Surgical Treatment and Clinical Evaluation of Calvarial Metastases.

Background: The aim of this study is to explore surgical treatment techniques and clinical attributes associated with calvarial metastases, while providing a comprehensive review of the treatment experiences relevant to this particular type of tumor.

Methods: This study involves a retrospective analysis of clinical data from 12 patients diagnosed with calvarial metastatic tumors who underwent surgical intervention. Among these patients, 5 had a history of previous malignant tumor resections, while 7 presented with calvarial metastatic tumors as their initial symptom. In all cases, the surgical approach consisted of calvarial tumor resection followed by titanium mesh repair. Following the surgical intervention, all patients underwent a comprehensive course of treatment, encompassing both local radiotherapy and systemic chemotherapy.

Results: In 1 instance, a patient presented with multiple tumors located in the central area of the frontal bone and the right temporal bone. The larger tumor situated in the middle of the frontal bone was surgically excised, while the tumor in the right temporal bone was treated using radiotherapy. In 2 cases characterized by multiple metastases within the skull, a comprehensive excision of all tumors was accomplished in a single surgical procedure. In the remaining cases featuring a solitary metastatic growth, the respective tumors were surgically removed. There were 10 instances of dura mater invasion and 3 cases involving the invasion of brain tissue. Pathologic examinations revealed 1 case of metastatic lung adenocarcinoma, 1 case of metastatic paraganglioma, 1 case of metastatic hepatocellular carcinoma, 2 cases of metastatic thyroid carcinoma, and 7 cases of metastatic clear cell renal cell carcinoma. Throughout the follow-up period, spanning from 14 to 90 months, various outcomes were noted. These included three occurrences of in situ recurrence. In addition, 1 patient required 3 distinct surgical interventions, while 2 other patients underwent 2 separate surgical procedures each. Notably, 1 of these cases involved the exposure of the titanium mesh on the scalp, necessitating the removal of the titanium mesh. Regrettably, there have been 9 recorded fatalities among the patients, while 3 individuals have survived.

Conclusion: Solitary metastasis of calvarium region is rare, and surgical resection is effective. However, it is necessary to extend the resection range and combine with local radiotherapy to avoid local recurrence. Surgical intervention can significantly enhance the quality of life for affected patients. The prognosis of the patients mainly depends on the treatment of the primary disease and the situation of important organ dissemination and treatment.