Incidence of exclusive extrapelvic skeletal metastasis in prostate carcinoma on bone scintigraphy

Table 1 Planar bone scintigraphy findings

Pattern of uptake on bone scan	Number of patients among, n = 150
No abnormal increased osteoblastic activity	13
Increased uptake with pattern typical of degenerative changes/benign uptake	24
Multifocal increased uptake typical for metastatic disease	30
Indeterminate or suspicious for metastatic uptake where SPECT-CT was performed	83

SPECT-CT: Single photon emission computed tomography-computed tomography.

Table 2 Single photon emission computed tomography-computed tomography findings

Lesion	Number of patients among, n = 83
Benign	31
Metastatic	51
Indeterminate	1

Table 3 Location of uptake and characterization in patients with exclusive extrapelvic uptake

Site of uptake	Benign	Metastatic	Indeterminate
Vertebra	41	3	0
Ribs	7	0	0
Sternum and manubriosternal region	2	0	0
Skull	2	0	1

Table 4 Single photon emission computed tomography-computed tomography characterization of isolated extrapelvic uptake

Serial No.	Age in years	Site of uptake	SPECT-CT findings	Final diagnosis
1	67	Left 1st rib	Arthritis	Benign
2	83	Right 5th rib	Fibrous dysplasia	Benign
3	66	Right 6th rib	Fracture line likely post traumatic	Benign
4	63	Right 11th rib	Fracture line likely post traumatic	Benign
5	72	Right 6th rib	Fracture line likely post traumatic	Benign
6	60	Sternum	Manubriosternal joint	Benign
7	76	Right parietal bone	Subtle sclerosis not typical for metastatic disease	Indeterminate

SPECT-CT: Single photon emission computed tomography-computed tomography.

Table 5 Site of metastatic disease on bone scintigraphy

Site	Number of patients
Super-scan	10
Pelvic bones	68
Vertebrae	63
Ribs	55
Sternum	42
Femur	41
Scapula	41
Skull	32
Clavicle	29
Humerus	23
Others	7 (4 tibia, 2 forearm bones, 1 maxilla)