Condroma adyacente al cavum de Meckel simulando un neurinoma del quinto par craneal. A propósito de un caso / Chondroma adjacent to Meckel's cave mimicking a fifth cranial nerve neurinoma. A case report

Los condromas craneales son tumores derivados de remanentes de células embrionarias condrocíticas que habitualmente aparecen en la sincondrosis de la base del cráneo. A diferencia del resto del organismo,donde los tumores condroides constituyen el tumor óseo primario más frecuente solo por detrás de los de estirpe hematopoyética, a nivel craneal constituyen una entidad poco frecuente con una incidencia de menos del 1% de los tumores intracraneales. Presentamos el caso de un varón de 42años remitido a nuestra consulta por el hallazgo de una lesión extraaxial situada en la región del cavum de Meckel y extensión a la fosa posterior con compresión del troncoencéfalo tras clínica de paraparesia de 6meses de evolución. Bajo el diagnóstico de un neurinoma del V par craneal se realiza una exéresis subtotal del tumor mediante un abordaje combinado supra-infratentorial presigmoideo. El resultado anatomopatológico postoperatorio confirma el diagnóstico de condroma craneal

Cranial chondromas are tumours arising from chondrocyte embryonic remnants cells that usually appear in the skull base synchondrosis. In contrast to the rest of the organism, where chondroid tumours are the most common primary bone tumour just behind the haematopoietic lineage ones, they are a rarity at cranial level, with an incidence of less than 1% of intracranial tumours. The case is reported on a 42 year-old male referred to our clinic due to the finding of an extra-axial lesion located close to the Meckel's cave region, with extension to the posterior fossa and brainstem compression after progressive paraparesis of 6 months onset. With the diagnosis of trigeminal schwannoma, a subtotal tumour resection was performed using a combined supra-infratentorial pre-sigmoidal approach. The postoperative histopathology report confirmed the diagnosis of cranial condroma

[Chondroma adjacent to Meckel's cave mimicking a fifth cranial nerve neurinoma. A case report]. / Condroma adyacente al cavum de Meckel simulando un neurinoma del quinto par craneal. A propósito de un caso.

Cranial chondromas are tumours arising from chondrocyte embryonic remnants cells that usually appear in the skull base synchondrosis. In contrast to the rest of the organism, where chondroid tumours are the most common primary bone tumour just behind the haematopoietic lineage ones, they are a rarity at cranial level, with an incidence of less than 1% of intracranial tumours. The case is reported on a 42 year-old male referred to our clinic due to the finding of an extra-axial lesion located close to the Meckel's cave region, with extension to the posterior fossa and brainstem compression after progressive paraparesis of 6 months onset. With the diagnosis of trigeminal schwannoma, a subtotal tumour resection was performed using a combined supra-infratentorial pre-sigmoidal approach. The postoperative histopathology report confirmed the diagnosis of cranial chondroma.

Herniación paradójica transtentorial, manifestación extrema del síndrome del craniectomizado. Caso clínico / Paradoxical transtentorial herniation, extreme trephined syndrome sign: A case report

El creciente auge actual del uso de la craniectomía descompresiva conlleva implícita la aparición de complicaciones derivadas de la alteración en la presión barométrica intracraneal y del equilibrio tanto hidrostático como hemodinámico. La herniación paradójica transtentorial («paradoxycal transtentorial herniation») representa una rara manifestación, englobada dentro del síndrome del craniectomizado, de extrema gravedad y de tratamiento relativamente simple. Presentamos el caso de una mujer de 56 años, sin antecedentes de interés, que tras ser intervenida de un meningioma del surco olfatorio presenta un hematoma en el lecho quirúrgico con abundante edema, requiriendo una segunda intervención de urgencia sobre este sin posibilidad de realizar la reposición ósea. Durante el posoperatorio se observa un gran deterioro neurológico de la paciente con el ortostatismo, que se resolvía espontáneamente con el decúbito y que se solventa con la reposición ósea posteriormente. Se analizan los posibles factores predisponentes y las posibles etiologías del cuadro

The current increasing use of decompressive craniectomy carries the implicit appearance of complications due to alterations in both intracranial pressure and in the hydrostatic-hemodynamic equilibrium. Paradoxical transtentorial herniation represents a rare manifestation, included in “trephine syndrome”, extremely critical but with relatively simple treatment. We present the case of a 56-year-old woman with no interesting medical history, who, after an olfactory groove meningioma surgery, presented a haemorrhage located in the surgical area with an important oedema. The patient required a second emergency surgery without any chance of conserving the cranial vault. During the post-operational period, great neurological deterioration in orthostatic position was noticed, which resolved spontaneously in decubitus. This deficit was resolved with bone replacement afterwards. We discuss possible predisposing factors and aetiologies of this pathology

[Paradoxical transtentorial herniation, extreme trephined syndrome sign: A case report]. / Herniación paradójica transtentorial, manifestación extrema del síndrome del craniectomizado. Caso clínico.

The current increasing use of decompressive craniectomy carries the implicit appearance of complications due to alterations in both intracranial pressure and in the hydrostatic-hemodynamic equilibrium. Paradoxical transtentorial herniation represents a rare manifestation, included in "trephine syndrome", extremely critical but with relatively simple treatment. We present the case of a 56-year-old woman with no interesting medical history, who, after an olfactory groove meningioma surgery, presented a haemorrhage located in the surgical area with an important oedema. The patient required a second emergency surgery without any chance of conserving the cranial vault. During the post-operational period, great neurological deterioration in orthostatic position was noticed, which resolved spontaneously in decubitus. This deficit was resolved with bone replacement afterwards. We discuss possible predisposing factors and aetiologies of this pathology.