |
| 20 | F/81 | Loosening of stem and cerclage | No | Yes | A2/F3,2 | Improved mapping | True-pos. | Surgery |
| 21 | M/68 | Unknown | n.a. | n.a | A1/F1 | n.a | n.a. | Follow up/persisting pain |
| 22 | M/59 | Septic loosening | Yes | Yes | A1/F3,2 | No | True-pos. | Surgery/loosening was diagnosed but infection later clinically |
| 23 | F/82 | Periprosthetic stress fracture | Yes | Yes | A1/F1 | No | True-neg. | Follow up, surgery |
Abbreviations: M, male; F, female; HO, heterotopic ossifications; n.a., not applicable; True-pos., true positive; True-neg., true negative.