page_title: Scrotal ultrasound
section_title: Mesothelioma
hierarchical_section_title: Scrotal ultrasound / Extratesticular tumors / Mesothelioma
caption_attribution_description: English: Scrotal ultrasonography of a mesothelioma.
context_page_description: Scrotal ultrasound is a medical ultrasound examination of the scrotum. It is used in the evaluation of testicular pain, and can help identify solid masses.
context_section_description: Malignant mesothelioma is an uncommon tumor arising in body cavities lined by
  mesothelium. The majority of these tumors are found in the pleura, peritoneum and less
  frequently pericardium. As the tunica vaginalis is a layer of reflected peritoneum,
  mesothelioma can occur in the scrotal sac. Although trauma, herniorrhaphy and long term
  hydrocele have been considered as the predisposing factors for development of malignant mesothelioma, the only well
  established risk factor is asbestos exposure. Patients with
  malignant mesothelioma of the tunica vaginalis frequently have a progressively enlarging
  hydrocele and less frequently a scrotal mass, rapid re-accumulation of fluid after aspiration
  raises the suggestion of malignancy.
  The reported ultrasound features of mesothelioma of the tunica vaginalis testis are variable.
  Hydrocele, either simple or complex is present and may be associated with:
  multiple extratesticular papillary projections of mixed echogenicity;
  multiple extratesticular nodular masses of increased echogenicity;
  focal irregular thickening of the tunica vaginalis testis; (4) a simple
  hydrocele as the only finding and
  A single hypoechoic mass located in the epididymal head. With color Doppler sonography, mesothelioma is hypovascular [Fig. 12].
caption: Mesothelioma arising from the tunica vaginalis. Color Doppler ultrasound demonstrates a well-defined hypoechoic nodule occupying the left epididymal head, with a few areas of color flow demonstrated. The left testis is intact with no focal nodule detected. Hydrocele is also present.[citation needed]
exif: {"Image Orientation": "Horizontal (normal)"}