Browsing by Author "Comert, Ali Danyal"

Now showing 1 - 3 of 3

Morphologic Evaluation of the Coccyx in the Pediatric Population
(Springer France, 2025) Meylani, Nevzat; Ten, Baris; Temel, Gulhan; Yuksek, Hasan Husnu; Comert, Ali Danyal; Beger, Burhan; Beger, Orhan
Purpose This computed tomography study aimed to display the alteration in the coccyx morphology (its ossification process, dimension and angulation) in children with advancing age. Methods Pelvic radiologic scans of 180 children aged 1-18 years were retrospectively evaluated to observe changes in the coccyx morphology with age, and to measure the linear length (LL), curvilinear length (CLL), sacrococcygeal angle (SCA), and intercoccygeal angle (ICA). Results The present study divides the postnatal evolution of the coccyx into three phases as follows: (a) in the first stage when the coccyx is of the shortest, it is completely cartilage until the age of 2 (infancy period) and its first segment begins to ossify by the age of 3 (early childhood period), (b) in the second stage when the coccyx is of medium size, its first segment is completely ossified by the age of 6 (late childhood period) and the ossification of its all segments is completed from the age of 11 (prepubescent period), and (c) in the third stage when the coccyx is of the longest, it reaches to adult size (postpubescent period). Linear functions were calculated as y = 15.647 + 1.145 x age (p < 0.001, R-2 = 0.561) for LL, and as y = 16.829 + 1.243 x age (p < 0.001, R2 = 0.559) for CLL. Conclusion Considering that morphological features of the coccyx, such as ICA, can be used in the diagnosis of coccydynia, our dataset may facilitate the identification of children with suspected coccydynia.
Prevalence, Size and Location of the Accessory Spleen in Children
(SpringerNature, 2025) Ten, Baris; Beger, Orhan; Comert, Ali Danyal; Beger, Burhan
ObjectiveThe study was planned to evaluate the size, shape and prevalence of the accessory spleen (AS) in healthy children aged 1-18 years using their abdominopelvic computed tomography images.MethodsPediatric subjects, who underwent abdominopelvic radiologic scan and admitted to the hospital between January 2011-December 2020 were included into the study for the detection of AS incidence. The antero-posterior, medio-lateral and supero-inferior diameters of AS and spleen were measured. In addition, the shape and localization of AS were noted.ResultsThe study population consisted of 3738 normal pediatric subjects (2320 males and 1418 females) aged 1-18 years. AS was found in 461 (12.3%) of this population. In addition, 92 (19.7%) out of 461 cases had more than one AS. Of the subjects with AS, 292 were male and 169 were female. The dispersion ratio of AS incidence in males and females proved that AS incidence did not correlate with sex (p = 0.291). Measurements in males were statistically similar to those in females, excepts from the supero-inferior diameter of the spleen (p = 0.036), which was greater in males than females. According to age groups, AS size did not change after early childhood period, but the size of the spleen increased up to postpubescent period. The most common location of AS was the middle third of the main spleen (23.9%). There were two different shapes of AS: 80% were round and 20% were ovoid.ConclusionApproximately one in eight children has an AS, which is round and well-marginated mass. It reaches adult size in late childhood period (i.e., from the age of six). Approximately one in four ASs was located at the middle third of the spleen.
Radiologic Anatomy of Pediatric Cervicothoracic Junction for Pedicle Screw Surgery
(SpringerNature, 2025) Yaman, Zafer Kaan; Ten, Baris; Temel, Gulhan; Yuksek, Hasan Husnu; Comert, Ali Danyal; Beger, Burhan; Beger, Orhan
Purpose To demonstrate age-dependent changes in dimensions of C6-T3 vertebrae in children for pedicle screw surgery. Methods Radiologic images of 180 pediatric subjects aged 1-18 years were evaluated retrospectively. Results In all vertebrae (C6-T3) at the cervicothoracic junction, the pedicle thickness (p < 0.001), pedicle axis length (p < 0.001), pedicle height (p < 0.001), spinal canal's transverse diameter (p < 0.001), spinal canal's sagittal diameter (p < 0.001) and interpedicular distance (p < 0.001) increased with advancing pediatric age (from one year to 18 years), but the transverse and sagittal pedicle angles decreased (p < 0.001). From C6 to T3, the pedicle axis length (p < 0.001) and sagittal pedicle angle (p < 0.001) increased proportionally, but the spinal canal's transverse diameter (p < 0.001) and transverse pedicle angle (p < 0.001) decreased proportionally. The pedicle height (p < 0.001) decreased from C6 to C7, but then increased until T3. The interpedicular distance (p < 0.001) increased from C6 to C7, but then decreased until T3. The pedicle thickness (p < 0.001) increased from C6 to T1, and then decreased up to T3. The spinal canal's sagittal diameter (p < 0.001) was statistically similar in C6 and C7, but then increased up to T2. Conclusion Our morphometric data regarding vertebral pedicle anatomy located at the cervicothoracic junction may be beneficial for surgeons to form a region-specific clinical strategy in children.