C avernous sinus syndrome (CSS) is a rare clinical entity which results in compression of the neurovascular structures in the cavernous sinus, potentially leading to headache, ophthalmoplegia, and neuropathy. The most common causes are tumor, trauma, inflammation, aneurysm, and infection. We report the case of an 82-year-old male with osseous-predominant metastatic prostate cancer who was admitted for intractable right-sided periorbital pain and diplopia. He also developed a headache with associated mild ptosis and weak cranial nerve (CN) VI function. He later developed complete right eye ptosis, complete CN VI paralysis, and palsies of CNs III and IV. Magnetic resonance imaging (MRI) of the sella turcica confirmed a distinct enhancing lesion in the cavernous sinus and he was diagnosed with CSS as a result of bony metastasis from his prostate cancer. He was started on high-dose steroids, and underwent directed radiation therapy. Bone metastasis is common with prostate cancer with predilection for more proximal structures such as the iliac bones and lumbar spine. Cases of CSS stemming from metastatic prostate cancer are rare. Thus, the development of CN palsy and ophthalmoplegia along with orbital pain should trigger a thorough investigation of the etiology of CSS which should include primary malignancies and metastasis from more distant structures such as the prostate.
KeywordsCavernous sinus syndrome, cranial nerve palsy, ophthalmoplegia, metastatic prostate cancer Disclosure: Brandon Kuiper, Aline Babikian, and Wilfred Delacruz have nothing to disclose in relation to this article. No funding was received for the publication of this article.Authorship: All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship of this manuscript, take responsibility for the integrity of the work as a whole, and have given final approval to the version to be published.Compliance with Ethical Guidelines: All procedures were followed in accordance with the responsible committee on human experimentation and with the Helsinki Declaration of 1975 and subsequent revisions and informed consent was received from the patient involved in this case report.Open Access: This article is published under the Creative Commons Attribution Noncommercial License, which permits any noncommercial use, distribution, adaptation, and reproduction provided the original author(s) and source are given appropriate credit. Cavernous sinus syndrome (CSS) is a rare clinical entity characterized by headache, ophthalmoplegia, and neuropathy due to compression of vascular and nerve bundles that course through a narrow anatomical region in the skull.1,2 Myriad conditions lead to this syndrome including bacterial or fungal infection, thrombus, aneurysm, pituitary enlargement due to tumor or apoplexy, and primary or metastatic cancers.1-3 Prostate cancer has predisposition for bone metastasis, and bone is the predominant site of metastasis; however, skull involvement is less common. Metastatic prostate cancer in the...