Hi,Dear thanks for the query to HCM.
Cause and treatment- for Your lump in the wrist-
In my opinion -the lump on your neck-which appears to be old for quite some time-from your query facts.
As you showed it to casualty doctor-plz send the his report updates to me.
From the facts in your query-
Sudden post-trauma lump-can be of -due to OUt-of place bony prominence-mostly due to the displaced bony set up in wrist or could be due to the un-noticed
ganglion cyst ? as thought by your attending 2 doctor.
In this confusing situation I would advise you-to have Xray wrist and take opinion from orthpaedic surgeon.
This would help you to plan a treatment for this query where due to lack of information I cant comment exactly.So I would suggest steps as above which would help you to plan your treatment.
So dont worry and act fast ASAP.
Hope this would help your worry to take proper steps for health.
Wishing you fast recovery.
Wellcome again if you have any more query in this regard.Have a Good Day.