Eyelid Schwannoma in a Korean Woman

Schwannoma of the eyelid. A case report

The case is presented of a 57 year-old man with a one-year history of enlargement of the left upper eyelid. An excisional biopsy was performed, and the histological and immunohistochemical study confirmed the diagnosis of schwannoma. Schwannomas are benign peripheral nerve sheath tumours, derived from a Schwann cells proliferation. Eyelid involvement is extremely uncommon. To make the diagnosis, a detailed histopathological and immunohistochemical study is essential. This case suggests that schwannomas should be included within the differential diagnosis of any solid eyelid lesion.

Isolated eyelid Schwannoma: A rare differential diagnosis of lid tumor

Primary Schwannomas of the eyelid are extremely uncommon. It accounts for one percent of orbital tumors. We present a case of isolated eyelid Schwannoma in the lateral canthus of the left eye with no systemic diseases associated. Surgical excisional biopsy was done. In two years follow up, no recurrence or malignant conversion was detected.

Peripheral Nerve Sheath Tumors of the Eyelid Dermis: A Clinicopathologic and Immunohistochemical Analysis

PURPOSE

To determine the incidences, clinical features, and detailed histopathologic and immunohistochemical findings of 10 peripheral nerve tumors (isolated neurofibromas, solitary circumscribed neuromas [SCNs], and schwannomas) localized to the eyelid dermis.

METHODS

In this retrospective clinicopathologic study, clinical records and paraffin sections subjected to hematoxylin and eosin, Masson trichrome, periodic acid-Schiff, reticulin, and Alcian blue staining were critically reviewed from each case. Additional paraffin sections were immunoreacted for S100, neurofilament, CD34, epithelial membrane antigen (EMA), glucose transporter-1 (glut-1), and calretinin.

RESULTS

Ten patients with a median age of 57 years had solitary, small, flesh-colored papules, 70% at the eyelid margin. Microscopically, they were diagnosed either as a SCN or an isolated neurofibroma. SCN was diffusely S100-positive (and sometimes diffusely calretinin-positive) with myriad neurofilaments. Fascicles of cells were separated by CD34-positive septa, and the lesions were surrounded by a glut-1/EMA-positive capsule. Neurofibromas were calretinin-negative and had a moderate number of S100-positive cells, with widely scattered neurofilaments, many CD34-postive intermixed cells, and no capsule. No schwannomas were diagnosed.

CONCLUSIONS

Peripheral nerve tumors of the eyelid have a distinct clinical presentation at the eyelid margin. Careful histopathologic and immunohistochemical studies can reliably separate the entities in the categories of isolated neurofibroma, SCN, and schwannoma when the last occurs. These distinctions can have important systemic implications.

Schwannoma of upper eyelid: A rare differential diagnosis of eyelid swellings

Schwannoma is a relatively rare benign tumour of peripheral nerve origin. The occurrence of Schwannoma in eyelid is extremely rare. As per our knowledge, only 11 such cases have been reported in the literature so far. We present a case of a 40-year-old man who presented to us with a 2-year history of slowly enlarging, painless mass in his left upper lid with resultant progressive ptosis. Ocular examination was suggestive of a firm, non-tender nodule of size 2 × 1.5 × 1 cm on the left upper lid. The mass was non-adherent to the skin or the underlying tissue. The eyelid skin and conjunctiva were indurated and signs of inflammation were present. The lateral part of eyelid showed presence of an ulcer and the lid function was severely hampered. Provisional clinical diagnosis was that of an eyelid malignancy. With this in mind, the medial part of the lid was excised and reconstructed using a tarso-conjunctival flap from the lower eyelid in conjunction with a skin graft. The histopathology and immunohistochemistry established the diagnosis of Schwannoma. We recommend that Schwannoma be considered in the differential diagnosis of well-circumscribed eyelid swellings.

Schwannoma of the eyelid: apropos of two cases

Schwannoma, also referred to as neurilemmoma, is a benign tumor of peripheral nerve arising from Schwann cells that form the neural sheath. Schwannoma of ophthalmic interest is rare although it has been reported in relation with the orbit, and less frequently with the uveal tract and conjunctiva. Isolated eyelid schwannoma is extremely uncommon. Up until now, only eight cases have been reported in literature. Herein, we report two cases of eyelid schwannoma.