Basal-cell carcinoma
In the United States approximately 3 out of 10 caucasians develop a basal-cell carcinoma during their lifetime. This tumor accounts for approximately 70% of non-melanoma skin cancers. In 80 percent of all cases, basal-cell carcinoma affects the skin of head and neck. Furthermore, there appears to be an increase in the incidence of basal-cell cancer of the trunk in recent years.
Scrotal ultrasound
Embryonal cell carcinomas, a more aggressive tumor than
seminoma usually occurs in men in their 30s. Although it is the second most common
testicular tumor after seminoma, pure embryonal cell carcinoma is rare and constitutes only
about 3 percent of the nonseminomatous germ cell tumors. Most of the cases occur in
combination with other cell types.
At ultrasound, embryonal cell carcinomas are predominantly hypoechoic lesions with ill
defined margins and an inhomogeneous echotexture. Echogenic foci due to hemorrhage,
calcification, or fibrosis are commonly seen. Twenty percent of embryonal cell carcinomas
have cystic components. The tumor may invade into the tunica albuginea
resulting in contour distortion of the testis [Fig. 4].