Neurocutaneous melanosis with the Dandy-Walker malformation: one case report
10.3760/cma.j.issn.1006-7876.2012.01.005
- VernacularTitle:神经皮肤黑变病合并Dandy-Walker畸形一例
- Author:
Dandan WANG
;
Qiuping GUI
;
Shilun WANG
;
Jingxia HU
;
Zhong ZHENG
;
Hongyan HAN
;
Jing RUAN
;
Jiuluan LIN
;
Wenring ZHOU
- Publication Type:Journal Article
- Keywords:
Melanosis;
Neurocutaneous syndromes;
Dandy-walker syndrome
- From:
Chinese Journal of Neurology
2012;45(1):16-19
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo investigate the clinic and pathologic features of one patient diagnosed with neurocutaneous melanosis ( NCM ) by biopsy.MethodsA 21-year-old woman presented with a 2-month history of tinnitus,headache,vomiting and 1-month history of impaired vision.At birth,a massive nevus covering most of the posterior abdomen had been noted as well as the presence of multiple smaller lesions all over the body.Magnetic resonance imaging demonstrated a posterior fossa cyst compatible with the Dandy-Walker syndrome and extensive leptomeningeal enhancement. Surgery was performed to cystectomy and to obtain pathologic specimens from the leptomeninges. Biopsy and immunohistochemical study was performed.ResultsAt surgery,diffuse black pigmentation of the leptomeninges and the cyst was found.Under microscope,the cyst and leptomeninges were composed with melanocytes with variable pigmentation.Those cells positive for HMB45,MelanA,S100 and vimentin.Ki-67 positive cells ＜ 1％.The pathologic diagnosis wasleptomeningeal diffusemelanocytosis. Thepatientdied 2months after thesurgery.ConclusionsNCM is characterized by a focal or diffuse proliferation of melanin-producing cells in both the skin and the leptomeninges.NCM could be compatible with the Dandy-Walker syndrome.Definite diagnosis relies upon the histological data obtained by mean of biopsy.
