1.Assessment of the anatomic variation of mandibular incisive canal in chin bone harvesting.
Ji Hyuck KIM ; Se Ho KIM ; Kwang Jun KWON ; Soung Min KIM ; Young Wook PARK
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2006;32(3):226-229
during bone harvesting from the chin.
Anatomic Variation*
;
Chin*
2.Anatomic Variants Mimicking Pathology on Echocardiography: Differential Diagnosis.
Journal of Cardiovascular Ultrasound 2013;21(3):103-112
Differentiation of normal from abnormal findings is critical in echocardiography. Anatomic variants occurring in normal cardiac developments often simulate pathologic entities. This review focuses on the differential diagnosis of normal anatomic structures from pathologic ones in echocardiography.
Anatomic Variation
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Diagnosis, Differential*
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Echocardiography*
3.Anatomic Variation of the Common Palmar Digital Nerves and Arteries.
Journal of Korean Neurosurgical Society 2015;57(3):219-220
Variations in the course and distribution of common palmar digital nerves and arteries are rare. A classic common palmar digital nerves and arteries are defined as concomitant. During routine dissection classes to undergraduate medical students we observed formation of each common palmar digital nerve divided into 2 or 3 branches and formed a ring enclosing the corresponding common palmar digital artery. Knowledge of the anatomical variations of the common palmar digital nerves and arteries is crucial for safe and successful hand surgery.
Anatomic Variation*
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Arteries*
;
Hand
;
Humans
;
Students, Medical
4.A Case of Giant Concha Bullosa Causing Complete Unilateral Obstruction of Nasal Cavity.
Jin Yong JANG ; Jung Ho HAN ; Do Hwe PARK ; Kwang Tae KIM
Korean Journal of Otolaryngology - Head and Neck Surgery 2009;52(4):369-372
The term concha bullosa describes aerated turbinate and it is most common on middle turbinate. Symptoms of concha bullosa depends on the amount of pneumatization and location. Concha bullosa without symptoms does not need surgical treatment, however, surgical treatment is indicated when it causes nasal obstruction. There are many reports of concha bullosa because it is a common anatomic variation. Despite many reports of concha bullosa, there is no definite statistics on the size of concha bullosa, and there has been no reports on what its largest size is. This report deals with a giant concha bullosa of middle trubinate of 4.5 cm in length, 2.2 cm in width size causing complete nasal obstruction.
Anatomic Variation
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Nasal Cavity
;
Nasal Obstruction
;
Turbinates
5.Spinal Enumeration by Morphologic Analysis of Spinal Variants: Comparison to Counting in a Cranial-To-Caudal Manner.
Sam YUN ; Sekyoung PARK ; Jung Gu PARK ; Jin Do HUH ; Young Gyung SHIN ; Jong Hyouk YUN
Korean Journal of Radiology 2018;19(6):1140-1146
OBJECTIVE: To compare the spinal enumeration methods that establish the first lumbar vertebra in patients with spinal variants. MATERIALS AND METHODS: Of the 1446 consecutive patients who had undergone computed tomography of the spine from March 2012 to July 2016, 100 patients (62 men, 38 women; mean age, 47.9 years; age range, 19–88 years) with spinal variants were included. Two radiologists (readers 1 and 2) established the first lumbar vertebra through morphologic analysis of the thoracolumbar junction, and labeled the vertebra by counting in a cranial-to-caudal manner. Inter-observer agreement was established. Additionally, reader 1 detected the 20th vertebra under the assumption that there are 12 thoracic vertebra, and then classified it as a thoracic vertebra, lumbar vertebra, or thoracolumbar transitional vertebra (TLTV), on the basis of morphologic analysis. RESULTS: The first lumbar vertebra, as established by morphologic analysis, was labeled by each reader as the 21st segment in 65.0% of the patients, as the 20th segment in 31.0%, and as the 19th segment in 4.0%. Inter-observer agreement between the two readers in determining the first lumbar vertebra, based on morphologic analysis, was nearly perfect (κ value: 1.00). The 20th vertebra was morphologically classified as a TLTV in 60.0% of the patients, as the first lumbar segment in 31.0%, as the second lumbar segment in 4.0%, and as a thoracic segment in 5.0%. CONCLUSION: The establishment of the first lumbar vertebra using morphologic characteristics of the thoracolumbar junction in patients with spinal variants was consistent with the morphologic traits of vertebral segmentation.
