Surgical management of a rare giant ovarian serous cystadenoma with distinctive clinical manifestations.

Giant ovarian cysts are categorized with sizes >10 cm. After reaching huge diameters, these rare tumors cause clinical symptoms such as nausea, vomiting or abdominal pain. We present a 29-year-old woman with a giant unique cystadenoma represented with unusual clinical features like low back pain and progressive constipation.

The stage of head and neck diagnosed malignancies in COVID-19 outbreak versus before outbreak: A retrospective study.

Background: Global COVID-19 pandemic has affected cancer care systems. Recent studies show that the number of cases diagnosed with cancer has drastically decreased compared to the same period before the pandemic. Therefore, we are confronted with delayed diagnosis of critical cancers.

Cu(I) stabilizing crosslinked polyethyleneimine.

Polyethyleneimine (PEI) is known for its metal-coordinating properties and in its crosslinked form has applications in different areas ranging from drug delivery to waste water treatment and recovery of trace metals. With the aim to regulate the coordination environment of Cu(I) and Cu(II) ions in marine coatings, we have prepared a triazole cross-linking agent with 'soft' coordination that can crosslink PEI via indirect reductive amination. We have shown that this triazole crosslinker not only increases the Cu(II) absorption capacity of the crosslinked PEI in comparison to the traditionally used glutaraldehyde-crosslinked PEI (PEI-GA), but also allows the crosslinked polymer network to stabilize the Cu(I) oxidation state more effectively.