Browsing by Author "Hakan, Tayfun"

Now showing 1 - 6 of 6

Citation Count: 0
Addendum to Spinal Schwannomatosis: Case Report of a Rare Condition
(Turkish Neurosurgical Soc, 2017) Hakan, Tayfun; Celikoglu, Erhan; Aker, Fugen; Barisik, Nagehan
[No Abstract Available]
Citation Count: 0
Epidural Capillary Hemangioma of the Thoracic Spine
(Georg Thieme verlag Kg, 2016) Hakan, Tayfun
[No Abstract Available]
Citation Count: 17
The Histological Effects of Ozone Therapy on Sciatic Nerve Crush Injury in Rats
(Elsevier Science inc, 2017) Somay, Hakan; Emon, Selin Tural; Uslu, Serap; Orakdogen, Metin; Meric, Zeynep Cingu; Ince, Umit; Hakan, Tayfun
OBJECTIVE: Peripheral nerve injury is a common, important problem that lacks a definitive, effective treatment. It can cause neurologic deficits ranging from paresthesia to paralysis. This study evaluated the effect of ozone therapy on sciatic nerve crush injury in rats. MATERIALS AND METHODS: Twenty-four male rats were divided into control sham surgery, sciatic nerve injury, and sciatic nerve injury with ozone groups (each n = 8). The sciatic nerve injury was inflicted via De Koning's crush-force method. The sciatic nerve injury group received medical air and the sciatic nerve injury ozone group received 0.7 mg/kg ozone. Sciatic nerve samples were obtained 4 weeks after injury. Vascular congestion, vacuolization, edema formation, S100 expression, and the thicknesses of the perineurium and endoneurium and diameter of the injured sciatic nerves were evaluated. RESULTS: The diameter of the sciatic nerve and thicknesses of the perineurium and epineurium were significantly greater in the sciatic nerve injury group (P < 0.05) and significantly less in the sciatic nerve injury with ozone group (P < 0.001). High S100 immunoreactivity was seen in the sciatic nerve injury group compared with the other 2 groups (P < 0.05). The distributions of vascular congestion and vacuolization were significantly less in the sciatic nerve injury with ozone group (P < 0.05). CONCLUSIONS: Ozone therapy improved sciatic nerve injury recovery without causing an increase in fibrotic tissue. Ozone reduced fibrosis, vascular congestion, vacuolization, and edema in rodents. Ozone treatment might be used to assist in sciatic nerve injury.
Citation Count: 2
Median Nerve Injury from the Eye of an Artist: Gladiators
(Turkish Neurosurgical Soc, 2019) Hakan, Tayfun
Artists use their work to help us understand the universe. With their creations, we can rest our souls, find some solutions to problems, and even explore new dimensions. A 19th-century artist, Gerome, has depicted a gesture used to ask for mercy as a benediction sign in two of his works of art dealing with gladiatorial fighting. A warrior defeated in a gladiator combat is well known to ask for mercy with the extended index finger and fist. A benediction gesture by a gladiator after combat could be due to an acute nerve injury. At the sources that inspired the artist, the mercy gesture may have evolved into the benediction sign for an unknown reason. It is probable that a warrior cannot accurately form the mercy gesture following a peripheral nerve injury during combat. While his index finger was extended, the other fingers could not flex in the strict sense of making a fist due to traumatic median nerve injury.
Citation Count: 0
Traumatic Pseudoaneurysms of the Head in War Time: Report of Two Unusual Cases
(Turkish Neurosurgical Soc, 2018) Hakan, Tayfun; Kaur, Ahmet Cemil
Intracranial or extracranial pseudoaneurysms due to penetrating head injuries with gunshot are very rare entities. As the pseudoaneurysms of the superficial temporal artery usually present with a pulsating mass lesion beneath the scalp, intracranial pseudoaneurysms are manifested with symptoms including decreased conscious level, seizure, or focal neurological deficits. Here, two patients with combat-related pseudoaneurysms are reported. One was in the distal cortical branch of the anterior cerebral artery and one was in the superficial temporal artery. Both of the cases were victims of the Libyan war. One was admitted with a swelling in his scalp and a pseudoaneurysm on the parietal branch of the superficial temporal artery was diagnosed with computed tomography; and the other was incidentally diagnosed on the distal cortical branch of the anterior cerebral artery during an operation for removal of an intracranial bullet. Both of the aneurysms were treated with surgical excision without any complication.
Citation Count: 12
Vascular Variations Associated with Intracranial Aneurysms
(Turkish Neurosurgical Soc, 2017) Orakdogen, Metin; Tural Emon, Selin; Somay, Hakan; Engin, Taner; Is, Merih; Hakan, Tayfun
AIM: To investigate the vascular variations in patients with intracranial aneurysm in circle of Willis. MATERIAL AND METHODS: We used the data on 128 consecutive intracranial aneurysm cases. Cerebral angiography images were analyzed retrospectively. Arteries were grouped as anterior cerebral arterial system (ACS), posterior cerebral arterial system (PCS) and middle cerebral arterial system (MCS) for grouping vascular variations. Lateralization, being single/multiple, gender; and also any connection with accompanying aneurysms" number, localization, dimension, whether bleeding/incidental aneurysm has been inspected. RESULTS: Variations were demonstrated in 57.8% of the cases. The most common variation was A1 variation (34.4%). The rate of variations was 36.7%, 24.2% and 10.2% respectively in ACS, PCS and MCS. MCS variations were significantly higher in males. Anterior communicating artery (ACoA) aneurysm observance rates were significantly higher and posterior communicating artery (PCoA) aneurysm and middle cerebral artery (MCA) aneurysm observance rates were significantly lower when compared to "no ACS variation detected" cases. In "PCS variation detected" cases, PCoA aneurysm observance rates and coexistence of multiple variations were significantly higher. CONCLUSION: The rate of vascular variations in patients with aneurysms was 57.8%. Arterial hypoplasia and aplasia were the most common variations. ACS was the most common region that variations were located in; they were mostly detected on the right side. Coexistence of ACoA aneurysm was higher than PCoA and MCA aneurysms. In the PCS variations group, PCoA aneurysms were the most common aneurysms that accompanying the variation and multiple variations were more common than in the other two groups. The variations in MCS were most common in males.