Anatomic Variation
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Female
;
Humans
;
Male
;
Spine
6.Panoramic radiographs underestimate extensions of the anterior loop and mandibular incisive canal.
Ana Caroline Ramos de BRITO ; Yuri NEJAIM ; Deborah Queiroz de FREITAS ; Christiano de OLIVEIRA SANTOS
Imaging Science in Dentistry 2016;46(3):159-165
PURPOSE: The purpose of this study was to detect the anterior loop of the mental nerve and the mandibular incisive canal in panoramic radiographs (PAN) and cone-beam computed tomography (CBCT) images, as well as to determine the anterior/mesial extension of these structures in panoramic and cross-sectional reconstructions using PAN and CBCT images. MATERIALS AND METHODS: Images (both PAN and CBCT) from 90 patients were evaluated by 2 independent observers. Detection of the anterior loop and the incisive canal were compared between PAN and CBCT. The anterior/mesial extension of these structures was compared between PAN and both cross-sectional and panoramic CBCT reconstructions. RESULTS: In CBCT, the anterior loop and the incisive canal were observed in 7.7% and 24.4% of the hemimandibles, respectively. In PAN, the anterior loop and the incisive canal were detected in 15% and 5.5% of cases, respectively. PAN presented more difficulties in the visualization of structures. The anterior/mesial extensions ranged from 0.0 mm to 19.0 mm on CBCT. PAN underestimated the measurements by approximately 2.0 mm. CONCLUSION: CBCT appears to be a more reliable imaging modality than PAN for preoperative workups of the anterior mandible. Individual variations in the anterior/mesial extensions of the anterior loop of the mental nerve and the mandibular incisive canal mean that is not prudent to rely on a general safe zone for implant placement or bone surgery in the interforaminal region.
Anatomic Variation
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Cone-Beam Computed Tomography
;
Humans
;
Mandible
;
Radiography, Panoramic
7.Absent portal vein bifurcation: a rare variant and its clinical significance.
Ranjan Kumar SAHOO ; Sitansu KUMAR PANDA ; Pravakar BAHINIPATI
Anatomy & Cell Biology 2014;47(3):210-213
Portal vein branching anomaly occurs due to aberration of normal anastomotic patterns and involution of vitelline veins during development of portal vein. Anatomical knowledge of portal vein and its branching pattern is important for hepatobiliary surgeon and gastrointestinal intervention radiologist. We are reporting a case of absence of portal vein bifurcation showing single main intrahepatic portal vein with gradual decreasing caliber distally, in a young female patient on contrast-enhanced computed tomography study of abdomen. Few cases of absence of portal bifurcation have been reported in literature so far.
Abdomen
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Anatomic Variation
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Female
;
Humans
;
Portal Vein*
;
Veins
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Vitellins
8.Three Cases of Rare Anatomic Variations of the Long Head of Biceps Brachii.
Sang Ho KWAK ; Seung Jun LEE ; Byung Wook SONG ; Min Soo LEE ; Kuen Tak SUH
Clinics in Shoulder and Elbow 2015;18(2):96-101
In general, the long head of the biceps brachii originates from the superior glenoid labrum and the supraglenoid tubercle, crosses the rotator cuff interval, and extends into the bicipital groove. However, rare anatomic variations of the origins of the long head have been reported in the past. In this report, we review the clinical history, radiologic findings, and arthroscopic identifications of 3 anatomic variants of the biceps tendon long head. As the detection of long head of biceps tendon pathology during preoperative radiologic assessment can be difficult without prior knowledge, surgeons should be aware of such possible anatomic variations.
