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A Case Report of Culture-Negative Necrotizing Fasciitis With Low Laboratory Risk Indicator for Necrotizing Fasciitis
Azeem Rathore1, Daniel A Reich2, Nadim Qadir3
1Internal Medicine, University of Florida College of Medicine - Jacksonville, Jacksonville, USA.
Abstract:
The Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) score is a diagnostic tool used to help clinicians identify necrotizing fasciitis (NF) in its early stages. This tool uses six laboratory values including the patient's white blood cell count, C-reactive protein level, serum sodium level, creatinine level, and hemoglobin level to help with risk stratification. Each of these laboratory values is assigned a point value and the total score is used to determine the likelihood that a patient has NF, with a score of 6 or higher considered to be strongly indicative. The LRINEC score has gained popularity in recent years, having been included in guidelines and society recommendations for the management of NF. However, some studies have challenged the validity of the LRINEC score. Prompt and accurate diagnosis of NF is imperative given the associated mortality rate, which can be as high as 30%-40%, especially if the diagnosis is delayed. We present a case of a patient with a delayed diagnosis of NF that was initially missed in the early stages in the setting of a low LRINEC, however, growing clinical suspicion eventually led to an accurate diagnosis and management.
Insights
The Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) score aids early diagnosis of necrotizing fasciitis (NF). A case highlights that a low LRINEC score may delay diagnosis, emphasizing the need for clinical suspicion in NF identification.
Area of Science:
- Infectious Diseases
- Surgical Pathology
- Diagnostic Medicine
Background:
- Necrotizing fasciitis (NF) is a severe soft tissue infection requiring prompt diagnosis and treatment.
- The Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) score is a widely used tool for early NF detection.
- The LRINEC score utilizes six laboratory parameters to stratify patient risk.
Observation:
- This case involved a patient with delayed NF diagnosis due to an initially low LRINEC score.
- Clinical suspicion played a crucial role in overcoming the limitations of the LRINEC score.
- The patient's condition progressed despite a low initial risk score.
Findings:
- A low LRINEC score can potentially lead to missed or delayed diagnoses of necrotizing fasciitis.
- Clinical judgment remains essential in diagnosing NF, even when laboratory indicators are not suggestive.
- Prompt diagnosis and management are critical for improving outcomes in NF patients.
Implications:
- Clinicians should maintain a high index of suspicion for NF, regardless of LRINEC score.
- Further research may be needed to refine diagnostic tools for necrotizing fasciitis.
- Timely intervention based on clinical presentation is paramount in managing NF to reduce mortality.
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