Masked polycythemia vera due to iron deficiency anemiaKoma Hotta, MD1, Ryotaro Niwa, MD21Department of General Internal Medicine, Takatsuki Hospital, Osaka, Japan2Department of Hematology, Japanese Red Cross Takatsuki Hospital, Osaka, Japan

Tonsilloloth Kiyoshi Shikino, MD, PhD1, and Masatomi Ikusaka, MD, PhD11Department of General Medicine, Chiba University Hospital, JapanFunding: None.Conflicts of Interest : None.Authorship: All authors had access to the data and a role in writing the manuscript.Acknowledgments: NA.Article type: Images in Clinical MedicineRunning head: TonsillolothText word count: 166 wordsNumber of figures: 2References: 2

FDG-PET/CT is expensive but useful for diagnosing difficult cases of reactive arthritis. It can reveal enthesitis and arthritis, which are a feature of reactive arthritis.

Follicular lymphoma is the second most common type of non-Hodgkin’s lymphoma. Hepatic accumulation observed on FDG-PET/CT, which is the most useful imaging finding, is observed in 15% of cases. Secondary hepatic lymphoma is defined based on distant involvement, and it typically presents as diffuse infiltration, as in this case.

We should know that a common early pattern is radiculopathy at the level of compression along with an ascending pattern of sensory and motor symptoms in the distal lower extremities.