title: A rare adrenal incidentaloma: adrenal schwannoma.
abstract: Adrenal schwannoma is an extremely uncommon cause of incidentaloma. It originates from neural sheath Schwann cells of the adrenal gland. We report the case of a left adrenal schwannoma incidentally discovered in a 32-year-old woman during examination of bloated feeling and stomach ache. The patient was incidentally found to have a left adrenal mass of 9 cm on abdominal ultrasonography. Computed tomography (CT) of the abdomen and [(18)F] fluorodeoxyglucose positron emission tomography (PET) were also performed. Metabolic evaluation was unremarkable. Due to the large size of the tumor, left adrenalectomy was performed. The postoperative course was uneventful. Histological examination established the diagnosis of schwannoma. This diagnosis was supported by immunohistochemistry of S-100 and vimentin positivity. In conclusion, adrenal schwannoma is an extremely rare entity and can grow considerably in size. The present case report emphasizes that clinicians should be aware of the possibility of retroperitoneal schwannoma. Total excision of benign schwannoma is associated with a favorable outcome. To our knowledge, there are case reports of schwannoma with CT and magnetic resonance imaging findings in the literature, although this is the first schwannoma case with PET-CT imaging.
authors.affiliation: Department of Endocrinology, Okmeydani Training and Research Hospital, Istanbul, Turkey.
authors.forename: Mine
authors.initials: M
authors.lastname: Adas
authors.affiliation: Department of Nuclear Medicine, Okmeydani Training and Research Hospital, Istanbul, Turkey.
authors.forename: Filiz
authors.initials: F
authors.lastname: Ozulker
authors.affiliation: Department of General Surgery, Bakirkoy Sadi Konuk Training and Research Hospital, Istanbul, Turkey.
authors.forename: Gokhan
authors.initials: G
authors.lastname: Adas
authors.affiliation: Department of General Surgery, Bakirkoy Sadi Konuk Training and Research Hospital, Istanbul, Turkey.
authors.forename: Bora
authors.initials: B
authors.lastname: Koc
authors.affiliation: Department of Nuclear Medicine, Okmeydani Training and Research Hospital, Istanbul, Turkey.
authors.forename: Tamer
authors.initials: T
authors.lastname: Ozulker
authors.affiliation: Department of Pathology, Okmeydani Training and Research Hospital, Istanbul, Turkey.
authors.forename: Ilknur Mansuroglu
authors.initials: IM
authors.lastname: Sahin
keywords: Adrenalectomy; Incidentaloma; Positron emission tomography-computed tomography; Schwannoma