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Biomedical subjects

M Hemmati

Publications and source records attributed to M Hemmati.

At least 19 recordsLinked to original sources
PubMed1993

Temporal meningiomas presenting as chronic otitis media.

Two cases of temporal bone meningiomas presenting as chronic drainage ears are presented. One case was indicated by computer tomographic scan at the time of initial surgery to be limited to the middle ear, but recurred 9 months later with extensive cerebellopontine angle extension and cranial nerve palsies. The tumor in the second case extended from the middle ear to the cavernous sinus, with extensive intradural involvement. Meningiomas involving the middle ear must be considered to have intracranial extension, and magnetic resonance is the imaging study of choice.

Diagnosis, Differential↗
PubMed1992

Somatosensory evoked potentials in the evaluation of lumbosacral radiculopathy.

We performed lower extremity somatosensory evoked potential (SEP) studies in 59 patients with signs or symptoms suggestive of lumbosacral radiculopathy and compared them with results of myelography with post-myelogram CT (myelogram/CT), MRI, and other electrodiagnostic studies. Of 38 patients with abnormal myelogram/CTs, 32 had abnormal SEPs, while 11 demonstrated EMG abnormalities. All 21 patients with normal myelogram/CTs had normal SEPs. SEP improved electrodiagnostic sensitivity in patients with weakness or reflex changes as well as in those with sensory deficits only. SEP was less sensitive in patients in whom spinal stenosis was the only radiographic finding. MRI generally corresponded well with the results of myelogram/CT and SEP but overestimated the significance of disk bulges in some patients. SEP is useful in the electrodiagnostic evaluation of lumbosacral radiculopathy, particularly when EMG is nondiagnostic.

Back Pain↗
PubMed1989

Synchronous occurrence of parathyroid carcinoma and adenoma in an elderly woman.

The simultaneous occurrence of parathyroid carcinoma and other pathologic conditions of the parathyroid on a sporadic basis is extremely rare. Parathyroid exploration in an otherwise healthy 78-year-old woman with no underlying risk factors revealed synchronous right upper parathyroid adenoma and left upper parathyroid carcinoma. The patient's modest hypercalcemia (11.5 to 12.3 mg/dl) was seemingly at variance with remarkable parathormone elevations of 30 to 70 times normal.

Adenocarcinoma↗
PubMed1984

Intracerebral hemorrhage secondary to cerebral amyloid angiopathy.

Cerebral amyloid angiopathy (CAA) is a cause of intracerebral hemorrhage in a significant proportion of normotensive patients. Two cases of pathologically proved multiple intracerebral hemorrhages due to CAA are reported. These hemorrhages are accurately demonstrated on computed tomography and are typically superficial in location. CAA should be considered as a cause of such hemorrhages in elderly patients who are often normotensive and demented.

Aged↗
PubMed1984

Caudate hemorrhage.

We studied 12 patients with intracerebral hemorrhage in the head of the caudate nucleus. These cases accounted for 7% of a consecutive series of intracerebral hemorrhage. The clinical findings differed from more common varieties of supratentorial hemorrhage. All patients had acute onset of vomiting, headache, stiff neck, decreased level of consciousness, and behavioral changes in a pattern that simulated subarachnoid hemorrhage. Seven patients had gaze paresis and hemiparesis, with or without sensory loss. Two of these seven patients had, in addition, elements of Horner's syndrome. The prognosis for recovery was good. No patient had recurrent hemorrhage or persistent hydrocephalus.

Adult↗
PubMed1981

Calcified pseudocyst of the pancreas.

Pancreatic pseudocysts are encapsulated collections of fluid which may complicate trauma or inflammation of the pancreas. The correct preoperative diagnosis of the pseudocyst can be established easily by the modern techniques of ultrasonography or computed tomography (1-3). However, recognition of the lesion on plain radiographs of the abdomen is rarely possible because the wall and content of pancreatic pseudocysts do not show a visually perceptible difference in density from the adjacent soft tissues (4). This report concerns an exceptional instance whereby a pancreatic pseudocyst was clearly demarcated by virtue of radiographically detectable calcium deposits in its wall.

Calcinosis↗
PubMed1981

Giant serpentine intracranial aneurysm.

Giant serpentine aneurysms are considered a distinct subgroup of giant aneurysms because of their characteristic angiographic appearance and clinical behavior. A case of this unusual vascular abnormality showing progressive enlargement documented by computed tomography and cerebral angiography is presented, along with a review of the literature. Etiology, pertinent radiological findings, and a probable mechanism of serpentine channel formation are discussed.

Adult↗
PubMed1978

Computed tomography in isodense subdural hematoma.

Isodense subdural hematomas, particularly bilateral ones, may be difficult to diagnose with CT. Forty-three cases of subdural hematomas were studied by CT, 7 of which were isodense collections. Obliteration or displacement of the cortical sulci in the zone of the extracerebral collection was present in all 7 cases. Infusion scans demonstrated displacement of a cortical vein away from the inner table of the skull in 3 of the 7 cases. This findins is helpful in accurately predicting the size of the extracerebral collection.

Aged↗
PubMed1977

Spinal cord compression by vertebral hemangioma.

Asymptomatic vertebral hemangiomas occur frequently in adults but the discovery of a similar lesion in the pediatric are group is uncommon. A case which involves all the neural arch components with resultant spinal cord compression is rare and is reported with a review of pertinent literature.

Child↗