Published online Jul 26, 2021. doi: 10.12998/wjcc.v9.i21.6026
Peer-review started: March 18, 2021
First decision: April 23, 2021
Revised: May 1, 2021
Accepted: May 20, 2021
Article in press: May 20, 2021
Published online: July 26, 2021
Follicular lymphoma (FL) is more common in lymph nodes, while primary extranodal lymphomas are rare. Urinary tract lymphoid neoplasms are extremely rare, accounting for less than 5% of all extranodal lymphomas. Only one case of FL from the renal pelvis has previously been reported.
A 70-year-old male patient with a history of esophageal cancer visited our hospital for follow-up examination. Abdominal computed tomography revealed a malignant mass in the right renal pelvis. The whole-body positron emission tomography/computed tomography showed a significant increase in fluo
Extranodal FL is more common in the skin and gastrointestinal tract but rarely occurs in the urinary tract. This is the second report of primary renal FL. Localized extranodal FL is expected to have a favorable prognosis and can be cured by local resection.
Core Tip: Follicular lymphoma (FL) is more common in lymph nodes, while primary extranodal lymphomas are rare. Urinary tract lymphoid neoplasms are extremely rare, accounting for less than 5% of all extranodal lymphomas. We reported a rare case of primary FL of the renal pelvis in a 70-year-old man with a history of esophageal cancer, which was treated with surgery. Localized extranodal FL is expected to have a favorable prognosis and can be cured by local resection.