Adenomatoid tumours of the scrotum are benign, solid extratesticular lesions that can originate from the epididymis, tunica vaginalis, or spermatic cord(90% derived from the funiculus).
They are the most common extratesticular neoplasm, and most common tumour of the epididymis, and 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 small (usually under 2 cm)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 non-invasively into the testicular parenchyma, they can simulate intratesticular disease.
On ultrasound they appear as a well defined solid extratesticular mass with variable echogenicity.
MR imaging can aid in determining the paratesticular origin of the lesion.
- T2 - low signal intensity relative to the testicular parenchyma
- T1 C+ (Gd) - show enhancement
General imaging differential considerations include :
- testicular lipoma
- testicular rhabdomyosarcoma
- testicular liposarcoma
- supernumerary testes(a rare condition in which more than
two testes are present)
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- 1. Kim W, Rosen MA, Langer JE et-al. US MR imaging correlation in pathologic conditions of the scrotum. Radiographics. 27 (5): 1239-53. doi:10.1148/rg.275065172 - Pubmed citation
- 2. Patel MD, Silva AC. MRI of an adenomatoid tumor of the tunica albuginea. AJR Am J Roentgenol. 2004;182 (2): 415-7. AJR Am J Roentgenol (full text) - Pubmed citation
- 3. Garriga V, Serrano A, Marin A et-al. US of the tunica vaginalis testis: anatomic relationships and pathologic conditions. Radiographics. 2009;29 (7): 2017-32. doi:10.1148/rg.297095040 - Pubmed citation
- Goldberg BB, McGahan JP. Atlas of ultrasound measurements. Mosby Inc. (2006) ISBN:032303229X. Read it at Google Books - Find it at Amazon
Synonyms & Alternative Spellings
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