MATLAB: Determine if there are 3 consecutive rows and columns in a list of subscripts

%sMATLABmatrixvectors

I have a 28×2 matrix (see printout below) of subscript values (row, col) and I want to determine if there are 3 consecutive rows and then 3 connective columns coming stemming from a single reference point in the list of subscripts. From the example list below, the answer to this questions would be 'yes'. This is because the 3 consecutive rows are (44,13), (45,13), (46,13), and the 3 consecutive columns are (44,13), (44,14), (44,15). How would I execute this in matlab? I was thinking of using diff(A) to determine changes in subscript values but I am unsure exactly how. Sorry if this is confusing at all, wasn't sure how to explain my problem.
A =
      43    15
      44    13
      44    14
      44    15
      44    16
      45    12
      45    13
      45    14
      45    15
      45    16
      46    12
      46    13
      46    14
      46    15
      46    16
      47    12
      47    13
      47    14
      48    11
      48    12
      48    13
      49    11
      49    12
      49    13
      50    11
      50    12
      50    13

Best Answer

map=conv2(  accumarray(A,1), ones(3),'same');
any3x3 = any(map(:))>=9
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