Metastatic Merkel cell carcinoma
Swelling of fourth finger of the right hand.
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Intense hypermetabolic lesion (SUVmax 6.3) on the fourth finger of the right hand consistent with localization of Merkel cell carcinoma. In addition, ipsilateral axillary adenopathy is demonstrated as three FDG-avid lymph, the largest of which with SUVmax 9.5 and short axis diameter of 2.3 cm.
Biopsy revealed Merkel cell carcinoma. Many studies have demonstrated the high sensitivity and specificity of 18F-FDG PET/CT in staging Merkel cell carcinoma.