Patient's relative gives a history of tattoo, however it was not found during autopsy. What should be dissected to find it:
Lymph node
Skin
Spleen
Kidney
Tattoo Marks Faint or disappeared tattoo marks can be made out on histological study of the regional lymph nodesQ. In Decomposed bodies,they are made visible by treating the area with 3 %hydrogen peroxideQ.
Human identification