A 27-year old lady presented with a 2-month history of headache, initially intermittent and subsequently progressing to persistent pain over theright parietal eminence. There was increase of pain while combing and towelling with an area of tenderness over the same site. Her examinationrevealed an exquisitely tender coin-shaped area over the right parietal eminence with a soft compressible swelling and an underlying bony defect.Her images [Figure 1] revealed a fairly well-defined lytic lesion destroying the inner and outer table of the right parietal bone, mildly expansile,extending to the lateral soft tissue of scalp and compressing the epidural space. Excision and curettage of the surrounding bony margins were doneand the patient was started on indomethacin. Her biopsy revealed features of eosinophilic granuloma [Figure 2]. She became symptom-free and isbeing closely followed up.
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