Biomedical subjects

Shigeo Matsunaga

Publications and source records attributed to Shigeo Matsunaga.

4 recordsLinked to original sources

PubMed2006

Endodermal cyst ventral to the lower brain stem.

A 28-year-old woman presented with a rare case of endodermal cyst located ventral to the lower brain stem manifesting as recurrent aseptic meningitis. Computed tomography and magnetic resonance imaging demonstrated a cystic mass located ventral to the lower brain stem and extending from the prepontine to the upper cervical (C-2) cistern. The lesion was totally removed through a retrosigmoid craniotomy and C1-2 hemilaminectomy. Histological and immunohistochemical examination showed the cyst was derived from the endoderm. The histological diagnosis was endodermal cyst. Early diagnosis and surgical removal are important for patients with these cysts.

Adult↗

PubMed2004

Combined pre- and retrosigmoid approach for petroclival meningiomas with the aid of a rotatable head frame: peri-auricular three-quarter twist-rotation approach: technical note.

We used the combined subtemporal presigmoid and suboccipital retrosigmoid multidirectional approach with the aid of a rotatable head frame (periauricular three-quarter twist-rotation approach) in 20 cases of petroclival meningiomas. Patients were placed in the lateral decubitus (park-bench) position. The head is twisted, rotated, and positioned 30 degrees face down in the Sugita rotatable head frame. By rotating this head frame, a 30- to 60-degree face-down position can be obtained when the suboccipital retrosigmoid route is used. Alternatively, the straight lateral or slightly brow-up position is obtained when the subtemporal presigmoid route is used. This twist-rotation approach provides multiple trajectories through the petroclival region with minimal drilling of the petrous bone, fatigue of the surgeon, and retraction of the brain.

Journal Article↗

PubMed2004

Solitary neurocysticercosis case caused by Asian genotype of Taenia solium confirmed by mitochondrial DNA analysis.

A Japanese woman presenting with neurologic symptoms was presumptively diagnosed with neurocysticercosis based on imaging findings. Hooklets in the scolex of the resected lesion were not confirmed through histopathological observation. However, the illness was confirmed by mitochondrial DNA analysis to be a solitary neurocysticercosis case caused by the Asian genotype of Taenia solium.

Animals↗

PubMed2002

[A case of solitary neurocysticercosis of unknown transmission route].

We report a case of solitary neurocysticercosis of unknown transmission route. A 26-year-old male was taken to our hospital with a history of general convulsions. On admission, physical and neurological findings were normal. On the basis of neuroimaging (computed tomography scan and magnetic resonance imaging), initial diagnosis was brain abscess and the patient was treated with antibiotics. Two months later, the patient, at times, presented a loss of consciousness. The follow-up MRI revealed that the enhanced lesion became enlarged and perifocal edema became evident, so the patient was surgically treated. By histopathological examination, the lesion was diagnosed as a cysticercus. The immunoserologic assay gave a positive result for the disease. Postoperatively, the symptoms improved. Cerebral cysticercosis is the most common parasitic disease of the central nervous system, but rare in Japan. Therefore its diagnosis remains difficult, especially in the case of solitary cerebral cysticercosis, which has been reported only 7 times in Japan. The pathological examination or the immunoserologic assay should be taken into consideration to obtain definitive diagnosis of cerebral cysticercosis.

Adult↗