Clinical significance of prostate 18F-labelled fluorodeoxyglucose uptake on positron emission tomography/computed tomography: A five-year review

Table 1 Characteristics of patients who had both ¹⁸F-labelled fluorodeoxyglucose positron emission tomography/computed tomography and prostate magnetic resonance imaging studies

Age(yr)	MRI before or after PET/CT?	18F-FDG PET/CTindication	Prostate SUVmax	Prostate MRI indication	MRI result	PSA (ng/mL)	Biopsy result
73	2 mo before	Bone metastases (prostate primary)	3.4	Negative TRUS biopsy	T2aNxMx	20.8	Gleason 4 + 5 = 9
72	11 mo after	Non-Hodgkin lymphoma	2.7	Elevated PSA, negative TRUS biopsy	T2aNxMx	8.8	Gleason 5 + 3 = 8
62	3 mo after	Cancer of unknown primary	3.9	Prostate cancer staging	T3bNxMx	37	Gleason 4 + 3 = 7
75	46 mo after	Head and neck cancer	3.4	Active surveillance	T1NxMx	2.28	Gleason 4 + 3 = 7
76	6 mo before	Gastrointestinal stromal tumour	3	Elevated PSA, negative TRUS biopsy	T2bNxMx	150	Gleason 3 + 4 = 7
79	22 mo after	Non-Hodgkin lymphoma	2.9	Elevated PSA	T2aNxMx	5.4	Gleason 3 + 4 = 7
66	30 mo after	Non-Hodgkin lymphoma	3.1	Active surveillance	T2cNxMx	4.8	Gleason 3 + 4 = 7
73	26 mo after	Oesophageal cancer	2.4	Active surveillance	T2cNxMx	7.8	Gleason 3 + 3 = 6
68	18 mo after	Cancer of unknown primary	3.9	Elevated PSA	T2aNxMx	6.1	Gleason 3 + 3 = 6
74	5 mo before	Oesophageal cancer	3.9	Elevated PSA	T1NxMx	7.3	Gleason 3 + 3 = 6
68	5 mo before	Hodgkin lymphoma	9.9	Elevated PSA, negative biopsy	No focus of tumour	4.7	High-grade PIN
65	39 mo before	Colorectal cancer	5.2	Elevated PSA, negative TRUS biopsy	No focus of tumour	8.6	High-grade PIN
76	34 mo before	Non-Hodgkin lymphoma	4.2	Elevated PSA	Suspicious foci bilaterally	15	Benign
67	4 mo before	Non-Hodgkin lymphoma	4.1	Incidental prostatic 18F-FDG uptake	Suspicious foci bilaterally	5.5	Benign
72	16 mo after	Pyrexia of unknown origin	2.7	Chronic urinary infection	Likely prostatitis	Not done	Biopsy not performed
78	1 mo after	Non-Hodgkin lymphoma	3.1	Elevated PSA	No focus of tumour	11.4	Biopsy not performed
61	12 mo after	Lung nodule	5.2	Elevated PSA, positive family history	No focus of tumour	4.5	Biopsy not performed
68	7 mo after	Colorectal cancer	8.8	Incidental prostatic 18F-FDG uptake	No focus of tumour	3	Biopsy not performed

SUV: Standardised uptake value, PSA: Prostate specific antigen, TRUS: Transrectal ultrasound.