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[Periureteral inflammatory pseudotumor: a case report].
Go Tanikawa1, Natsuki Takaha, Norio Nonomura
1Department of Urology, Osaka University Hospital.
Hinyokika Kiyo. Acta Urologica Japonica
|December 6, 2003
Summary
A large periureteral mass initially suspected as malignant unexpectedly regressed spontaneously. This case suggests inflammatory pseudotumor as a possibility for upper urinary tract masses, potentially avoiding surgery.
Area of Science:
- Urology
- Radiology
- Pathology
Background:
- A 59-year-old female presented with right flank pain and hydronephrosis, necessitating investigation for a periureteral mass.
- Preoperative imaging (CT and MRI) revealed an 11 cm periureteral mass, raising concerns for malignancy and prompting surgical admission.
Observation:
- Despite initial suspicion, laboratory investigations including tumor markers and urinalysis were unremarkable.
- A follow-up CT scan demonstrated significant spontaneous regression of the periureteral mass.
- The mass continued to regress over time, leading to the cancellation of planned surgery.
Findings:
- The clinical course and imaging findings strongly suggest the mass was an inflammatory pseudotumor, despite the absence of a pathological diagnosis.
- This case highlights the potential for spontaneous resolution of upper urinary tract masses.
Implications:
- The findings suggest that inflammatory pseudotumor should be considered in the differential diagnosis of upper urinary tract masses.
- Non-operative management and careful monitoring may be appropriate for certain periureteral masses, preserving urinary tract function.