absract intracranial invasion of cellular blue nevus (cbn) from the skin is extremely rare and such a condition with malignant transformation is even rarer. a case of meningeal melanoma with malignant transformation which was derived from an ota nevus is presented in this report. a21-year-old man with a neurocutaneous syndrome since childhood was referred with headache and mild left hemiparesia...

Meningeal carcinomatosis occurs in 1-18% of patients with solid tumours, most commonly carcinomas of the breast and lung or melanomas. There are relatively few reports of meningeal carcinomatosis in transitional cell carcinoma of the bladder. Isolated meningeal recurrence is particularly uncommon, and we present an unusual case of this in a 58-year-old man. The case was further complicated by t...

SUMMARY Melanocytes are pigment producing cells derived from the neural crest. They are primarily found in the skin and hair follicles, but can also be found in other tissues including the eye, ear and heart. Here, we describe the distribution of pigmented cells in C57BL/6J mouse meninges, the membranes that envelope the brain. These cells contain melanosomes of all four stages of development a...

Background: Melanocytic tumors of the central nervous system (CNS) such as meningeal melanoma are exceedingly rare tumours derived from leptomeningeal melanocytes. Primary melanomas account for 0.1% intracranial neoplasms with an incidence approximately 0.5 per 10 million. Methods: We report case a previously healthy 47 year old male who presented bilateral tonic-clonic seizure. Magnetic resona...

  Absract   Intracranial invasion of cellular blue nevus (CBN) from the skin is extremely rare   and such a condition with malignant transformation is even rarer. A case of   meningeal melanoma with malignant transformation which was derived from an Ota   nevus is presented in this report.   A21-year-old man with a neurocutaneous syndrome since childhood was referred   with headache and mild le...

A 68-year-old woman with progressive paraparesis and altered sensation lasting approximately five days was admitted to our clinic. Magnetic resonance imaging (MRI) revealed an advanced stage T7-8 epidural mass ventral to the spinal cord, which was believed to be a metastatic tumor considering the patient's age. A highly enhanced epidural mass and pedicle appeared during the MR scan. However, th...

The distribution of S-100 proteins was examined in 98 pediatric brain neoplasms with rabbit antiserum to S-100 protein, utilizing the peroxidase-antiperoxidase (PAP) immunohistochemical technique. Positive cytoplasmic immunoreactivity was present in 22 of 24 astrocytomas, both oligodendrogliomas, eight of 13 ependymomas, all 11 choroid plexus tumors, all nine schwannomas, two of six meningiomas...

intracranial hemangiopericytomas (hpc) are rare vascular tumors. they account for 0.4% of primary central nervous system tumors. hpc is more commonly located supratentorially and tends to occur in a younger age group, with average age at presentation of 38–42 years. the tumor was found throughout the entire cns, usually superficially and closely related to the meninges. moreover, they have a st...

abstract meningeal melanocytoma is a primary melanocytic neoplasm with certain mr and immunohistochemical characteristics worthy to note. in a 38-year-old man with a complaint of headache for a couple of years and recently added nausea, vomiting, diplopia, progressive visual blurring and hearing loss, magnetic resonance imaging (mri) was remarkable for t1 shortening of leptomeninges and certain...

Purpose. To illustrate the propensity of meningeal hemangiopericytoma to spread extraneurally, as a distinction to the ordinary meningioma.Patients or subjects. A patient with long history of meningeal hemangiopericytoma was reported.Methods. A case report on meningeal hemangiopericytoma with a literature review was presented.Results. The patient has multiple local recurrence as well as distant...