F-18 FDG PET/CT evaluation of radiotherapy response in rare  case of mucosa-associated lymphoid tissue lymphoma.
We experienced two cases of mucosa-associated lymphoid tissue (MALT) lymphoma arising at unusual locations and used F-18 fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) to evaluate their response to radiation therapy (RT). A 62-year-old male with proven prostatic MALT lymphoma and a 43-year-old woman with proven duodenal MALT lymphoma had diffuse FDG uptake in the lesion. Both cases were treated with RT; following FDG, PET/CT showed decreased FDG uptake in each lesion. Neither patient had evidence of recurrence at more than 18 months after RT. FDG PET/CT is useful for indicating the treatment site in MALT lymphoma and in evaluation of therapeutic response following RT.
Minamimoto
Ryogo
R
Department of Radiology, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan. ryogominamimoto@yahoo.co.jp
Tateishi
Ukihide
U
Tomita
Naoto
N
Inayama
Yoshiaki
Y
Omura-Minamisawa
Motoko
M
Tayama
Yoshibumi
Y
Hata
Masaharu
M
Kubota
Yoshinobu
Y
Inoue
Tomio
T
D000328:Adult; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D018442:Lymphoma, B-Cell, Marginal Zone / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000532:radiotherapy*; D008297:Male; D008875:Middle Aged; D049268:Positron-Emission Tomography; D035583:Rare Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000532:radiotherapy*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
D019788:Fluorodeoxyglucose F18