IntroducciónL os plasmocitomas constituyen neoplasias malignas de las células plasmáticas clonales. Pueden clasificarse en 3 diferentes subgrupos: mieloma múltiple (forma diseminada que interesa a la médula ósea) y 2 formas localizadas (plasmocitoma soliario intra y extramedular). La variante extramedular constituye la más infrecuente 1 .Se presentan tres pacientes con plasmocitoma solitario nasosinusal con invasión extensa a la base craneal anterior y media. Paciente 1Paciente femenina, blanca, de 57 años, con antecedentes de diabetes mellitus tipo II tratada con glibenclamida, con diplopia horizontal de 4 meses de evolución que posteriormente se tornó vertical. Al examen físico se constató una parálisis del VI nervio craneal derecho y una paresia de los nervios craneales III, IV y VI izquierdos. Se realizó una Tomografía Computarizada (TC) de cráneo simple y con administración de contraste en la cual se observó una lesión hiperdensa en la región selar que no se modificó durante la administración de
Malignant cranial base neoplasm constitutes a heterogeneous group of lesions with common seat in this localization. In the last years endonasal endoscopic approach has been more used. Methods: It was carried out a descriptive retrospective study of the database of the Service of Neurosurgery of "Hermanos Ameijeiras" Hospital between September 2009 and September 2015 with the objective of determining the results of endoscopic treatment to these lesions. Results: They were treated a total of 12 patients with wicked lesions of the cranial base inside. Six of them corresponded to anterior cranial base: 5 carcinomas (2 indiferenciate carcinoma, 2 carcinomas of scamous cells and 1 adenocarcinoma) and a metastases of renal carcinoma. Other six corresponded to cordoma (3 patients) andhematopoyetic neoplasm (2 plasmocitomas and 1 linfoma). The age average was of 51,1 years with a masculine-feminine relationship of 1,1:1. Conclusions: Surgical resection according to oncological principles can be used with endoscopic technics that in fact are associate with less morbility, better vision, betercompartiments access, nasolacrimal system and medial canthal tendon, absence of facial scar, craniectomy and brain retraction.
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