I think you had meant solitary mastocytoma
(the correct terminology) but it means the same anyway. I am not sure of the location or the size. They can regress spontaneously and the one blood test
that would be very helpful to know his risk of anaphylaxis
is mast cell tryptase levels.
I am sure this test must have been done, as the diagnosis of mastocytoma is difficult, unless a bone biopsy was done that showed sheets of mast cells.
There is a theoretical risk of anaphylaxis in patients with mastocytosis
, but is more patients with systemic mastrocytosis. Having an emergency pack of antihistamines, prednisolone
, adrenaline injector (if possible) is the ideal management plan plus couselling on how to recognise anaphylaxis.
Insect bite stings do cause problems particularly bee and wasp (including hornet, red fire ants etc), so you have to ask him to be careful about these things.