Category: Infectious Diseases

Infection and infectious disease related articles

20 Common MCQs in The Spleen: Your Body’s Hidden Guardian

Introduction

While most people can easily point to their heart or stomach, the spleen remains a bit of a mystery. Tucked away in the upper left side of your abdomen, this fist-sized organ quietly performs some of the body’s most critical “housekeeping” and security tasks.

Where is it Located?

The spleen is located in the left upper quadrant of the abdomen, shielded by the 9th, 10th, and 11th ribs. It sits just below the diaphragm and behind the stomach. In a healthy adult, it is usually about the size of a small avocado or a clenched fist and cannot be felt through the skin.

What Does the Spleen Actually Do?

Think of your spleen as a multi-purpose facility that serves two primary systems: the immune system and the blood (hematologic) system.

  • The Blood Filter: One of its main jobs is to act as a quality control center for your blood. As blood flows through the spleen, it identifies and removes old, malformed, or damaged red blood cells.
  • Immune Surveillance: It is the largest organ in the lymphatic system. It produces and stores white blood cells (lymphocytes) and antibodies that spring into action to fight off bacteria and viruses.
  • Emergency Reservoir: The spleen acts as a backup tank, storing about one-third of the body’s platelets and a significant reserve of red blood cells. In the event of severe bleeding or physical stress, the spleen can contract to squeeze this extra blood into your circulation.
  • Recycling Center: When it breaks down old red blood cells, it carefully recycles the iron, sending it back to the bone marrow to help create new hemoglobin.

A Tale of Two Pulps

Inside the spleen’s tough outer capsule, there are two distinct types of tissue, each with a specific specialty:

  1. Red Pulp: This makes up about 80% of the organ and is responsible for the filtering and storage of blood.
  2. White Pulp: This tissue is part of the immune system. It produces white blood cells that produce antibodies to target specific infections.

Can You Live Without It?

Yes, you can live without a spleen—a condition known as asplenia. If the spleen is removed (a surgery called a splenectomy), other organs like the liver and bone marrow take over many of its duties. However, because the spleen is so vital for fighting certain types of bacteria, people without one are at a much higher risk for infections and must stay up-to-date on specific vaccinations.

Keeping Your Spleen Healthy

While many spleen issues are secondary to other conditions (like liver disease or certain cancers), you can support yours by:

  • Preventing Injury: Wear protective gear during contact sports to avoid a ruptured spleen, which is a medical emergency.
  • Hydration & Diet: Drinking plenty of water and eating nutrient-rich foods supports the lymphatic system overall.
  • Infection Control: Managing infections like mononucleosis (which can cause the spleen to enlarge, or “splenomegaly”) is key to preventing long-term damage.

Spleen MCQs (NCLEX Style)

Spleen MCQs (NCLEX Style)

1. The spleen is located in:
A. Right hypochondrium
B. Left hypochondrium
C. Epigastrium
D. Umbilical region

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Answer: B. Left hypochondrium
Explanation: The spleen lies in the LUQ under ribs 9–11.

2. The spleen becomes palpable when enlarged to:
A. 1.5 times
B. 2 times
C. 3 times
D. 5 times

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Answer: C. 3 times
Explanation: Clinically palpable when significantly enlarged.

3. Most common cause of splenomegaly worldwide:
A. Leukemia
B. Malaria
C. Cirrhosis
D. TB

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Answer: B. Malaria
Explanation: Very common in endemic regions.

4. Most common cause of splenic rupture:
A. Infection
B. Tumor
C. Trauma
D. Congenital

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Answer: C. Trauma

5. The spleen develops from:
A. Endoderm
B. Mesoderm
C. Ectoderm
D. Neural crest

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Answer: B. Mesoderm

6. Arterial supply of spleen:
A. Hepatic artery
B. SMA
C. Splenic artery
D. IMA

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Answer: C. Splenic artery

7. Splenic artery arises from:
A. Aorta
B. SMA
C. Celiac trunk
D. Renal artery

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Answer: C. Celiac trunk

8. Spleen is attached to kidney by:
A. Gastrosplenic ligament
B. Splenorenal ligament
C. Falciform ligament
D. Coronary ligament

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Answer: B. Splenorenal ligament

9. Which is NOT a function of spleen?
A. RBC destruction
B. Immunity
C. Platelet storage
D. Insulin secretion

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Answer: D. Insulin secretion

10. Spleen stores:
A. Lymphocytes only
B. RBC only
C. Platelets and RBC
D. Plasma

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Answer: C. Platelets and RBC

11. Hypersplenism causes:
A. Leukocytosis
B. Pancytopenia
C. Polycythemia
D. Thrombocytosis

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Answer: B. Pancytopenia

12. Common indication for splenectomy:
A. Iron deficiency anemia
B. ITP
C. Diabetes
D. Hypertension

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Answer: B. ITP

13. Functional asplenia is seen in:
A. Thalassemia
B. Sickle cell disease
C. Leukemia
D. Hemophilia

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Answer: B. Sickle cell disease

14. Most serious complication after splenectomy:
A. Bleeding
B. Thrombosis
C. Infection
D. Anemia

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Answer: C. Infection (OPSI)

15. Most common organism in OPSI:
A. Streptococcus pneumoniae
B. E. coli
C. Pseudomonas
D. Klebsiella

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Answer: A. Streptococcus pneumoniae

16. Essential vaccine before splenectomy:
A. Hep B
B. Rabies
C. Pneumococcal
D. BCG

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Answer: C. Pneumococcal

17. Left shoulder pain in splenic injury is:
A. Murphy sign
B. Cullen sign
C. Kehr sign
D. Rovsing sign

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Answer: C. Kehr sign

18. Most commonly injured organ in blunt trauma:
A. Liver
B. Spleen
C. Kidney
D. Pancreas

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Answer: B. Spleen

19. Howell-Jolly bodies indicate:
A. Liver disease
B. Splenic dysfunction
C. Iron deficiency
D. Infection

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Answer: B. Splenic dysfunction

20. Massive splenomegaly is seen in:
A. Appendicitis
B. CML
C. Asthma
D. Diabetes

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Answer: B. CML

Hepatitis Full lecture PPT: Hepatitis introduction, causes, viral hepatitis, treatment of hepatitis and liver function test interpretation

Introduction

Viral hepatitis in children is a primary inflammation of the liver caused by at least five specific hepatotropic viruses (A, B, C, D, and E). While often milder in pediatric patients than in adults, it can progress to acute liver failure or chronic liver disease, particularly with types B and C.

