Diagnosis: Tinea capitis presenting as kerion
A 7-year-old boy presents with a boggy, inflammatory scalp mass accompanied by pustules, having experienced progressive hair loss over the past month. Examination reveals a tender, erythematous area with seropurulent drainage, raising suspicion for a fungal infection. This case illustrates the clinical characteristics and management of a kerion, a severe inflammatory response to tinea capitis.
A 7-year-old male presents with a 4-week history of a painful, swollen scalp. The mother reports that he has been scratching the area, leading to increased redness and discharge. On examination, there is a boggy, erythematous mass on the scalp with pustules and hair loss in the involved area. The surrounding scalp is tender to palpation, and there are crusts present.Age: 7 yearsDuration: 4 weeksKey complaint: Painful scalp massExam findings: Boggy mass with pustulesAssociated symptoms: Pruritus and hair loss
The patient’s symptoms began approximately 4 weeks prior, following a recent visit to a friend’s house where several children were reported to have similar scalp issues. There is no significant past medical history, and he is otherwise healthy. The child has not received any prior treatments for this condition. Family history is unremarkable for dermatological disorders, and there are no pets at home.Onset: 4 weeks agoPossible trigger: Exposure to infected peersPrior treatments: NonePast medical history: No significant findingsFamily history: No dermatological conditionsSocial history: No pets at home
Acute / First-Line ManagementOral Griseofulvin: 20 mg/kg/day for a duration of 6-12 weeks, depending on clinical response.Terbinafine: 250 mg daily for children over 20 kg, for 6 weeks.Topical antifungals: May be used adjunctively, such as ketoconazole shampoo, applied twice weekly.Workup and Diagnostic ConfirmationKOH preparation: Scraping of the affected area can reveal hyphae and spores.Culture: Fungal culture from the scalp may be performed to identify the causative organism.Dermatoscopy: Can aid in examining the lesions for characteristic findings.Long-Term ManagementFollow-up: Regular follow-up visits every 4-6 weeks to monitor treatment response.Education: Instruct caregivers on hygiene and prevention of spread.Consider re-evaluation: If no improvement is noted within 6 weeks, consider alternative diagnoses or resistance.
Folliculitis: Inflammation of hair follicles that can present with pustules; often less extensive and not associated with significant hair loss.Abscess: A localized collection of pus that is typically more painful and may not have associated scaling or crusting.Scalp psoriasis: Presents with silvery scales and well-defined plaques; often has a family history and responds to topical steroids.Atopic dermatitis: Can cause localized lesions on the scalp but is usually associated with a history of eczema elsewhere.Seborrheic dermatitis: Characterized by greasy, yellowish scales; typically not as inflammatory or boggy.Impetigo: Bacterial infection that may present with crusted lesions; usually has a distinct honey-colored crust.Dermatophyte infection (non-kerion): Classic tinea capitis may present with scaling and hair loss but lacks the inflammatory component of a kerion.Scalp trauma: Can lead to secondary infections or inflammatory responses that may mimic a kerion.
High-Yield PearlsKerion: A severe inflammatory reaction to tinea capitis that can mimic other scalp conditions.Diagnosis: Confirm with KOH prep and culture to guide appropriate antifungal therapy.Management: Oral antifungals are the cornerstone of treatment for kerion, with griseofulvin and terbinafine as first-line options.Follow-up: Regular monitoring is essential to assess treatment response and prevent complications.Education: Patient and caregiver education regarding hygiene and infection prevention is crucial for management.Prompt recognition and treatment of kerion can prevent long-term complications such as scarring alopecia.
Tags: tinea capitis, kerion