What is the likely diagnosis in a patient presenting with endogenous endophthalmitis and concurrent pulmonary and hepatic abscesses?

Klebsiella pneumoniae Invasive Syndrome (KPIS)

The most likely diagnosis in a patient presenting with endogenous endophthalmitis and concurrent pulmonary and hepatic abscesses is Klebsiella pneumoniae invasive syndrome (KPIS), particularly if the patient has diabetes mellitus or is of Asian descent.

Understanding the Clinical Syndrome

This presentation represents a classic triad of KPIS—a severe, life-threatening condition caused by hypervirulent strains of Klebsiella pneumoniae. According to IDSA/ASM guidelines, endogenous endophthalmitis occurs when pathogens cross the blood-eye barrier during bacteremia or fungemia, with Klebsiella pneumoniae being a key causative organism among the Enterobacteriaceae 1.

The clinical evidence strongly supports this diagnosis:

• Multiple case series confirm this exact presentation: endophthalmitis with liver and lung abscesses caused by K. pneumoniae 2, 3, 4
• The syndrome typically originates from a hepatic abscess that seeds hematogenously to other organs, including the eye and lungs 5, 6, 7
• Diabetes mellitus is present in 50-100% of cases across multiple studies 3, 6, 7, 8

Key Diagnostic Features to Identify

Patient Risk Factors:

• Diabetes mellitus (most critical—present in up to 100% of cases)
• Asian ancestry (particularly East Asian populations show higher incidence)
• Age typically 40-70 years
• Immunocompromised states

Clinical Presentation Pattern:

• Ocular symptoms: Sudden vision loss, eye pain, redness, photophobia, eyelid swelling
• Systemic symptoms: Fever, chills, abdominal pain preceding eye symptoms by days
• Multiple organ involvement: Liver abscess (most common primary source), followed by lung, then eye

Laboratory Confirmation:

• Blood cultures positive for K. pneumoniae (bacteremia present in all cases)
• Vitreous cultures positive for K. pneumoniae when obtained
• Imaging: CT abdomen/chest revealing hepatic and pulmonary abscesses
• Hypervirulent strains (K1 and K2 serotypes most common) 5

Critical Diagnostic Approach

When endogenous endophthalmitis is identified, immediately:

1. Obtain blood cultures before antibiotics (positive in 100% of KPIS cases)
2. Perform CT abdomen and chest to identify hepatic and pulmonary abscesses
3. Check HbA1c and glucose (diabetes is the dominant risk factor)
4. Obtain vitreous tap for culture before intravitreal antibiotics
5. Screen for additional metastatic foci: brain, spine, prostate, kidneys 3, 4

Distinguishing from Other Causes

The guideline evidence indicates that while endogenous endophthalmitis can be caused by various bloodstream pathogens including Candida albicans, Aspergillus, S. aureus, S. pneumoniae, and Pseudomonas aeruginosa 1, the specific combination of endophthalmitis with hepatic AND pulmonary abscesses is pathognomonic for K. pneumoniae invasive syndrome 2, 3, 4.

Candida endophthalmitis (addressed in recent 2025 guidelines 9) typically presents with chorioretinitis in candidemic patients but does not characteristically cause the liver-lung-eye triad seen here. The Candida guideline emphasizes that echinocandins have poor posterior chamber penetration and recommends fluconazole or voriconazole for ocular candidiasis 9—but this is not the diagnosis in question.

Prognosis and Clinical Urgency

This diagnosis carries devastating implications:

• Visual prognosis is universally poor despite treatment—most patients achieve no light perception or require evisceration 3, 5, 6, 7, 8
• Mortality is significant—one patient in a recent series died from sepsis with multiorgan failure 3, 8
• Bilateral involvement occurs and represents even worse prognosis 5
• Late complications include cystoid macular edema even after successful infection control 10

Common Pitfalls to Avoid

1. Do not dismiss ocular symptoms in diabetic patients with fever—endophthalmitis may be the presenting sign of disseminated infection 2, 5
2. Do not assume isolated endophthalmitis—always search for the primary source (liver abscess in >90% of cases) 6, 7
3. Do not delay imaging—CT abdomen/chest must be performed emergently to identify abscesses requiring drainage 3, 4
4. Do not overlook Asian ancestry as a risk factor—this population has significantly higher incidence 5, 7
5. Do not wait for culture results to start treatment—empiric coverage must include K. pneumoniae when this syndrome is suspected

The combination of endogenous endophthalmitis with hepatic and pulmonary abscesses in a diabetic patient is KPIS until proven otherwise, requiring immediate blood cultures, imaging, intravitreal and systemic antibiotics, and abscess drainage to have any chance of preserving vision or life 3, 4, 8.