Idiopathic retroperitoneal fibrosis arising from peritoneal space: A case report and review of literature

Table 1 Clinical and laboratory manifestations of idiopathic retroperitoneal fibrosis patients included in the present and previous studies in recent years, mean ± SD

Ref.	Number of cases	Male to female ratio	Age	Main clinical manifestations	Elevated CRP (%)	Elevated ESR (%)	Elevated serum IgG4 (%)	Diagnostic modality
Present study	1	1:0	52	No complaints	0	0	0	CT/MRI/PET-CT
Zhao et al[11]	155	2.4:1	58.1 ± 12.0	Low back pain	63	86	38	CT/MRI
Liao et al[12]	142	5.4:1	54.3 ± 11.8	Weight loss	59	63	49	CT/MRI
Hu et al[13]	70	1.1:1	52.7 ± 12.9		61	54	44	CT/MRI
Zampeli et al[14]	67	2.7:1	56.0 ± 9.2	Low back pain	78	69	36	CT/MRI
Raffiotta et al[15]	50	1.4:1	58.7 (50.9-64.0)	Low back pain	66	93	17	CT/MRI
Yachoui et al[16]	26	3.3:1	58 (53.2-64.5)	Low back pain	56	77	17	CT
Moroni et al[17]	22	1.2:1	(38-76)		72	68		PET-CT
Choi et al[18]	18	3.5:1	62 (54-65)	Flank pain				CT/MRI

CRP: C-reactive protein; ESR: Erythrocyte sedimentation rate; IgG4: Immunoglobulin G4; MRI: Magnetic resonance imaging; PET: Positron emission tomography; CT: Computed tomography.