PMC4899702_01
Case 1: 44-year-old male with IPT. Noncontrast CT axial image shows a large, mildly hyperdense mass (arrow) with foci of negative attenuation suggestive of intralesional fat (point ROIs with attenuation values shown). The urinary bladder is displaced to the left side. [UB: Urinary bladder].
gr1.jpg
PMC4899702_01_gr1.jpg
fig1
On noncontrast CT images, performed as part of the CT-guided biopsy, the lesion showed focal areas of negative attenuation, consistent with intralesional fat (Fig. 1).
Case 1: 44-year-old male with IPT. Photomicrographs show mononuclear and polymorphonuclear cells on low-power magnification. Large multinucleated cells are scattered throughout. High-power magnification view shows polymorphonuclear cells, plasma cells, and histiocytes, consistent with IPT.
gr2.jpg
PMC4899702_01_gr2.jpg
fig2
High-power magnification showed polymorphonuclear cells, plasma cells, and histiocytes, consistent with a diagnosis of inflammatory pseudotumor (Fig. 2).
PMC4899702_02
Case 2: 47-year-old male with IPT. Contrast-enhanced CT axial image shows the left-sided hydroureteronephrosis (thin arrow) with asymmetric decreased renal parenchymal enhancement (thick arrow). The right kidney is normal.
gr3.jpg
PMC4899702_02_gr3.jpg
fig3
CT urography showed left-sided proximal and mid hydroureteronephrosis with decreased enhancement pattern of the left kidney (Fig. 3).
Case 2: 47-year-old male with IPT. Contrast-enhanced CT coronal images in nephrographic and pyelographic phases show a dilated tortuous left ureter (arrow) in the proximal and mid segments.
gr4.jpg
PMC4899702_02_gr4.jpg
fig4
The left distal ureter showed circumferential enhancing mural thickening, suggesting a transitional cell carcinoma (Figure 4, Figure 5).
Case 2: 47-year-old male with IPT. Contrast-enhanced CT sagittal images in nephrographic and pyelographic phases show a distal ureteric stricture caused by a circumferential mass (arrow). The mass also shows mild contrast enhancement in the nephrographic phase.
gr5.jpg
PMC4899702_02_gr5.jpg
fig5
The left distal ureter showed circumferential enhancing mural thickening, suggesting a transitional cell carcinoma (Figure 4, Figure 5).
Case 2: 47-year-old male with IPT. On pathology, curled muscle fibers and fibromyxoid stroma are seen on low-power magnification. High-power magnification shows muscle and clear fibromyxoid stroma within the ureteric wall. The margins of the resected ureteric segment were found to be normal.
gr6.jpg
PMC4899702_02_gr6.jpg
fig6
After wide segmental resection of the ureteric mass with uretero-ureteric anastomosis, histopathology showed curled muscle fibers and fibromyxoid stroma, consistent with a diagnosis of inflammatory pseudotumor (Fig. 6).