TABLE 2.

¹¹C-Choline PET/CT Findings Compared with Histology Results

Site	TP	FP	TN	FN
Local	13	4 (2 MRI suggesting local recurrence, PSA < 0.05 after salvage radiotherapy [biopsy FN?], 1 with new biopsy planned but not performed for medical reasons and 1 FP without doubt)	3	2
Pelvic lymph node	24	2 (1 perirectal lymph node [possibly FN biopsy; remained on later PSMA PET after salvage pelvic LND and PSA still elevated], 1 FP PSA measurement)	7	1
Bone	9	3 (1 myeloma, 1 benign acetabular lesion, 1 with later imaging positive for bone metastases [possibly FN biopsy])	2	0
Extrapelvic lymph node	1	0	1	0
Lung	1	0	3 (correctly recognized as not due to PCa: 1 lung primary, 2 inflammatory nodules)	0
Neural	1 (neural foramen)	0	0	0

TP = true-positive; FP = false-positive; TN = true-negative; FN = false-negative.

67 patients and 77 sites were biopsied. Of 67 patients, 49 had at least 1 PCa-positive biopsy site.