DESCRIPTIONBrodie's abscess is a subacute or chronic variant of osteomyelitis usually involving the metaphysis of long bones. The clinical presentation is often atypical and the diagnosis is challenging. It is rare except in developing countries. A 10-year-old Tunisian girl reported left metatarsalgia with loss of motion evolving since 3 weeks. One month previously, she had suffered from rhinopharyngitis. On examination, the temperature was 38.5°C. There was tenderness and swelling of the dorsal left foot. The erythrocyte sedimentation rate was at 31 mm and the C reactive protein was 20 mg/L. Plain radiographs revealed a metatarsal lytic lesion with important periosteal apposition (figure 1). MRI revealed the characteristic pattern of Brodie's abscess (figure 2). The patient was prescribed antibiotics (amoxicilline-clavulinic acid 1.5 g/day during 45 days) and foot immobilisation with good clinical response. The X-ray of the foot made 1 month later showed a full metaphyseal consolidation with sequestration ( figure 3).In this case, Brodie's abscess was difficult to diagnose because of its insidious onset, mild symptoms and especially atypical site. The skeletal lesion affects almost usually the metaphysis of long bones and involves the lower limbs. The predilection site is the femur and tibia. A little more than 15 cases of metatarsial osteomyelitis have been reported in the literature.1-3 In our case, the outcome was favourable under antibiotics. The abscess had disappeared without recurrence or fistulisation with a decline of 2 years.