there are two ways to fix this.

1> changing three lines of code to use an array

# ...snip...
   my @cases; # make this an array
# ...snip...
        foreach(@goods){
                if (s/$caseid//){
                        push @cases, $_; # add caseid to array
                }
        }

# ...snip...
        print h2('Cases'), "@cases"; # print the cases
# ...snip...
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-or-

2> changing one line of code to append to the string

# ...snip...
   my $cases; # keep this as an empty string
# ...snip...
        foreach(@goods){
                if (s/$caseid//){
                        $cases .= $_ . ' '; # append caseid to string
                }
        }

# ...snip...
        print h2('Cases'), $cases; # print the cases
# ...snip...
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~Particle ;Þ