Table 4.
Sensitivity and specificity of PCR in the diagnosis of cutaneous tuberculosis (literature review).
| References and date | No. of samples | Sensitivity (%) | Specificity (%) |
|---|---|---|---|
| (Lee et al. 2016) | 574 | 51.1 | 86.3 |
| (Tan et al. 2001) | 105 | 100 | 100 (multi-bacillary form) |
| Overall 73 (positivity of 55% in cases of tuberculosis verrucosa and 60% in cases of lupus vulgaris; positivity of 54% for cases of erythema induratum) | not calculated (pauci-bacillary form) | ||
| (Chawla et al. 2009) | 104 | 74.1 | 96.1 |
| (Agarwal et al. 2017) | 70 | 24.5 | not calculated |
| (Salian et al. 1998) | 60 (formalin fixed paraffin embedded) | 73.6 | 100 |
| (Ogusku et al. 2003) | 37 | 43.7 | 90.4 |
| (Negi et al. 2005) | 37 | 95.2 | 100 |
| (Abdalla et al. 2009) | 34 | 88 | 83 |
| (Hsiao et al. 2003) | 34 | 56 | not calculated |
| (Lall et al. 2017) | 31 | 25.8 | not calculated |
| (Khosravi et al. 2006) | 30 (formaline fixed) | 75 | not calculated |
| (Ramam et al. 2013) | 28 | 25 | 73.7 |
| (Khine et al. 2017) | 25 | 52 | not calculated |
| (Quiros et al. 1996) | 20 | 85 | not calculated |