Differential Diagnosis
- Single most likely diagnosis
- C. Coxsackie A virus: This is the most likely diagnosis due to the presence of oral vesicles and a rash on the hands, feet, and buttocks, which is consistent with Hand, Foot, and Mouth Disease (HFMD), a common illness caused by Coxsackie A virus.
- Other Likely diagnoses
- E. Human herpes virus 6: This virus can cause roseola, which is characterized by a high fever and a rash that appears after the fever resolves. However, the presence of oral vesicles is not typical for roseola.
- A. Herpes simplex virus 1: Although HSV-1 can cause oral vesicles, it typically does not cause a rash on the hands and feet.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- B. Varicella zoster virus: Although the rash is not typical for chickenpox, it's essential to consider this diagnosis due to the potential severity of the illness, especially if the child is immunocompromised.
- G. Epstein-Barr virus: EBV can cause infectious mononucleosis, which can present with a sore throat and fever. Although a rash is not a typical symptom, it can occur, especially if the patient is taking certain medications like ampicillin.
- Rare diagnoses
- D. Rubella virus: Rubella is a rare illness in countries with widespread vaccination, and the symptoms do not perfectly match the presentation of rubella.
- F. Parvovirus B19: This virus can cause erythema infectiosum (Fifth disease), which is characterized by a "slapped cheek" appearance and a lacy rash on the body. However, the presence of oral vesicles and the specific distribution of the rash make this diagnosis less likely.