Usefulness of ultrasonography to assess the response to steroidal therapy for the rare case of type 2b immunoglobulin G4-related sclerosing cholangitis without pancreatitis: A case report

Table 3 Usefulness of the imaging modality for immunoglobulin G4-related sclerosing cholangitis

Ref.	Modality	Use	Usefulness
Kobori et al[20]	US	Diagnosis follow up	Diagnosis, improvement after PSL
Matsumoto et al[15]	EUS	Diagnosis	Differential diagnosis from the cholangiocarcinoma
Swensson et al[18]	CT, MRI	Diagnosis	Differential diagnosis from the cholangiocarcinoma
Zhang et al[21]	Laboratory exams	Follow up	Response to PSL
Ohno et al[22]	Laparoscopy andIDUS	Diagnosis follow up	Symmetric circumferentially thickened wall (IDUS), discoloration with red lobular markings and multiple small depressed lesions
Naitoh et al[19]	IDUS, Histology	Diagnosis	Differential diagnosis from the cholangiocarcinoma
Graham et al[10]	Histology, radiologic features	Diagnosis	Differential diagnosis from the cholangiocarcinoma
Horiguchi et al[23]	IDUS, ERCP, laparoscopy	Diagnosis	Differential diagnosis from the cholangiocarcinoma
Shimizu et al[24]	EUS, IDUS, CT, MRCP	Diagnosis follow up	Diagnosis
Our case	US, EUS, ERCP, MRCP	Diagnosis, follow up	Diagnosis of isolated, type 2 IgG4-SC and response to PSL

US: Transabdominal ultrasonography; EUS: Endoscopic ultrasonography; CT: Computed tomography; MRI: Magnetic resonance imaging; IDUS; Intraductal ultrasonography; ERCP: Endoscopic retrograde cholangiopancreatography; PSL: Prednisolone.