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Parasellar xanthogranulomas. | LitMetric

AI Article Synopsis

Article Abstract

Object: Xanthogranulomas are rare inflammatory masses most often found in the skin and eye. The incidence of intracranial xanthogranulomas is 1.6%-7%, with those found in the sellar and parasellar region being exceedingly rare and their etiology controversial. Sellar and parasellar xanthogranulomas are rarely reported in the western hemisphere, and their incidence in Western countries is unknown.

Methods: A prospectively acquired database of all endonasal endoscopic transsphenoidal surgeries performed at Weill Cornell Medical College was queried. Patients with histologically confirmed xanthogranulomas who were diagnosed and treated between 2003 and 2013 were included in the study. Patient history, demographic data, histological findings, and surgical approach were also evaluated.

Results: A total of 643 endonasal endoscopic procedures had been performed at the time of this study. Four patients (0.6%) were identified as having a histologically confirmed xanthogranuloma of the parasellar region, compared with an incidence of 6.7% for craniopharyngioma (CP) and 2% for Rathke cleft cyst (RCC). The most common symptom was visual loss, followed by headache. Preoperative diagnosis was CP in all cases. All patients underwent extended endonasal endoscopic transsphenoidal surgery with gross-total resection. Two patients developed panhypopituitarism after surgery. There were no CSF leaks. The mean follow-up was 61 months, at which time there were no recurrences. The key histological features differentiating xanthogranulomas from CPs were accumulation of foamy macrophages, multinucleated foreign body giant cells, cholesterol clefts, and hemosiderin deposits without stratified squamous epithelium. These histological features appear commonly as part of the spectrum of a secondary inflammatory response in an RCC.

Conclusions: Parasellar xanthogranulomas most closely approximate CPs clinically but pathological evidence may suggest an RCC origin. Gross-total resection can be achieved through extended endonasal endoscopic transsphenoidal approaches, and is curative.

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Source
http://dx.doi.org/10.3171/2014.12.JNS14542DOI Listing

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