Intravascular metastatic melanoma of the vena saphena magna

Intravascular schwannoma: A review of a rare diagnosis

While schwannoma is one of the most common types of benign peripheral nerve tumors in adults, a very unique and specific variant of schwannoma, the intravascular variant, is exceedingly rare. There have only been three previously published cases of intravascular schwannomas. Here we describe a fourth case of an intravascular schwannoma in a 47-year-old man with an enlarging subcutaneous nodule on his posterior calf. This is the second case of an intravascular schwannoma contained within a vein. Also included is an overview of intravascular schwannomas, including a description and discussion of the histopathological diagnosis, differential diagnoses, and schwannoma variants.

Metastatic melanoma presenting as intravenous tumour thrombus

Tumour thrombus is a complication that occurs when a malignancy invades into the vasculature, occluding its lumen. Here, we present a rare case of melanoma tumour thrombus of the great saphenous vein of the left thigh, which was diagnosed on ¹⁸ F-fluorodeoxyglucose positron emission tomography/computed tomography and ultrasound-guided biopsy, and responded well to immunotherapy with pembrolizumab.