Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0022116 (ischemia)
 91,303 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

As isolated symptoms, vertigo, dizziness and imbalance are not regarded by neurologists as reflections of transient ischemia in the vertebrobasilar circulation. The purpose of this retrospective study was to demonstrate that these symptoms can and do occur in isolation. To this end, we analyzed the symptoms, stroke risk factors and diagnostic algorithms in 27 patients with a diagnosis of transient vertebrobasilar ischemia. None of the 27 patients included in the review complained of any associated neurologic symptoms. Against the reference standard of brain imaging, the site of the pathologic lesion was defined in the brainstem/cerebellum with the Torok monothermal caloric test, with a sensitivity greater than 86%. Vestibular decruitment and hyperactive caloric responses were of particular diagnostic value. Thus, we recommend that the neurologic dogma with regard to brainstem cerebellar ischemia be rethought.
Ear Nose Throat J 1998 Dec
PMID:Diagnosis of vertebrobasilar insufficiency: time to rethink established dogma? 987 36

The most common complications of cochlear implantation are flap necrosis, compressed or improperly placed electrodes, and facial nerve injury, paresis, or stimulation. We report on three recent complications experienced at our institution: 1) a flap ischemia and partial-thickness necrosis without infection or device exposure, 2) facial nerve stimulation, which was managed with a new programming technique, and 3) a postimplant cholesteatoma in a patient with chronic eustachian tube dysfunction that required reoperation and explanation. We discuss the pathophysiology, likely etiology, and recommendations for management of these complications.
Ear Nose Throat J 1999 Dec
PMID:Surgical complications of cochlear implantation: a report of three cases and their clinical features. 1062 55

Intranasal cocaine abuse can lead to destruction of the palate and perforation of the nasal septum. The pathophysiology of cocaine-induced midline destructive lesions is multifactorial and includes local ischemia secondary to vasoconstriction, chemical irritation from adulterants put in "cut" cocaine, and infection secondary to trauma, impaired mucociliary transport, and decreased humoral and cell-mediated immunity. Cocaine abuse should be suspected in patients with a palatal or septal perforation of unknown etiology.
Ear Nose Throat J 2002 Mar
PMID:Midline nasal and hard palate destruction in cocaine abusers and cocaine's role in rhinologic practice. 1191 63

Black esophagus is a rare, relatively newly described, and usually incidental finding. The differential diagnosis includes several disease states, including ischemia, which has been implicated in acute necrotizing esophagitis. Several theories have been proposed to explain its etiology.
Ear Nose Throat J 2003 Jun
PMID:Black esophagus. 1286 72

Methotrexate is a dihydrofolate reductase inhibitor with application both as a chemotherapeutic agent and as a disease-modifying antirheumatic drug. Although its ability to inhibit cellular proliferation is a desired effect in its role as an antineoplastic agent, this property may also hinder normal physiologic regeneration of the nasal epithelium. This effect may predispose patients to septal cartilage ischemia, necrosis and, eventually, perforation. We report 2 cases of septal perforations in the setting of prolonged methotrexate use and present a literature review. Patient 1 is an 8-year-old boy with juvenile rheumatoid arthritis managed with weekly methotrexate who developed a 4-mm septal perforation with an unremarkable biopsy. This was closed with a mucosal advancement flap without incident. Patient 2 is an 11-year-old boy with non-Hodgkin lymphoma treated with methotrexate. His examination was significant for a large perforation of the dorsocaudal septum. A biopsy was negative for malignancy in this patient. Repair has been deferred-initially for chemotherapy and currently for treatment relapse. We hypothesize that prolonged use of methotrexate alters the balance between physiologic desquamation and epithelial regeneration. This imbalance may promote septal ischemia and predispose patients to the development of septal perforations.
Ear Nose Throat J 2009 Aug
PMID:Potential predisposition for nasal septal perforation with methotrexate use: report of 2 cases and literature review. 1968 2

