case_images: PMC3758710_01
case_images: Magnetic resonance imaging scan showing hyperintense cystic lesion
case_images: JLP-5-60-g001.jpg
case_images: PMC3758710_01_JLP-5-60-g001.jpg
case_images: F1
case_images: On magnetic resonance imaging, a well-defined, oval shaped, hyperintense cystic lesion, of 6.6 x 4.8 cm in anterolateral compartment of arm was noted [Figure 1].
case_images: Cut surface of the tumor showing cystic degeneration
case_images: JLP-5-60-g002.jpg
case_images: PMC3758710_01_JLP-5-60-g002.jpg
case_images: F2
case_images: Cut section revealed uniloculated cyst filled with gelatinous material and the inner lining of the wall was smooth [Figure 2].
case_images: Section showing hypocellular and hypercellular area (H and E, x400)
case_images: JLP-5-60-g003.jpg
case_images: PMC3758710_01_JLP-5-60-g003.jpg
case_images: F3
case_images: Hypercellular areas show spindle shaped cells having wavy nuclei arranged in fascicles with focal palisading of nuclei [Figure 3].
case_images: Histological findings showing sheets of foamy macrophages (H and E, x400)
case_images: JLP-5-60-g004.jpg
case_images: PMC3758710_01_JLP-5-60-g004.jpg
case_images: F4
case_images: Hypocellular areas showed large number of foamy macrophages and loose myxoid stroma [Figure 4].
case_images: Immunohistochemistry pictures showing cytoplasmic S-100 positivity (IHC, S-100, x100)
case_images: JLP-5-60-g005.jpg
case_images: PMC3758710_01_JLP-5-60-g005.jpg
case_images: F5
case_images: On IHC tumor cells showed diffuse cytoplasmic positivity for S-100 protein [Figure 5] and was negative for KI67 [Figure 6]; confirming the diagnosis of schwannoma.
case_images: Immunohistochemistry (IHC) showing KI67 negativity (IHC, KI67, x100)
case_images: JLP-5-60-g006.jpg
case_images: PMC3758710_01_JLP-5-60-g006.jpg
case_images: F6
case_images: On IHC tumor cells showed diffuse cytoplasmic positivity for S-100 protein [Figure 5] and was negative for KI67 [Figure 6]; confirming the diagnosis of schwannoma.