PMC5734557_01
Preoperative MRI revealed solid mass keeping intensive contrast in the nasal part of superior orbital rim (arrows): (a) axial MRI without contrast and (b) axial MRI with contrast.
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Magnetic resonance imaging (MRI) revealed a well-circumscribed - 9 x 9 mm2 in size - solid mass keeping intensive contrast in the left frontobasal, subgaleal area (Figure 1(a) and (b)).
After tumour was removed completely, supraorbital nerve is seen (arrow).
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Additionally, because the inferomedial part of the mass abutted on the supraorbital neurovascular bundle, it was excised together with it and caused bleeding (Figure 2).
Haematoxylin and eosin staining revealed that bundle of uniform, spindle-shaped cells were arranged in whorls.
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There were no mitotic figures, nuclear pleomorphism and nuclear atypia (Figure 3).
Immunohistochemical staining showed the diffuse staining with SMA.
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Ki67 index was 1% (Figure 4).