title: Atypical subgaleal haemangioma causing calvarial erosion: a case report.
abstract: BACKGROUND
  Infantile haemangiomas are the most common soft tissue tumours of infancy and childhood, with an incidence rate of 4-10 %. These lesions commonly present between 2 and 10 weeks after birth and characteristically involute around 8-10 years of age. Most lesions occurring in the scalp are managed conservatively, with surgery reserved for those with complications.
  
  
  METHODS
  A 5-year-old girl presented with a swelling over the left occiput noticed since birth, with a gradual increase in size and rapid progression since the last 1 year. She had undergone six sessions of intralesional steroids over the past 3 years. However, recent MRI and CT scans showed an increase in the swelling size with full-thickness erosion of the underlying calvarium without neuroparenchymal involvement. The patient underwent surgical excision of the lesion with an excellent outcome. Our literature review revealed only a single case of haemangioma which arose from the scalp and caused significant underlying calvarial erosion and intracranial extension.
  
  
  CONCLUSIONS
  We present a case of an atypical infantile haemangioma arising in the subgaleal plane causing full-thickness erosion of the underlying calvarium.
authors.affiliation: Department of Neurosurgery, T. N. Medical College and BYL Nair hospital, Mumbai Central, Mumbai, 400008, India. mshradha5@gmail.com.
authors.forename: Shradha
authors.initials: S
authors.lastname: Maheshwari
authors.affiliation: Department of Neurosurgery, T. N. Medical College and BYL Nair hospital, Mumbai Central, Mumbai, 400008, India.
authors.forename: Eham
authors.initials: E
authors.lastname: Arora
authors.affiliation: Department of Neurosurgery, T. N. Medical College and BYL Nair hospital, Mumbai Central, Mumbai, 400008, India.
authors.forename: Hemantkumar
authors.initials: H
authors.lastname: Savant
mesh_terms: D002675:Child, Preschool; D005260:Female; D006258:Head and Neck Neoplasms / Q000150:complications / Q000151:congenital / Q000473:pathology*; D006391:Hemangioma / Q000150:complications / Q000151:congenital / Q000473:pathology*; D006801:Humans; D012535:Scalp / Q000473:pathology*; D012878:Skin Neoplasms / Q000150:complications / Q000151:congenital / Q000473:pathology*; D012886:Skull / Q000473:pathology*
keywords: Calvarial erosion; Infantile haemangioma; Scalp haemangioma