The music and comedy venue now known as the Hammersmith Apollo originally opened in 1932 as the Gaumont Palace cinema.
It was designed in the Art Deco style by renowned theatre architect Robert Cromie - and is considered one of the UK's biggest and best-preserved Art Deco super cinemas.
More top news
Scotland Yard said two murder investigations have been launched following the separate incidents, which both happened in the past week.
Photos show the extraordinary surgical procedures to remove the growth.
The Met Police says 143 firearms have been handed in at stations across the capital in just seven days, including two antique machine guns.