A case of cerebral amyloid angiopathy associated with granulomatous arteritis is presented with description of the microscopic, immunocytochemical and ultrastructural features. The amyloid proved to be of the AL-type, with failure to show reactivity with anti-AA, anti-prealbumin and anti-albumin. Antisera against SAP and IgG (AF) did show reactivity. Hence the immunologic characteristics of this amyloid differ from those of other known conditions and may therefore represent a new form of amyloid. The role of granulomatous arteritis in this case remains speculative.

A single case of symptomatic metastatic melanoma to the gallbladder, with roentgenographic findings of gallbladder disease, is presented. Review of the 12 previously reported cases of symptomatic metastatic biliary melanoma and of those reports of "primary" melanoma of the gallbladder reveals marked similarity between the two groups, with regard to relative size, pathologic description, number, and location of lesions. This, together with the finding of "junctional activity" in our case, leads us to believe that most if not all melanomas present in the gallbladder are metastatic deposits from a known, undetected, or regressed primary locus elsewhere. Surgical removal, even in the presence of disseminated disease, is a worthwhile palliative procedure.

Key Clinical Message CNS myelomatous involvement is a rare complication of multiple myeloma with dismal outcome. This disease's optimal treatment is unclear. Combined approach of systemic therapy, radiotherapy, and intrathecal injections chemotherapy should be considered and autologous stem cell transplant consolidation is offered to eligible patients. The role of Daratumumab in this disease deserves further evaluation.

Non-Hodgkin's lymphoma of the sinonasal tract is now recognized as an important cause of destructive midfacial lesions formally designated as idiopathic inflammatory processes, and commonly treated with local radiotherapy in a bid to halt the destructive process. However, left untreated, the natural history of this disease remains largely unknown. We report a case which demonstrates the slow and apparently indolent natural course that these lymphomas, if left untreated, may display, before finally evolving into overwhelming and fatal disease. We also take the opportunity to present a brief synopsis of the evolution of our understanding of this condition and to review the modern literature on it.