Isolated clival metastasis: a rare presentation of renal cell carcinoma

Area of Science:

• Oncology
• Neurology
• Radiology

Background:

• Renal cell carcinoma (RCC) is a significant cause of adult malignancies, typically metastasizing to common sites like lymph nodes, lungs, bone, liver, and brain.
• Clival tumors can present with diverse symptoms, including cranial neuropathies, often necessitating a thorough diagnostic workup.
• Metastatic disease from renal primaries to the skull base is uncommon, making early diagnosis challenging.

Observation:

• A patient presented with holocranial headache and diplopia, indicative of potential neurological compromise.
• Cranial magnetic resonance imaging (MRI) revealed a clival-based lesion with associated bony erosion.
• Abdominal ultrasonography and contrast-enhanced computed tomography (CT) identified a left renal mass, suggesting a primary renal tumor.

Findings:

• The clival lesion was confirmed to be a metastasis from an otherwise occult renal cell carcinoma.
• The absence of other metastatic foci emphasized the unusual presentation of this advanced malignancy.
• The patient received radiotherapy for symptomatic management of the clival metastasis.

Implications:

• This case emphasizes the critical need to evaluate clival lesions presenting with cranial neuropathies for a potential renal primary tumor.
• It suggests that clinicians should maintain a high index of suspicion for uncommon metastatic patterns of renal cell carcinoma.
• Prompt diagnosis and management of such rare presentations can potentially improve patient outcomes and guide further therapeutic strategies.