A middle aged patient with chronic liver disease presents with pain abdomen and distension. He also has diarrhoea and fever since one day. On examination, he is hemodynamically stable with fever of $100 \text{ °F}$. There is jaundice, pallor, pedal edema and ascites. A diagnostic paracentesis is done. Ascitic fluid protein is 0.8 gm%, sugar 100 mg%, total count $500/\text{mm}^3$ of which $85\%$ are polymorphonuclear leaukocytes and $15\%$ lymphocytes. Most likely diagnosis is:
Diagnosis of Peritonitis in Liver Disease
The patient presents with symptoms suggestive of peritonitis (pain abdomen, distension, fever) in the context of known chronic liver disease with ascites. Diagnostic paracentesis is crucial for determining the cause.
Clinical Presentation Analysis
- Patient Profile: Middle-aged with chronic liver disease, jaundice, pallor, pedal edema, and ascites, indicating advanced liver dysfunction.
- Symptoms: Abdominal pain, distension, fever ($100 \text{ °F}$), and diarrhea suggest an acute intra-abdominal inflammatory or infectious process.
- Hemodynamic Status: Stable, which is less typical for perforation peritonitis but can occur in SBP or early stages.
Paracentesis Fluid Analysis
The analysis of the ascitic fluid provides key diagnostic information:
- Ascitic Fluid Protein: $0.8 \text{ gm\%}$ (which is $8 \text{ g/L}$ or $0.8 \text{ g/dL}$). This is considered a low protein level (< $2.5 \text{ g/dL}$).
- Ascitic Fluid WBC Count: $500/\text{mm}^3$.
- Differential Count: $85\%$ Polymorphonuclear leukocytes (PMNs) and $15\%$ lymphocytes.
Calculating Neutrophilic Exudate (PMN Count)
The absolute neutrophil count (PMN count) is calculated as follows:
$ \text{PMN Count} = \text{Total WBC Count} \times (\% \text{PMNs} / 100) $
$ \text{PMN Count} = 500/\text{mm}^3 \times (85 / 100) = 425/\text{mm}^3 $
Differential Diagnosis Based on Findings
- Spontaneous Bacterial Peritonitis (SBP): Defined by an ascitic fluid PMN count $> 250/\text{mm}^3$. This condition commonly occurs in patients with cirrhosis and ascites. Low ascitic fluid protein (< $2.5 \text{ g/dL}$) is typical. The patient's PMN count of $425/\text{mm}^3$ and protein level of $0.8 \text{ g/dL}$ strongly fit this diagnosis.
- Secondary Bacterial Peritonitis: Usually results from bowel perforation or other intra-abdominal source. Often associated with higher ascitic fluid protein levels (transudate vs. exudate) and may show multiple organisms. The low protein level makes this less likely.
- Tuberculosis (TB) Peritonitis: Typically presents with high protein levels (> $2.5 \text{ g/dL}$) and often a lymphocytic predominance, although PMNs can be elevated initially. The low protein count makes TB peritonitis less likely.
- Perforation Peritonitis: Would typically involve a much higher WBC count, often positive Gram stain, and higher protein levels.
Conclusion
Based on the diagnostic paracentesis findings of a PMN count exceeding $250/\text{mm}^3$ ($425/\text{mm}^3$ in this case) and a low ascitic fluid protein level ($0.8 \text{ g/dL}$), the most likely diagnosis is Spontaneous Bacterial Peritonitis.
Important Questions from Liver Diseases
Which of the following are precipitating factors for hepatic encephalopathy ?
1. Hypokalemia
2. Septicemia
3. Increased dietary protein load
Select the correct answer using the code given below:
- Which one of the following statements is correct regarding Upper Gastro Intestinal Bleeding (UGIB)?
- Crigler-Najjar syndrome Type-I is inherited as an:
- Poorly absorbed antibiotics are often used as adjunctive therapies in patients with hepatic encephalopathy. These may include :
When the serum ascites to albumin gradient (SAAG) is less than 1.1 gm/dL, then which of the following causes of ascites may be considered?
1. Infection
2. Malignancy
3. Cardiac ascites
4. Portal hypertension
Select the correct answer using the code given below:
