Spinal melanotic schwannomas.
نویسندگان
چکیده
1 MD, Department of Neurosurgery, Bom Jesus Hospital, Ponta Grossa PR, Brazil; 2 MD, Department of Neurosurgery, School of Medicine, University of São Paulo (USP), São Paulo SP, Brazil; 3 MD, Sample Laboratory, Bom Jesus Hospital, Ponta Grossa PR, Brazil; 4 MD, PhD Department of Neurosurgery, School of Medicine, USP, São Paulo SP, Brazil; 5 MD, PhD Full Professor, Department of Neurosurgery, School of Medicine, USP, São Paulo SP, Brazil. Correspondence: Leonardo C. Welling; Rua Tiradentes 976; 84010-190 Ponta Grossa PR Brasil; E-mail: [email protected] Conflict of interest: There is no conflict of interest to declare. Received 06 August 2011; Received in final form 01 September 201; Accepted 09 September 2011
منابع مشابه
Canine malignant melanotic schwannomas: a light and electron microscopic study of two cases.
Malignant, melanotic schwannoma of the spinal cord was diagnosed in two two-year-old dogs. The neoplastic spindle cells were arranged in a herringbone or storiform pattern; the intracytoplasmic melanin varied in amount in different areas of the two neoplasms. Ultrastructural features including cytoplasmic lamellar premelanosomes and melanosomes, rudimentary cell junctions, scattered pinocytotic...
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We present a case of an intramedullary melanotic schwannoma (IMS) of the thoracic spinal cord. To our knowledge, this is the seventh reported case of an IMS of the central nervous system. Schwannomas are benign nerve sheath tumors of neural crest origin composed entirely of well differentiated Schwann cells that typically occur in peripheral nerves. Both the intramedullary location and the mela...
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Melanotic Schwannoma (MS) is rarely seen and potentially malignant neoplasm that is categorized as a variant of Schwannoma. MS most frequently involves intracranial structures followed by posterior nerve roots in the spinal canal. Approximately 50% of the cases with MS have psammomatous calcifications and this type of MS is related to Carney complex with autosomal dominant inheritance. Most cas...
متن کاملLaparoscopic resection of a giant retroperitoneal melanotic schwannoma
Background Retroperitoneal schwannomas are extremely rare, as they account for only 3% of retroperitoneal tumors. Clinical symptoms are nonspecific and of late onset, meaning that these tumors are diagnosed at an advanced stage. Surgical resection is required for histological diagnosis and to prevent possible malignant transformation. Celioscopy offers numerous benefits, reducing postoperative ...
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A case of malignant melanotic schwannoma arising in the right upper lobe bronchus of a 27 year old man is presented. Tumours of this type most commonly occur in spinal nerve roots and are generally considered to be benign. The behaviour of those originating elsewhere is less predictable. As far as we are aware this is the first reported case affecting the respiratory tract.
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ورودعنوان ژورنال:
- Arquivos de neuro-psiquiatria
دوره 70 2 شماره
صفحات -
تاریخ انتشار 2012