 fever, swollen lymph nodes, abdominal pain, and diarrhea), or, in extremely rare cases, to life-threatening anaphylaxis.In several of these cases, the mosquito bite allergy reaction occurred prior to the diagnosis of MCL suggesting that MBA can be a manifestation of early developing, and therefore a harbinger of mantle cell lymphoma.MCL, like most cancers, results from the acquisition of a combination of (non-inherited) genetic mutations in somatic cells.