Ratio of marked and excised sentinel lymph nodes and scintigraphic appearance time in melanoma patients with negative sentinel lymph node.

Aim: Metastases can occur in up to 15% of all melanoma patients with negative sentinel lymph node examination (SN -). We retrospectively investigated the number of preoperatively marked sentinel lymph nodes (SNs) with lymphoscintigraphy and effectively surgically removed SNs in SN--patients with cutaneous melanoma >or=0.5 mm.

Comparison of 18F-FDG and 67Ga-citrate in sarcoidosis imaging.

Aim: (67)Ga citrate has been used long and successfully to diagnose and stage sarcoidosis. (18)F-fluorodeoxyglucose ((18)F-FDG) has been suggested as a positron emission tomography (PET) tracer for sarcoidosis imaging. This study aimed to analyze possible advantages of (18)F-FDG-PET over (67)Ga citrate scintigraphy during the primary assessment of patients with sarcoidosis.