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Table 3 The sites of primary tumors detected by PET-CT and the methods of obtaining biopsy to confirm/exclude their malignant nature

From: Pivotal role of PET/CT in characterization of occult metastasis with undetermined origin

Variable   %
Detection of primary lesion by PET-CT
(n = 175, 100%)
Primary lesion detected by PET-CT 60.0
No primary lesion detected by PET-CT 40.0
Site of primary lesion by PET-CT
(n = 105, 60%)
Lung 22.8
Lower GIT 8.6
Ovary 8.6
Pharynx 5.7
Pancreatic 3.4
Pleura 2.9
Upper GIT 2.9
Breast 2.9
Prostate 1.1
Kidney 1.1
Method of obtaining biopsy from primary lesion detected by PET-CT
(n = 105, 60%)
CT-guided biopsy 22.8
Endoscopic biopsy 17.0
Bronchoscopic biopsy 8.6
Needle biopsy 2.9
Nephrectomy 2.9
Transrectal US biopsy 2.9
US-guided biopsy 2.9