[Lung hot spot as pitfall in PET-CT interpretation: focal lung uptake of 18F-fluorodeoxyglucose]. / Foco pulmonar facticio con (18)F-FDG: posible error en la interpretación de la PET-CT.

(18)F-FDG PET-CT has become an essential tool in oncology patient management. The normal distribution of the FDG and the possible artifacts (pitfalls), including those from CT-based attenuation correction, have already been described in several reviews. However, only a few cases of FDG focal lung uptake have been reported recently. We present two cases of oncology patients during a routine follow-up with this type of pitfall, without morphological correlation in the CT scan. We repeated the study in one of them, which made it possible to verify normalization of the hyperuptake, orienting us towards a possible pitfall.

[The importance of bone scintigraphy in the diagnosis of SAPHO syndrome]. / Importancia del estudio gammagráfico óseo en el diagnóstico del síndrome de SAPHO.

The SAPHO acronym corresponds to a group of benign conditions that combine osteoarticular and skin involvement whose diagnosis is mainly clinical and is supported by imaging findings. The bone scintigraphy has a relevant role due to its sensitivity and early detection ability. We present 8 patients with SAPHO syndrome whose clinical involvement began with skin manifestations. All of them had palmoplantar pustulosis, either of recent onset or outbreak evolution. Some had associated osteoarticular pain in shoulders, sternum, lumbar area or limbs. Bone scintigraphy with Tc-99m-diphosphonate showed pathological findings in all the patients, detecting sternoclavicular joint damage, this being the most frequent involvement in 7 of them, and also in other less usual localizations.