Table 2. Frequency and distribution of histopathological diagnoses of skin adnexal tumours (N = 47).

Histopathological Diagnosis	Behaviour	n	%	95% CI (%)	Concordance n (%)
Eccrine differentiation — n = 31 (66.0%; 95% CI: 51.8–80.2%)
Hidradenoma (Nodular/clear cell/benign nodular variants)	Benign	8	17	8.9 – 30.1	0 (0.0%)
Eccrine spiradenoma	Benign	4	8.5	0.6 – 16.4	0 (0.0%)
Syringoma	Benign	3	6.4	0.0 – 13.4	2 (66.7%)
Chondroid syringoma	Benign	3	6.4	0.0 – 13.4	0 (0.0%)
Eccrine poroma	Benign	2	4.3	0.0 – 10.1	0 (0.0%)
Syringocystadenoma papilliferum	Benign	2	4.3	0.0 – 10.1	0 (0.0%)
Eccrine poroma (pigmented variant)	Benign	1	2.1	0.0 – 6.2	0 (0.0%)
Naevus sebaceous with syringocystadenoma	Benign	1	2.1	0.0 – 6.2	1 (100.0%)
Cylindroma	Benign	1	2.1	0.0 – 6.2	0 (0.0%)
Malignant eccrine poroma	Malignant	2	4.3	0.0 – 10.1	1 (50.0%)
Malignant nodular Hidradenoma	Malignant	1	2.1	0.0 – 6.2	0 (0.0%)
Clear cell Hidradenocarcinoma	Malignant	1	2.1	0.0 – 6.2	0 (0.0%)
Mucinous carcinoma	Malignant	1	2.1	0.0 – 6.2	0 (0.0%)
Adenoid cystic carcinoma	Malignant	1	2.1	0.0 – 6.2	0 (0.0%)
Follicular differentiation — n = 11 (23.4%; 95% CI: 11.3–35.5%)
Pilomatricoma	Benign	5	10.6	1.9 – 19.3	0 (0.0%)
Trichoepithelioma	Benign	3	6.4	0.0 – 13.4	1 (33.3%)
Trichoblastoma	Benign	1	2.1	0.0 – 6.2	0 (0.0%)
Trichilemmal carcinoma	Malignant	2	4.3	0.0 – 10.1	1 (50.0%)
Sebaceous differentiation — n = 5 (10.6%; 95% CI: 1.9–19.3%)
Nevus sebaceous	Benign	3	6.4	0.0 – 13.4	3 (100.0%)
Sebaceous adenoma	Benign	2	4.3	0.0 – 10.1	1 (50.0%)
Total	—	47	100	—	10 (21.3%)