Discussion of Adenomatoid tumor
- Adenomatoid tumors are benign, solid extratesticular lesions that can originate from the epididymis, tunica vaginalis, or spermatic cord.
- They are the most common tumor of the epididymis
- Occur more often in the lower pole than in the upper pole by a ratio of 4:1.
- Usually an incidental finding, adenomatoid tumors manifest as a painless scrotal mass, with the majority diagnosed in patients aged 20–50 years.
- They are typically unilateral and occur more frequently on the left side.
- When they grow noninvasively into the testicular parenchyma, they can simulate intratesticular disease.
 Imaging Findings for Adenomatoid tumor
- At US, they appear as a solid extratesticular mass with variable echogenicity.
- Commonly, MR imaging demonstrates low signal intensity relative to the testicular parenchyma on T2-weighted images.
- MR imaging can aid in determining the paratesticular origin of the lesion.
- Adenomatoid tumors enhance after administration of gadolinium contrast material.
 See Also
 External Links
 References for Adenomatoid tumor
- Woojin Kim, Mark A. Rosen, Jill E. Langer, Marc P. Banner, Evan S. Siegelman, and Parvati Ramchandani. US–MR Imaging Correlation in Pathologic Conditions of the Scrotum. RadioGraphics 2007 27: 1239-1253.