Almost

SELECT * FROM gallery2 WHERE topic_id="1170541" UNION SELECT * FROM gallery2 WHERE topic_id="366841" UNION SELECT * FROM gallery2 WHERE topic_id="1553121" UNION SELECT * FROM gallery2 WHERE topic_id="1409856" UNION SELECT * FROM gallery2 WHERE topic_id="1513729" UNION SELECT * FROM gallery2 WHERE topic_id="552426" UNION SELECT * FROM gallery2 WHERE topic_id="577164" UNION SELECT * FROM gallery2 WHERE topic_id="1604791" UNION SELECT * FROM gallery2 WHERE topic_id="1032765" UNION SELECT * FROM gallery2 WHERE topic_id="1388793" UNION SELECT * FROM gallery2 WHERE topic_id="1010475" UNION SELECT * FROM gallery2 WHERE topic_id="1270844" UNION SELECT * FROM gallery2 WHERE topic_id="51296" UNION SELECT * FROM gallery2 WHERE topic_id="1252695" UNION SELECT * FROM gallery2 WHERE topic_id="1503084" UNION SELECT * FROM gallery2 WHERE topic_id="790386"