Ankle and toe weakness caused by calcified ligamentum flavum cyst: A case report

BACKGROUND Ligamentum flavum cysts,which are most common in mobile junctional levels of the spine,can be a rare cause of spinal stenosis.There have been several case reports of ligamentum flavum cysts.However,there is yet to be a documented case report of a calcified ligamentum flavum cyst.Herein,we report the first case of a calcified ligamentum flavum cyst causing ankle and toe weakness.CASE SUMMARY A 66-year-old male visited our hospital complaining of claudication as well as thigh and calf pain in his left leg,all beginning two weeks prior.Physical examination revealed motor weakness of the left ankle dorsiflexion and great toe dorsiflexion.Lumbar spinal computed tomography scans showed spinal stenosis combined with a calcified mass at the left side of the L4-5 level.Magnetic reso-nance imaging showed dural sac compression caused by the calcified mass at the left ligamentum flavum of the L4-5 level.We performed decompressive laminectomy and excision of the calcified mass combined with posterior lumbar interbody fusion at the L4-5 level.Intra-operatively,we found a firm and nodule like mass originating from the ventral surface of ligamentum flavum.Pathological examination suggested a calcified pseudocyst without a capsular lining.After the operation,the patient’s motor weakness in the ankle and great toe improved gradually.CONCLUSION The patient’s ankle and great toe weakness were improved successfully after surgical removal of the calcified cyst.

Calcifying Odontogenic Cyst of the Oral Cavity: A Clinical Case and Current Updates on the Ethiopathogenesis

Background: The calcifying odontogenic cyst (COC) is a rare pathological entity. It falls into a group of lesions with calcifications that present benign and sometime malignant tumor variants. Case Presentation: In the present study, we report on a case of intraosseous/intrasinusal COC with impacted maxillary canine and dentinoid structures odontoma-like. The clinical, radiographical, histopathological, and molecular characteristics of this pathological entity are discussed in relation also to the problems of differential diagnosis, treatment, and prognosis. Conclusion: The true COC is a rare entity in the oral cavity and represents about less than 1% of all odontogenic lesions. Careful clinical, instrumental and histological analysis must be performed for odontogenic cysts in order to accomplish the correct surgical act and to avoid recurrence.