RESUMO
We report a rare case of a primary intracranial B cell lymphoma originating in the internal auditory canal. The clinical manifestations were indistinguishable from those of other, more common tumors of the same region. We achieved total gross tumor removal with preservation of the facial nerve. A detailed histologic examination and a systemic workup confirmed the primary nature of this tumor. To our knowledge, this is the second case reported in the literature of a primary malignant lymphoma originating in the internal auditory canal. This is the first instance that includes immunohistochemical and cytometric studies of fresh tissue. We discuss the management of primary lymphomas of the central nervous system, with special emphasis on their association with acquired immunodeficiency syndrome and other immune system diseases. Awareness of primary central nervous system lymphomas is important, since a greater occurrence of these rare tumors in the cerebellopontine angle is probable in the future.
Assuntos
Meato Acústico Externo/patologia , Neoplasias da Orelha/patologia , Linfoma de Células B/patologia , Linfoma Difuso de Grandes Células B/patologia , Meato Acústico Externo/cirurgia , Neoplasias da Orelha/complicações , Neoplasias da Orelha/cirurgia , Feminino , Citometria de Fluxo , Perda Auditiva Neurossensorial/etiologia , Humanos , Imuno-Histoquímica , Linfoma de Células B/complicações , Linfoma de Células B/cirurgia , Linfoma Difuso de Grandes Células B/complicações , Linfoma Difuso de Grandes Células B/cirurgia , Pessoa de Meia-IdadeRESUMO
This paper reports findings in a pair of temporal bones from a patient with clinical evidence of Lermoyez's syndrome, a rare variant of Meniere's disease. Endolymphatic hydrops is limited to the basal turn of the cochlea and saccule in Lermoyez's syndrome, but more generalized in Meniere's disease.
Assuntos
Perda Auditiva Neurossensorial/patologia , Zumbido/patologia , Vertigem/patologia , Ducto Coclear/patologia , Edema/patologia , Saco Endolinfático/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Náusea , Sáculo e Utrículo/patologia , Síndrome , Osso Temporal/patologia , VômitoRESUMO
All surgical manipulations of the endolymphatic sac have a common requirement: to identify the intradural part. We studied the position of the intradural endolymphatic sac in relation to the posterior semicircular canal, the sigmoid sinus, the retrofacial air cell tract, and the jugular bulb in 50 temporal bones. The intradural sac was identifiable in 48 cases; in two the sac either was absent or would not have been identifiable surgically without jeopardizing other important structures, particularly the posterior semicircular canal.