Cranio-cervical conundrum; Enigmatic complete atlanto-occipital assimilation with Chairi I malformation

Q4 Medicine

Radiology Case Reports Pub Date : 2025-05-16 DOI:10.1016/j.radcr.2025.04.086

Khurram Khaliq Bhinder, Mariam Shah, Madiha Saeed Wahla, Nasir Khan, Amna Mehboob, Sabiyal Saghir, Alishbah Ziad

引用次数: 0

Abstract

Atlanto-occipital assimilation is extremely rare congenital anomaly, characterized by partial or complete fusion of atlas and occipital bone leading to altered cranio-cervical junction anatomy. In our patient, basilar invagination resulted in acute angulation and narrowing of foramen magnum. Crowding of structures at foramen magnum was seen with tonsillar herniation and compression of brain stem. Edema signal in proximal cervical cord was also seen. Bilateral atlanto-occipital assimilation with increased atlas to dens distance seen suggestive of atlanto-axial instability. Overall findings were suggestive of Chiari I malformation with atlanto-occipital assimilation.

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Cranio-cervical难题;神秘的完全寰枕同化伴Chairi畸形

寰枕融合是一种极为罕见的先天性异常，其特征是寰枕骨部分或完全融合，导致颅颈交界解剖结构改变。在我们的病人中，颅底内陷导致了枕骨大孔的急性成角和狭窄。枕骨大孔结构拥挤，扁桃体突出，脑干受压。近端颈髓也可见水肿信号。双侧寰枕同化伴寰椎到齿突距离增加提示寰枢椎不稳定。总体结果提示Chiari I型畸形伴寰枕同化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiology Case Reports Medicine-Radiology, Nuclear Medicine and Imaging

CiteScore

1.10

自引率

0.00%

发文量

1074

审稿时长

30 days

期刊介绍： The content of this journal is exclusively case reports that feature diagnostic imaging. Categories in which case reports can be placed include the musculoskeletal system, spine, central nervous system, head and neck, cardiovascular, chest, gastrointestinal, genitourinary, multisystem, pediatric, emergency, women''s imaging, oncologic, normal variants, medical devices, foreign bodies, interventional radiology, nuclear medicine, molecular imaging, ultrasonography, imaging artifacts, forensic, anthropological, and medical-legal. Articles must be well-documented and include a review of the appropriate literature.