Anatomic Variation
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Head*
;
Pathology
;
Rotator Cuff
;
Shoulder
;
Tendons
9.Anatomical Variation of the Lesser Saphenous Vein.
So Min HWANG ; Hao Ching PAN ; Hong Il KIM ; Yong Hui JUNG ; Hyung Do KIM
Archives of Reconstructive Microsurgery 2013;22(2):48-51
PURPOSE: The lessor saphenous vein is an anatomical index in various surgical methods involving an approach to the popliteal fossa. However, occasionally, there have been some cases where the surgical process was difficult because the lessor saphenous vein was not found in the popliteal fossa during the operation process. The aim of this study is to determine the frequency of the anatomical variation of lessor saphenous vein not found in the popliteal fossa with a review of the literature. MATERIALS AND METHODS: This study was conducted on 83 cases of selective neurectomy for hypertrophic calf performed in our clinic from March 1997 to June 2013. There were 42 patients, with a mean age of 32.8 years old. We confirmed the existence of the lessor saphenous vein in the popliteal fossa during the operation process. RESULTS: Among 83 cases during this study period, the lesser saphenous vein was not found in four cases. In one patient, no lesser saphenous vein was found on either side of the popliteal fossa, and in two patients, no lesser saphenous vein was found on the left side of the popliteal fossa. As a result, the frequency of variation was found to be 4.8%. CONCLUSION: Due to the anatomical variation of the lessor saphenous vein, it may not be found in the midline of the popliteal fossa. Based on the literature review, several possibilities for failure to observe the lesser saphenous vein could be suggested. If surgeons are well aware of these possibilities, the steadier operation could be performed.
Anatomic Variation
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Humans
;
Methods
;
Popliteal Vein
;
Saphenous Vein*
10.Anatomic Variations on PNS CT.
Young Uk LEE ; Jong Dae SUH ; Eun Kyung YOUN ; Dong Hyun KIM ; Kuk Jin LEE
Journal of the Korean Radiological Society 1994;31(3):431-438
PURPOSE: To illustrate frequently encountered anatomic variations on PNS computed tomography(CT) and to assess their clinical significance. MATERIALS AND METHODS: CT findings of 1523 patients, who underwent PNS CT with no history of sinus surgery, were reviewed, and prevalence of each anatomic variation and its relationship with mucociliary clearance pathway was evaluated. RESULTS: Two categories of anatomic variations were encountered. The first group included variations of the turbinates, such as concha bullosa(28.6% ), paradoxical middle turbinate(31.5%), of the uncinate process, such as medially bent or folded(36.3%), laterally bent(3.7%) or uncinate bulla(0.5%), of the ethmoidal sinus, such as Haller's ce11(28.2%), large agger nasi ce11(9.6%) or large ethmoidal bulla(23.5%) and nasal septal deviation(24. 1%), which might cause obstruction of mucociliary clearance pathway and thus give rise to secondary obstructive sinusitis. The second group included Onodi ce11(1.4%) and medial depression of the lamina papyracea (3.5%), which were not related with obstructive sinusitis. 87 cases of large agger nasi cell were associated with obstruction of nasofrontal recess. Large ethmoidal bulla(452 cases), Haller's ce11(245 cases) and true concha bullosa (25 cases) contributed to narrowing of the infundibulum. Medially bent uncinate process(220 cases), concha bullosa(157 cases), paradoxical middle turbinate(126 cases) and nasal septal deviation(93 cases) were observed in middle meatal obstruction and supreme concha (3 cases) accompanied sphenoethmoidal recess obstruction. CONCLUSION: Recognition of anatomic variations on PNS CT is important to build a treatment plan in patients with obstructive sinusitis as they may represent causes of the disease, and to avoid critical complications during functional endoscopic sinus surgery.
Anatomic Variation
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Depression
;
Humans
;
Mucociliary Clearance
;
Prevalence
;
Sinusitis
;
Turbinates