Tuberk Toraks 2014;62(2):170-171
FDG-PET/CT scan in a skin metastasis from lung cancer
Koichi KURISHIMA1, Katsunori KAGOHASHI1, Shijima TAGUCHI2, Hiroaki SATOH1
1 Department of Respiratory Medicine, Mito Medical Center, University of Tsukuba, Ibaraki, Japan
1 Tsukuba Üniversitesi Mito Tıp Merkezi, Solunum Hastalıkları Anabilim Dalı, Ibaraki, Japonya
2 Department of Dermatology, Mito Medical Center, University of Tsukuba, Ibaraki, Japan
2 Tsukuba Üniversitesi Mito Tıp Merkezi, Dermatoloji Anabilim Dalı, Ibaraki, Japonya
A 73-year-old man was referred to our hospital due to nodular mass in the right lower lobe of the lung with mediastinal lymph node involvement (Figure1A,B). On admission, physical examination revealed a soft skin nodule with a 3 cm diameter in the right back. Fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) scan showed both lung and skin tumors with accumulation of FDG (Figure1B,C). A transbronchial biopsy was done and revealed adenocarcinoma. Skin biopsy confirmed metastasis from the lung cancer. The patient had lung and bone metastases, but he had no other skin metastasis at any sites.
In our patient, the differential diagnosis of the skin nodule included epidermal cyst. FDG-PET/CT may be one of the useful imaging test for skin metastasis, although there was a case report with abnormal FDG uptake in an epidermal cyst (1,2).
CONFLICT of INTEREST
Address for Correspondence
Dr. Hiroaki Satoh
Tsubaka Üniversitesi Mito Tıp Merkezi,
İç Hastalıkları Anabilim Dalı, Miya-Machi 3-2-7,
Mito, 310-0015, IBARAKI-JAPAN