[3] In this lineup, they recorded their early demo tapes Cadaveric Incubator of Endo-Parasites (1993), Symphonies for Pathologist (1994), and Analyse of Pathological Conceptions (1995).

This was followed a year later by three more split EPs: Forensic Clinicism – The Sanguine Article with Immured, Sick Sinus Syndrome with Mastic Scum, and Swarming of Virulency with Ingrowing.

In 1997, Marek "Švejk" Pavlík was hired to play drums, just as Bilos took over bass duties—leading to Richard Chrobok coming onboard as the band's guitarist.

Around this time, the theme of the band's lyrics changed from pathological topics to socially aware ones—opposing homophobia, inequality, racism, and slavery.

[4] Malignant Tumour went on to record the demo tape Killing for Profit in 1997 and the split EPs Rock Stars – Money Wars with Dead Infection and Murder for You to Eat with Vomito, in 1998.

In 2001, Bilos relocated from Czechia to the Netherlands, where an entirely new lineup was formed, including brothers Johan and Jelle Smits on drums and bass, respectively.

A year later, they issued the double split EP In Oil We Trust with Critical Madness, Szargyerek, and Anubis, as well as their first full-length album, Dawn of the New Age.

Earthshaker received praise from reviewers,[11][12] won Album of the Year at the 2010 Anděl Awards in the Hard & Heavy category,[13] and reached second place in the Břitva poll.

[citation needed] In early 2013, Malignant Tumour entered the studio once more to record their next album, Overdose & Overdrive, again with Andy Classen as producer.