Lytic Bone Lesion of the Skull Vault as a Rare Presentation of Metachronous Metastasis from Kidney Carcinoma: A Case Report
Paolo La Montanara, Annamaria Albergo, Roberto Castellana, Roberto Castellana, Massimo Chiarappa, Oren Krimchansky, Giuseppina Renzulli, Annalisa Rossiello, Francesco Signorelli, Paola Verde, Domenico Sergio Zimatore, Giuseppe Vella
Researchers' Journal of Internal Medicine.
Background: We report a rare case of cranial vault metastasis from renal cell carcinoma occurring seven years after nephrectomy, with a late presentation and absence of symptoms. Osteolytic skull lesions are uncommon findings that are often incidental and are associated with a broad differential diagnosis, including both benign and malignant entities. This report reviews the features of metastases from renal cell carcinoma, with particular emphasis on the distinctive aspects of the present case, its radiological findings, and the associated clinical implications. Case Presentation: We report the computed tomography (CT), angiographic, MR findings, and histopathological confirmation of a metachronous clear cell renal cell carcinoma (ccRCC) metastasis presenting as a solitary osteolytic lesion of the occipital bone with extensive bone destruction. The patient, a 77-year-old female, had undergone left radical nephrectomy seven years prior and presented with progressive retronuchal swelling over three months without associated pain or other symptoms. The article discusses the radiological and clinical features specific to this case. Conclusions: Early recognition of bone lesions, including rare cranial vault metastases from renal tumors, enables prompt diagnosis and timely multidisciplinary management. Current guidelines support systemic therapy and, in selected cases, metastasectomy or stereotactic body radiotherapy (SBRT). Post-nephrectomy surveillance remains essential despite the rarity of late metastatic recurrence. Clinical context, including age and medical history, is key to accurate diagnosis and to guiding radiological interpretation. Early detection through vigilant follow-up is therefore crucial to optimize outcomes and quality of life.