Uterine Corpus Metastasis From Rectal Adenocarcinoma Detected Using 18F-FDG PET/CT

Abstract

We report an unusual case of uterine corpus metastasis from rectal adenocarcinoma detected using F-FDG PET/CT. A 47-year-old woman was diagnosed with rectal adenocarcinoma and treated with surgery and radiochemotherapy 3 years ago. During follow-up, she presented with lower abdomen pain and elevated tumor markers, but ultrasonography findings were unremarkable. We performed an F-FDG PET/CT scan, which showed intense F-FDG avidity in the myometrium of the uterine corpus. Uterine corpus metastasis was suspected, and complementary MRI and diagnostic curettage histopathology confirmed uterine metastasis from rectal adenocarcinoma.

Pulmonary Sarcomatoid Carcinoma With Epiglottis and Ileum Metastasis Detected by 18F-FDG PET/CT

“…It highlights the unique advantages of 18 F-FDG PET/CT in searching for the unsuspected metastasis. [7][8][9][10]…”

“…Epiglottis and ileum metastases are extremely rare so that we misjudge it as lymphoma or multiple primary cancers at first. It highlights the unique advantages of 18 F-FDG PET/CT in searching for the unsuspected metastasis 7–10 …”

Solitary Abdominal Wall Metastasis From Rectal Carcinoma Revealed on FDG PET/CT

“…The final pathology supported a diagnosis of metastasis from rectal carcinoma. Rare distant metastasis sites of colorectal cancer include tonsil, 1 kidney, 2 vagina, 3,4 uterus, 5,6 thigh muscle, 7 and thyroid 8 . However, solitary abdominal wall metastasis from rectal adenocarcinoma is very rare.…”

Ovarian Inflammation Mass Mimicking Recurrent Rectal Cancer 17 Years After Surgery

“…It is reported that FDG PET/CT was helpful in detecting local recurrence, especially extraluminal recurrence of rectal cancer 1–3 . Several cases have reported PET/CT findings of rare metastatic/recurrent pelvic sites from rectal cancer including vagina, 4 uterine, 5,6 and penile, 7 which were hypermetabolic masses with SUVmax ranging from 7.4 to 11. In addition to malignant metastases, active inflammation may also result in high glucose metabolism 8 .…”