DaPeCa-7: comparative assessment of fluorodeoxyglucose positron emission tomography/computed tomography (CT) and conventional diagnostic CT in diagnosis of lymph node metastases, distant metastases and incidental findings in patients with invasive penile cancer.
OBJECTIVES
To evaluate diagnostic accuracy of 18 F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) compared to contrast-enhanced CT in assessment of inguinal lymph node (ILN) metastases, distant metastases and synchronous cancers in patients with penile squamous cell carcinoma (pSCC).


PATIENTS AND METHODS
During a 4-year period, patients with pSCC were scheduled for FDG PET/CT prior to surgical treatment at two referral centres that manage all penile cancers in Denmark. The primary endpoint was diagnostic accuracy of FDG PET/CT and of CT alone with histopathology or Response Evaluation Criteria In Solid Tumors (RECIST) as reference.


RESULTS
We evaluated 171 patients for distant metastases and synchronous incident cancers and examined 286 groins in 143 patients for LN metastases by FDG PET/CT. Six groins disclosed false negatives. FDG PET/CT sensitivity was 85.4% per patient. In 135 patients (270 groins), CT images were evaluated separately and 22 groins disclosed false negatives. CT sensitivity was 47.5% per patient. FDG PET/CT detected pSCC distant metastases in seven patients. Distant metastases from other cancers were newly detected in three patients. In eight patients, an incidental synchronous cancer was detected. Seven out of the 18 distant malignancies detected depended on FDG PET information.


CONCLUSION
This study underlines the increased diagnostic accuracy of FDG PET/CT compared to CT alone in the evaluation of ILN status. In patients with palpable LNs, the advantage of FDG PET/CT over CT is less pronounced. FDG PET/CT may play a role in penile cancer evaluation.
['Jakobsen|Jakob Kristian|JK|0000-0003-1629-7411', 'Frahm Nielsen|Tomas|T|0000-0001-7972-8632', 'Ipsen|Pia|P|', 'Albrecht-Beste|Elisabeth|E|', 'Cardoso Costa|Junia|J|', 'Alslev|Louise|L|', 'Predbjørn Krarup|Kim|K|', 'Grønkaer Toft|Birgitte|B|', 'Høyer|Søren|S|', 'Bouchelouche|Kirsten|K|', 'Bjerggaard Jensen|Jørgen|J|']
D000368:Aged D002294:Carcinoma, Squamous Cell D019788:Fluorodeoxyglucose F18 D005500:Follow-Up Studies D006119:Groin D006801:Humans D033162:Incidental Findings D008198:Lymph Nodes D008207:Lymphatic Metastasis D008297:Male D008875:Middle Aged D009361:Neoplasm Invasiveness D009367:Neoplasm Staging D010412:Penile Neoplasms D000072078:Positron Emission Tomography Computed Tomography D019275:Radiopharmaceuticals D013997:Time Factors D014057:Tomography, X-Ray Computed
computed tomography lymph node metastases distant metastases penile cancer diagnostic accuracy synchronous cancer #PenileCancer #uroonc 18F-fluorodeoxyglucose positron emission tomography