title: An infant with idiopathic orbital myositis poorly responsive to steroid therapy: a case report.
abstract: A 9-month-old girl developed subacute limited adduction of the left eye, presenting with blepharoptosis. An orbital magnetic resonance imaging (MRI) 2 months after the onset revealed swelling of the left lateral rectus muscle, with increased intensity on T2-weighted images with fat saturation, which was enhanced with gadolinium. She was diagnosed with idiopathic orbital myositis based on history, physical examination, and MRI findings. Swelling of the left lateral rectus muscle was partially reduced by pulse steroid therapy. This is the first reported case of an infant orbital pseudotumor with clinical and MRI findings consistent with subacute orbital myositis. We propose that a fibrotic change of the orbital muscle may occur during a subacute course and would be incompletely responsive to steroid therapy.
authors.affiliation: Department of Pediatrics, Graduate School of Medicine, Osaka City University, 1-4-3, Asahi-machi, Abeno-ku, Osaka 545-8585, Japan. hattorih@med.osaka-cu.ac.jp
authors.forename: Hideji
authors.initials: H
authors.lastname: Hattori
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ohnishi
authors.forename: Yukiko
authors.initials: Y
authors.lastname: Nakagawa
authors.forename: Misako
authors.initials: M
authors.lastname: Ikemiya
authors.forename: Kazumi
authors.initials: K
authors.lastname: Yamato
authors.forename: Osamu
authors.initials: O
authors.lastname: Matsuoka
authors.forename: Tsuranu
authors.initials: T
authors.lastname: Yokoyama
authors.forename: Tsunekazu
authors.initials: T
authors.lastname: Yamano
mesh_terms: D000893:Anti-Inflammatory Agents / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D016727:Orbital Pseudotumor / Q000188:drug therapy* / Q000473:pathology*; D011239:Prednisolone / Q000627:therapeutic use*
chemical_list: D000893:Anti-Inflammatory Agents; D011239:Prednisolone