Differential Diagnosis for Generalized Body Ache and Nausea
Single Most Likely Diagnosis
- Viral Gastroenteritis: Given the symptoms of generalized body ache and nausea that started 4 hours ago, and a similar illness in the mother 5 days ago, viral gastroenteritis is a plausible diagnosis. The negative Covid and influenza tests, along with the elevated WBC count, support this diagnosis.
Other Likely Diagnoses
- Food Poisoning: The acute onset of symptoms and the history of a similar illness in a family member suggest food poisoning as a possible diagnosis. The elevated WBC count and mild elevation in glucose also support this possibility.
- Influenza-like Illness (despite negative test): Although the influenza test is negative, it's possible that the test was done too early or was a false negative. The symptoms and elevated WBC count could still be consistent with an influenza-like illness.
- Acute Viral Syndrome: This is a broad category that includes various viral illnesses that can cause non-specific symptoms like body aches and nausea. The elevated WBC count and negative specific viral tests support this diagnosis.
Do Not Miss Diagnoses
- Appendicitis: Although the symptoms are non-specific, appendicitis can present with generalized body aches and nausea, especially if the appendix is in an atypical location. It's crucial to consider this diagnosis to avoid missing a surgical emergency.
- Sepsis: The elevated WBC count and mild elevation in glucose could be indicative of an underlying infection. Sepsis is a life-threatening condition that requires prompt recognition and treatment.
- Kidney Stone or Pyelonephritis: These conditions can cause severe pain and nausea, and the elevated WBC count could indicate an underlying infection.
Rare Diagnoses
- Hemolytic Uremic Syndrome (HUS): Although rare, HUS can cause non-specific symptoms like body aches and nausea, along with an elevated bilirubin level. The RDW-CV of 11.2% could indicate some degree of hemolysis.
- Thyroid Storm: This is a rare but life-threatening condition that can cause non-specific symptoms like body aches and nausea, along with an elevated glucose level. However, other symptoms like tachycardia, tremors, and exophthalmos would be expected.