How is it

SELECT * FROM gallery2 WHERE topic_id="45538" UNION SELECT * FROM gallery2 WHERE topic_id="917864" UNION SELECT * FROM gallery2 WHERE topic_id="598518" UNION SELECT * FROM gallery2 WHERE topic_id="458200" UNION SELECT * FROM gallery2 WHERE topic_id="955379" UNION SELECT * FROM gallery2 WHERE topic_id="1121885" UNION SELECT * FROM gallery2 WHERE topic_id="393773" UNION SELECT * FROM gallery2 WHERE topic_id="887251" UNION SELECT * FROM gallery2 WHERE topic_id="299634" UNION SELECT * FROM gallery2 WHERE topic_id="1741668" UNION SELECT * FROM gallery2 WHERE topic_id="1348714" UNION SELECT * FROM gallery2 WHERE topic_id="497752" UNION SELECT * FROM gallery2 WHERE topic_id="1528758" UNION SELECT * FROM gallery2 WHERE topic_id="51196" UNION SELECT * FROM gallery2 WHERE topic_id="1022559" UNION SELECT * FROM gallery2 WHERE topic_id="90932"