title: [Unusual cause of orbital mass].
abstract: METHODS
  A 54-year-old female presented with a progressive swelling of the upper eyelid since 6 months. Magnetic resonance imaging (MRI) showed an extraconal supratemporal orbital lesion. After resection the histopathological diagnosis confirmed a Merkel cell carcinoma in the lacrimal gland.
  
  
  METHODS
  Due to an incomplete resection the patient underwent adjuvant radiochemotherapy and is relapse-free for 1.5 years.
  
  
  CONCLUSIONS
  Merkel cell carcinoma (MCC) is a rare neuroendocrine tumor, usually occurring on sun-exposed skin and in 10% in the region of the eyelids. The occurrence of MCC in the lacrimal gland is even less common with only two published cases.
authors: Klinik für Augenheilkunde, Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Deutschland, anne.ruebsam@charite.de.
authors: A
authors: A
authors: Rübsam
authors: K
authors: K
authors: Erb-Eigner
authors: P
authors: P
authors: Lohneis
authors: E
authors: E
authors: Bertelmann
mesh_terms: D015266:Carcinoma, Merkel Cell / Q000175:diagnosis* / Q000628:therapy*; D059186:Chemoradiotherapy, Adjuvant; D003937:Diagnosis, Differential; D005142:Eyelid Neoplasms / Q000175:diagnosis* / Q000628:therapy*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D035583:Rare Diseases / Q000175:diagnosis / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000628:therapy*; D016896:Treatment Outcome