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Biomedical subjects

A Fukamachi

Publications and source records attributed to A Fukamachi.

At least 37 records · Page 2Linked to original sources
PubMed1987

Venous cerebral infarctions in an infant with chronic subdural hematoma.

An infant with multiple cerebral infarctions and chronic subdural hematoma is reported. The infarctions were found after repeated tappings of the hematoma. Angiography did not demonstrate any occlusion of the main arteries. The infarctions were thought to be caused by thrombosis of the hanging cerebral veins. The pathogenesis and significance of the venous infarctions in an infantile subdural hematoma are discussed.

Brain Injuries↗
PubMed1987

Symmetrical bilateral low-density lesions in the areas of supply by Heubner's arteries after aneurysm surgery.

Three patients with symmetrical bilateral low-density areas which were the perfusion territories of Heubner's arteries are reported. The infarctions were demonstrated on computed tomography after aneurysm surgery. Two of them had an anterior communicating artery aneurysm and the other one had multiple aneurysms of both sides. They were operated upon in the acute stage after subarachnoid haemorrhage. As common factors, a thick and diffuse subarachnoid haemorrhage, an acute-stage operation, temporary clips to bilateral A1 segments or the internal carotid artery and a relatively low systemic blood pressure during operation were found. From these findings we conclude that the pathogenesis of the infarctions was due to occlusive changes affecting Heubner's arteries bilaterally.

Caudate Nucleus↗
PubMed1987

Postoperative subdural fluid collections in neurosurgery.

After introduction of computed tomography (CT) scanning, subdural fluid collections (SFCs) have been more frequently detected. We encountered 1013 operated cases in which CT scans were performed at an early postoperative stage. Postoperative SFC occurred in 165 of the 1013 operated cases (17%). The incidence of SFC was highest in aneurysm surgery (47%), followed by neurovascular decompression (27%) and brain tumor surgery (22%). In aneurysm surgery, preoperative ventricular dilatation seemed to promote the occurrence of SFC. In tumor surgery, SFC occurred more frequently when the tumor existed in the sellar region. The SFCs decreased or disappeared in most cases on sequential CT scans, but increased in 27 cases. In the latter, maximum thickness of the SFC was seen between 20 and 30 postoperative days. Nineteen of the 27 cases had preoperative ventricular dilatation. Operation for SFC was performed in four cases with clinical symptoms and signs. Three of 169 cases developed into chronic subdural hematomas.

Brain↗
PubMed1986

Postoperative extradural hematomas: computed tomographic survey of 1105 intracranial operations.

We reviewed the computed tomographic findings after 1055 intracranial operations to determine the incidence of postoperative extradural hematomas. There were 11 medium and 5 large hematomas after 1055 operations (1.0%). Ten of the 16 hematomas were operated upon (10/1055, 0.9%). Four of the 10 hematomas were seen after 278 brain tumor removals (1.4%), another four after 190 aneurysmal operations (2.1%), one after 14 intracerebral hematoma removals (7.1%), and the last one after 251 ventricular shunting or drainage procedures (0.4%). In 4 of the 10 operated hematomas, sites were regional, in five sites were adjacent, and in one the site was distant. All of the five adjacent hematomas extended downward from a lower rim of the operative locus. Causes were analyzed in the three types of the hematomas. In case of the regional hematomas, the causes were incomplete hemostasis of the dura mater or the bone in all four patients, nonperformance of central stay sutures in three, systemic hypertension in one, and hypofibrinogenemia in one. In the adjacent hematomas, we could find dural separation at an edge of craniotomy in all five patients, abrupt collapse of the brain in all, ventricular dilatation in two, and systemic hypertension during immediate postoperative period in two. In one distant hematoma, ventricular dilatation and ventricular shunting procedure were themselves thought to be the causal factors.

Adolescent↗
PubMed1986

Spontaneous resolution of chronic subdural hematomas.

Four patients with chronic subdural hematomas, all of which resolved spontaneously, were followed from the time of injury to resolution of the chronic subdural hematoma. Periodic computed tomographic (CT) scans showed spontaneous resolution 78, 174, 231, and 326 days after the development of the chronic subdural hematoma, respectively. Features of the CT scans and a possible mechanism of spontaneous resolution are discussed.

Adult↗
PubMed1985

The incidence and developmental process of delayed traumatic intracerebral haematomas.

