Chapter 6- The Spleen

The spleen should never measure more than-

12 to 13 cm

The spleen begins to develop around the __ of gestation.

5th week

Epstein-Barr virus

Associated with infectious mononucleosis will result in splenomegaly

Splenic hamartomas are associated with-

Beckwith-Wiedemann syndrome and tuberous sclerosis

Splenic hamartoma

Benign, hypoechoic mass.

A 14-year-old male patient presents to the sonography department after falling from his bicycle. An abdominal sonogram reveals a complex-appearing mass within the spleen. This most likely represents a: A) splenic hemangioma B) splenic granuloma C) splenic hematoma D) splenic infarct

C) splenic hematoma

Both asplenia and polysplenia have been associated with some ___.

Complex cardiac malformations

What does the red pulp do?

Contains red blood cells and macrophages, performs the phagocytic function of the spleen.

A 20 year old pt with a long-standing hx of multiple sickle cell crises and subsequent splenic infarctions presents to the sonography department for an abdominal us. After thoroughly evaluating the LUQ, only a fraction of the splenic tissue can be identified. This describes the process of: A) splenomicroly B) asplenia C) splenosis D) autosplenectomy

D) autosplenectomy

All of the following are functions of the spleen except: A) storage of iron B) defense against disease C) blood reservoir D) destruction of phagocytic cells

D) destruction of phagocytic cells

A 35 year old male pt presents to the sonography department for an abdominal sonogram with a hx of abdominal pain and histoplasmosis. What are you more likely to identify within the spleen? A) multiple histomas B) multiple hemangiomas C) multiple metastatic lesions D) multiple granulomas

D) multiple granulomas

All of the following can be associated with spenomegaly except: A) trauma B) hemolytic abnormalities C) mononucleosis D) pancreatisis

D) pancreatitis

Role of spleen in childhood?

Defense against infection

Primary objective of spleen?

Filter the peripheral blood

In a patient with suspected lymphoma, the presence of Reed-Sternberg cells indicates:

Hodgkin lymphoma

The spleen is considered the largest ___ of the body?

Lymphatic organ

Most common cause of splenomegaly-

Portal hypertension

Spleen is composed of specialized tissue called __ and __.

Red pulp and white pulp

Granulomatous disease in the spleen

Small echogenic foci, individual or multiple and may produce acoustic shadow.

Spleen may appear to be divided by a hyperechoic line, termed?

Splenic cleft

Most common mass of the spleen-

Splenic hemangioma

A 15 year old male patient presents to the sonography department with a hx of left sided trauma 5 years earlier. He currently has no LUQ discomfort. the sonographic findings of the spleen include a mass that contains calcifications producing distinct posterior shadowing. what is the most likely diagnosis?

Splenic hematoma

An area within the spleen that has become necrotic because of a lack of oxygen is referred to as a:

Splenic infarct

Individuals with wandering spleen may suffer from-

Splenic torsion

Most common abnormality of the spleen is-

Splenomegaly

___ describes the implantation of ectopic splenic tissue possibly secondary to splenic rupture.

Splenosis

Splenic infarct

Tissue that has been deprived of oxygen and eventually dies.

Splenic ligaments are absent or underdeveloped, allowing the spleen to be highly mobile is termed-

Wandering spleen

Primary malignant tumor of the spleen-

angiosarcoma

Splenic infarct is typically seen as-

hypoechoic, wedge shaped mass

The spleen is an ____ organ.

intraperitoneal

What does the white pulp do?

lymphatic function; produces lymphocytes to aid in immune response.

Spleen produces __ and __ in adults.

lymphocytes and monocytes