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Garland triad

Dr Frank Gaillard et al.

Garland's triad (also known as the 1-2-3 sign) is a lymph node enlargement pattern which has been described in sarcoidosis.

It comprises of:

right paratracheal nodes
right hilar nodes
left hilar nodes

Involvement of right paratracheal nodes is not 'magical' but rather reflects the ease with which these nodes are identified on plain radiography. Left paratracheal and aorto-pulmonary nodes are also frequently enlarged, but harder to identify ¹.