A patient presented with acute-onset, painless, unilateral enlargement of the tongue. Steroid treatment for angioedema was ineffective, and a biopsy of an apparent mass of the tongue base showed normal tissue. Subsequent magnetic resonance imaging showed enlargement, enhancement, asymmetric T2 hyperintensity of the left half of the tongue, and dissection of the left cervical internal carotid artery (ICA) at the skull base. Unilateral enlargement of the tongue due to acute neurogenic denervation may be the sole clinical presentation of a spontaneous arterial dissection at the skull base. The hypoglossal neuropathy resulted from compression by the pseudoaneurysmal ICA dilatation or ischemia from interruption of the vasa nervorum.
Ear Nose Throat J 2011 Sep
PMID:Unilateral macroglossia as sole presenting manifestation of internal carotid artery dissection. 2193 4

The aim of this study was to assess the classification accuracy of an e-Nose in detecting acute liver failure (ALF) in rats. Exhaled breath from 14 rats was repeatedly sampled by e-Nose (8 sensors) and an additional external CO2 sensor at three stages: healthy period; portacaval shunt; and during the development of ALF due to surgically induced complete liver ischemia. We performed principal component analysis (PCA) on the (grouped) sensor data in each stage and the classification accuracy of the first two principal components was assessed by the leave-one-out approach. In addition we performed gas chromatography-mass spectrometry (GC-MS) analysis of the exhaled breath from three rats. The first and second principal components from the PCA analysis of e-Nose data accounted for more than 95% variance in the data. Measurements in the ALF stage were contrasted with the measurements in the control stage. Leave-one-out validation showed classification accuracy of 96%. This accuracy was reached after 3h of ALF development, and was reached already after 2h when data of an external CO2 sensor were also included. GC-MS identified 2-butanol, 2-butanone, 2-pentanone and 1-propanol to be possibly elevated in the ALF stage. This is the first study to demonstrate that ALF in rats can be detected by e-Nose data analysis of the exhaled breath. Confirmation of these results in humans will be an important step forward in the non-invasive diagnosis of ALF.
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PMID:Exhaled breath analysis with electronic nose technology for detection of acute liver failure in rats. 2413 44

Neoplasms located in the parotid region, temporal bone, infratemporal fossa, and lateral skull base represent a challenge due to their difficult anatomic location and surrounding neurovascular structures. A variety of surgical approaches are appropriate to access this area, although several of them can place the auricular blood supply in danger. If the auricular blood supply is compromised, ischemia and, eventually, avascular necrosis of the auricle can occur. Auricular necrosis often can cause patients a delay in adjuvant radiation therapy and result in the need for additional reconstructive procedures. Therefore, it is imperative to identify risk factors associated with the development of this disabling complication. We conducted a retrospective review of 32 individuals undergoing treatment of benign and malignant lesions in the parotid gland, infratemporal fossa, and lateral skull base. To identify potential risk factors for auricular necrosis, the patients were analyzed based on the type of neoplasm (malignant or benign), risk factors affecting blood flow (diabetes mellitus, smoking history, prior radiation, prior surgery), body mass index, and the length of surgery. In our population examined, 3 instances of auricular necrosis occurred. None of the potential risk factors proved to be statistically significant (although malignant pathology approached significance at p = 0.07). Two of the patients required an auriculectomy with reconstruction. The third had multiple postoperative clinic visits for surgical debridement. Although no potential risk factors were statistically significant, surgeons should remain cognizant of the auricular blood supply while performing surgery via preauricular and postauricular approaches to this area.
Ear Nose Throat J 2017 Feb
PMID:Auricular complications in parotid, temporal bone, infratemporal fossa, and lateral skull base surgery. 2823 73

Acute airway obstruction caused by invasive laryngeal cancer can make surgeons reluctant to perform a high-risk tracheostomy, which is life-saving for such patients. In the setting of the current COVID19 pandemic, we present a case of severe transglottic stenosis due to stage IV laryngeal carcinoma, in which gaseous exchange was facilitated by venovenous (VV) extracorporeal membrane oxygenation prior to emergent tracheostomy. The VV technique can ensure adequate oxygenation and CO2 removal. Venovenous extracorporeal membrane oxygenation provided sufficient time for surgical planning and preparation. It reduced the formation of aerosol, lowered the risk associated with life-saving tracheostomy, and protected the patient from ischemia.
Ear Nose Throat J 2020 Jul 20
PMID:Case Report of Acute Airway Obstruction Caused by Transglottic Squamous Carcinoma (Stage IV) During the Coronavirus Pandemic Cured by ECMO-Assisted Tracheostomy. 3268 10