Anatomy, Physiology & Sonography of the Penis

the penis is a

primary sex organ

the penis plays a vital role in

reproduction and urination

the penis is covered with skin, and subsequently a dense fibrous tissue termed

buck fasia

the inner penis is comprised of 3 cylinderical tissue components:

a single corpus spongiosum and a paired corpus cavernose (singular form is cavernosum)

the urethra is housed within the —, which is situated ventrally

corpus spongiosum

the paired cavernosa are situated

dorsally

— surrounds the corpus cavernosa and partially covers teh corpus spongiosum

tunica albugenia

all 3 corpura are covered by

teh buck fascia

the vascular supply of the penis begins at the —, which is a tributary to the iliac artery

internal pudendal artery

the internal pudendal artery branches into the

deep artery of the penis or penile artery

the deep artery of the penis provides blood to the

corpus cavernosa

the cavernosal arteries are located within the

corpus cavernosa bilaterally

the spongiosum will be — and consist of —

elliptical-shaped; medium- to low-level echoes

the cavernosa will appear similar in echogenicity to the spongiosum, but have a more

oval shape

the tunica albugenia, which is highly echogenic, can be seen seperating and covering the

corpora

contained within each corpus cavernosum are the —, which are identified by thier bright walls and apparent blood flow with color doppler

cavernosal arteries

in the sagittal plane, both the —

cavernosa elongate

the enlongated — can be seen within the corpus spongiosum in the sagittal plane as well

penile urethra

sonography can be used to evaluate any palpable lesions of the penis such as,

a benign fibroma or a malignant penile tumor

malignant penile tumor is most often caused by

human papillomavirus and is typically in the form of squamous cell carcinoma