An 8-year-old girl presented with an 8-day history of a sharply demarcated, erythematous, tender pustular mass on the vertex of the scalp, associated with localized alopecia, scaling and tender cervical lymphadenopathy ( Fig. 1). Thus far, it had not responded to treatment with oral flucloxacillin. A few weeks previously, her twin brother had been commenced on topical terbinafine cream for presumed tinea corporis. His skin disease coincided with the familyÕs acquisition of two pet rats. A presumptive diagnosis of kerion celsi of the scalp was made in our patient.Skin scrapings for mycological culture and swabs for bacteriological culture were taken. The initial treatment included topical clobetasol propionate 0.05% with