@article {Tung396, author = {Kelly Tung and Allison C. Rosenthal and Fiona E. Craig and Jonathan B. Ashman and Ming Yang}, title = {Pitfall of 18F-FDG PET/CT in Characterization of Relapsed Multisystem Lymphomatoid Granulomatosis}, volume = {46}, number = {4}, pages = {396--397}, year = {2018}, doi = {10.2967/jnmt.118.212274}, publisher = {Society of Nuclear Medicine}, abstract = {We present serial 18F-FDG PET/CT findings in a case of grade 3 pulmonary lymphomatoid granulomatosis positive for the Epstein{\textendash}Barr virus. The patient experienced a transient complete response to R-CHOP chemotherapy and subsequent multisystem recurrence, predominately involving the subcutaneous region of the torso on 18F-FDG PET/CT. Biopsy of the most hypermetabolic subcutaneous lesion demonstrated grade 1 cutaneous lymphomatoid granulomatosis negative for the Epstein{\textendash}Barr virus. This report highlights the role of 18F-FDG PET/CT in characterizing and monitoring disease progression and regression, as well as the limitations of 18F-FDG PET/CT in accurate grading of multisystem recurrence, given the diversity of clinical and histopathologic features of lymphomatoid granulomatosis.}, issn = {0091-4916}, URL = {https://tech.snmjournals.org/content/46/4/396}, eprint = {https://tech.snmjournals.org/content/46/4/396.full.pdf}, journal = {Journal of Nuclear Medicine Technology} }