PT  - JOURNAL ARTICLE
AU  - Matthew Harwood
AU  - Fiona E. Craig
AU  - Ming Yang
TI  - Rare Multisystem Histiocytic Sarcoma on <sup>18</sup>F-FDG PET/CT
AID  - 10.2967/jnmt.121.262247
DP  - 2021 Dec 01
TA  - Journal of Nuclear Medicine Technology
PG  - 358--359
VI  - 49
IP  - 4
4099  - http://tech.snmjournals.org/content/49/4/358.short
4100  - http://tech.snmjournals.org/content/49/4/358.full
SO  - J. Nucl. Med. Technol.2021 Dec 01; 49
AB  - Histiocytic sarcoma (HS) is a rare malignancy with morphologic and immunophenotypic features indicating histiocytic differentiation. We present a case of HS with multisystem involvement, including an obstructing mass in the pancreatic head. 18F-FDG PET/CT is a valuable tool in staging this rare entity and in assessing the response to therapy. Knowing the diverse metastatic pattern of HS will help avoid imaging pitfalls on clinical 18F-FDG PET/CT scans.