I. Classification and Etiological Profile of Primary Viral Hepatitis

The five main viruses are distinguished by their genomic structure and mode of transmission:

  • Hepatitis A Virus (HAV): An RNA virus identical to enteroviruses; transmitted primarily via the feco-oral route through contaminated food or water. It never causes chronic infection.
  • Hepatitis B Virus (HBV): A DNA virus (Dane particle) transmitted parenterally, sexually, or vertically (perinatal). It is the most common cause of acute and chronic hepatitis worldwide.
  • Hepatitis C Virus (HCV): An RNA virus primarily transmitted via percutaneous blood exposure (IV drug use, transfusions before 1991) and vertically (5-6% risk).
  • Hepatitis D Virus (HDV): A defective RNA virus that requires co-infection or superinfection with HBV to replicate, as it uses the HBV lipoprotein envelope.
  • Hepatitis E Virus (HEV): An RNA virus transmitted enterally (water-borne), similar to HAV; it is a major cause of high mortality in pregnant women.

II. High-Yield Incubation Periods and Transmission Routes

VirusIncubation PeriodMain Route of Transmission
HAV28–42 daysFeco-oral (“The vowels go through the bowels”)
HBV60–150 daysParenteral, Sexual, Vertical (Perinatal)
HCV30–60 daysParenteral (Blood exposure), Vertical
HDV60–80 daysParenteral (Requires HBV co-infection)
HEV25–60 daysFeco-oral (Often water-borne epidemics)

Exam Point: “The Window Period” In HBV infection, the “window period” occurs when HBsAg has disappeared but Anti-HBs has not yet appeared. During this time, Anti-HBc IgM is the only marker of acute infection.

III. Detailed Clinical Presentation and Extrahepatic Features

Symptoms in children are often non-specific and vary by age:

  • Prodromal Phase: Fever, malaise, anorexia, nausea, vomiting, and right upper quadrant abdominal pain.
  • Icteric Phase: Subside of fever and anorexia, followed by jaundice (1–3 days after prodrome), dark urine, and pale stools.
  • Physical Findings: Tender hepatomegaly is common; splenomegaly occurs in 30% of cases.
  • HBV Extrahepatic Manifestations: High-yield exam points include serum sickness-like syndrome, polyarteritis nodosa (PAN), and membranous glomerulonephritis.
  • Chronic Hepatitis: Defined as continuing inflammation for \(\ge\)3–6 months; markers include persistently raised transaminases.

IV. Interpretation of Serological Markers (Crucial for MD Exams)

Diagnostic confirmation relies heavily on serology:

  • HAV: Diagnosis by Anti-HAV IgM (acute); Anti-HAV IgG indicates past infection and lifelong immunity.
  • HBV Complex Serology:
    • HBsAg: Indicates current infection (acute or chronic).
    • Anti-HBs: Indicates immunity (either via vaccine or recovered infection).
    • Anti-HBc IgM: Indicates acute/recent infection (useful in the window period).
    • Anti-HBc IgG: Indicates past or chronic infection.
    • HBeAg: Correlates with high viral replication and high infectivity.
    • Anti-HBe: Indicates lower infectivity.
  • HCV: Screen with Anti-HCV; confirm with HCV RNA PCR (detectable 1–2 weeks post-exposure).

V. Management and Pediatric Treatment Protocols

Treatment is primarily supportive for acute cases, but chronic cases require targeted therapy:

  • Supportive Care: Bed rest during jaundice, high carbohydrate diet, and avoidance of fats and hepatotoxic drugs (e.g., paracetamol, chlorpromazine).
  • Chronic HBV: Preferred treatments include Entecavir (\(\ge\)2 years) or Tenofovir (\(\ge\)12 years). Interferon-alfa is also an option for children 1–18 years.
  • Chronic HCV: Revolutionized by Direct-Acting Antivirals (DAAs). Recommended for all children \(\ge\)3 years. Regimens like Sofosbuvir/Ledipasvir (Harvoni) or Glecaprevir/Pibrentasvir (Mavyret) are highly effective.
  • Fulminant Hepatitis: Requires ICU admission, management of cerebral edema (Mannitol), and evaluation for liver transplantation.

VI. Prevention and Post-Exposure Prophylaxis (PEP)

  • Hepatitis A Vaccine: Two-dose series starting at 12 months.
  • Hepatitis B Vaccine: Routine three-dose series at birth, 1–2 months, and 6 months.
  • Perinatal HBV PEP: If a mother is HBsAg-positive, the neonate must receive HBIG (0.5 mL) and the first HBV vaccine dose within 12 hours of birth at separate sites.
  • Hygiene: Improving water supply and personal hygiene is the mainstay for preventing enteral (A and E) types.

High-Yield Laboratory “Rule of Thumb”: In acute viral hepatitis, ALT is typically > AST. If AST is twice as high as ALT, consider other etiologies like alcoholic hepatitis or hemolysis. Very high levels (>1000 U/L) are characteristic of acute viral or toxic injury.

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