Diagnosis: Eczema coxsackium (atypical hand-foot-mouth)
A previously healthy 3-year-old boy presented with a widespread vesicular eruption predominantly affecting areas of prior eczema. The patient experienced a 5-day history of fever and irritability, followed by the development of vesicular lesions on the palms, soles, and scalp. This case highlights the atypical presentation of a common viral infection in the pediatric population.
A 3-year-old male presents with a 5-day history of fever and irritability, followed by the appearance of vesicular lesions on the palms, soles, and scalp. The patient has a history of atopic dermatitis, which has been well controlled with topical corticosteroids. On examination, numerous vesicles are noted in the affected areas, with surrounding erythema and excoriation.Vesicular lesions: Widespread distribution with concentration in areas of eczema.Pruritus: Significant itching reported by the patient.Fever: Low-grade fever noted prior to the rash.Excoriation: Evidence of secondary excoriation due to intense itching.Age: Typical age range affected is preschool children.
The rash began 5 days after the onset of fever and irritability. The patient's mother reported that other children in his daycare had similar symptoms, suggesting a possible viral etiology. He has a history of atopic dermatitis, which has been managed with topical corticosteroids. No recent travel or known sick contacts outside of daycare were reported. The family history is significant for asthma and allergic rhinitis.Onset: Rash developed 5 days after fever onset.Prior treatments: Topical corticosteroids used for eczema.Social history: Attends daycare with potential exposure to other children.Family history: Positive for atopic conditions.Past medical history: No significant chronic illnesses.
Acute / First-Line ManagementSymptomatic treatment: Topical corticosteroids (e.g., hydrocortisone 1% cream applied twice daily) for localized inflammation and itching.Antihistamines: Oral diphenhydramine 2.5 mg-5 mg, administered every 6 hours as needed for pruritus.Hydration: Encourage fluid intake to prevent dehydration from fever or vesicular lesions.Workup and Diagnostic ConfirmationClinical diagnosis: Diagnosis is primarily clinical, supported by history and presentation.Viral culture or PCR: Consider for atypical cases or severe presentations.Serology: May be useful in research settings but not routinely required.Long-Term ManagementSkin care: Continue emollients and topical corticosteroids for underlying eczema management.Education: Advise parents on the importance of hygiene to prevent spread in daycare settings.Follow-up: Schedule a follow-up visit to assess the resolution of lesions and eczema control.
Varicella (Chickenpox): Characterized by a vesicular rash in successive crops, often with systemic symptoms; history of vaccination may aid in differentiation.Herpes Simplex Virus (HSV): Typically presents with grouped vesicles on an erythematous base; history of exposure or prodromal symptoms may help distinguish.Impetigo: Superficial bacterial infection with crusted lesions; often associated with honey-colored crusts rather than vesicles.Contact Dermatitis: May present with vesicles but typically localized and associated with identifiable triggers.Scabies: Pruritic rash with burrows; vesicles may be present, but distribution and pruritus timing differ.Hand, Foot, and Mouth Disease (HFMD): Characterized by oral ulcers and vesicular lesions on hands and feet; often associated with coxsackievirus.Folliculitis: Inflammation of hair follicles leading to pustules; typically localized and without systemic symptoms.Drug Eruption: May present with vesicles but usually associated with a recent medication history.
High-Yield PearlsViral Etiology: Recognize that atypical presentations of common viral infections can occur, particularly in children with underlying eczema.Diagnosis: Clinical diagnosis is often sufficient; laboratory confirmation is reserved for atypical cases.Management: Focus on symptomatic relief and management of underlying eczema to prevent exacerbation.Infection Control: Educate families on hygiene practices to minimize transmission in communal settings.Follow-Up: Regular follow-up is essential to monitor the resolution of symptoms and manage any recurrence of eczema.Viral infections can present atypically in children, especially those with pre-existing skin conditions.
Tags: eczema coxsackium, atypical HFM, pediatric