Although delayed traumatic intracerebral haematomas (DTICH) have been frequently reported especially after the advent of computerized tomography (CT), the developmental processes of traumatic intracerebral haematomas and the incidence of DTICH have not been described precisely. Based on early sequential CT examinations of 84 intracerebral haematomas for which initial CT scans were performed as early as within 6 hours of injury, we could ascertain four types of the developmental processes: Type I (39%) included the haematomas which were already evident in the initial CT scans, Type II (11%) the haematomas which were small or medium initially and increased their sizes afterwards, Type III (24%) the haematomas of which admission CT scans could not demonstrate any changes at the sites of development of the haematomas, and Type IV (26%) the haematomas of which initial CT scans showed a salt and pepper or flecked high-density appearance. Types III and IV denoted the DTICH and accounted for 50% of all the haematomas. Therefore, DTICH are thought to be not as uncommon as previously reported. Aetiologies and changes in the concepts of the DTICH are discussed, and it is stressed that, in the cases with eventual extra- and intra-cerebral combined haematomas, any surgical treatment of an extracerebral haematoma plays an important role in the development of DTICH.

Adolescent↗
PubMed1985

Postoperative intracerebral hemorrhages: a survey of computed tomographic findings after 1074 intracranial operations.

We surveyed computed tomographic findings after 1074 intracranial operations to determine the incidence and etiology of postoperative intracerebral hemorrhages. Medium or large hemorrhages occurred after 42 operations (3.9%). Larger hemorrhages, hemorrhages in the suprasellar region, and hemorrhages associated with other types often preceded a poor outcome. Major etiologies underlying postoperative intracerebral hemorrhages were uncontrolled bleeding from a blind area, difficult dissection of a tumor from the brain, retraction injury, vessel injury from a needle, bleeding from a residual tumor, local hemodynamic changes after removal of a tumor, premature rupture of an aneurysm, and hypertensive putaminal hemorrhage. Hypertension during recovery from anesthesia was another important factor.

Adolescent↗
PubMed1985

Intracranial granuloma caused by Aspergillus fumigatus.

A case is reported of intracranial granuloma caused by Aspergillus fumigatus involving the anterior cranial fossa and the frontal lobe. In this case, clinical symptoms developed about 5 years before the diagnosis was made. The final diagnosis was made by a craniotomy. The patient was treated with an extensive excision and chemotherapy, but finally he failed to respond to these treatments. We compile a summary of reported cases with a tabulation of pertinent information and discuss the pathogenesis, prognosis, and difficulty in treating this infection.

Aspergillosis↗
PubMed1985

Immediate postoperative seizures: incidence and computed tomographic findings.

Convulsive seizures within 48 hours after intracranial operations using a craniotomy were reviewed. Incidence was 8.9% (44 of 493 operations): 13.5% of brain tumor operations and 3.8% of aneurysmal operations. We demonstrated that preoperative seizures, sites of lesion, sub-therapeutic anticonvulsant levels, and postoperative local organic lesions were important factors causing the immediate postoperative seizures. Among them, a survey of postoperative computed tomography scans disclosed nine intracerebral hemorrhages, eight cases of cerebral edema, and four cerebral infarctions in the 44 patients; such major complications had a significant correlation with postoperative seizures (p less than 0.005).

Adolescent↗
PubMed1985

The incidence of delayed traumatic intracerebral hematoma with extradural hemorrhages.

After introduction of computerized tomography (CT), we experienced 22 patients with traumatic extradural and intracerebral combined hematomas, of whom 15 underwent sequential CT scans. In 14 of the 22 patients or 13 of the 15 patients whose initial CT scans were performed early, within 6 hours after injury, intracerebral hematomas developed more slowly than extradural hematomas. In ten of the 13 patients, development of intracerebral hematomas was demonstrated only after removal of extradural hematomas, and in four patients acute brain swelling was observed during surgery. Therefore it is emphasized that the incidence of post-surgical intracerebral hematoma with extradural hemorrhages is high and that acute brain swelling during surgery for extradural hematomas is largely caused by the delayed intracerebral hematomas.

Adult↗
PubMed1985

Malignant melanoma of the spinal epidural space metastasized from the enucleated left eye after nine years without symptoms: report of a case.

A case of flaccid paraplegia due to a metastatic spinal epidural melanoma is reported. Symptoms occurred approximately 9 years after the enucleation of the left eye. A solid melanotic mass was removed almost totally. Three years after the operation, the patient had not regained the motility of the lower limbs. The need for long term follow-up and management of patients with such problems is discussed, and the pertinent literature is reviewed.

Choroid↗
PubMed1982

Giant serpentine aneurysm of the posterior cerebral artery.

We are reporting an unusual case of a giant serpentine aneurysm of the posterior cerebral artery (PCA). We were unable to find a report in the literature of a similar aneurysm. The microsurgical pterional approach was used for temporary clipping of the P-2 segment of the PCA, and the aneurysm was trapped successfully and excised. The discussion includes the operative approach to the giant serpentine aneurysm.

Cerebral Angiography↗