Table 1.

Clinically reported cases of neoplasms in patients with vaping history.

Type of study	Year	Author	Patient age (year)	Patient sex	Clinical presentation	Pathological diagnosis	Risk factors (arranged in chronological order)
Neoplasms in the oral cavity
Case report	2017	Nguyen et al.26	66	Male	Several exophytic masses with surrounding hyperkeratotic areas at the tongue	Basaloid squamous cell carcinoma	E-cigarettes: 20 times per day for 13 years
Case report	2017	Nguyen et al.26	59	Male	A non-healing ulceration at the lower lip	Basaloid squamous cell carcinoma	E-cigarettes: daily for 13 years (uncertain quantity of daily use)
Case report	2021	Klawinski et al.24	19	Male	A non-healing ulceration at the left lateral border of the tongue	Poorly differentiated invasive squamous cell carcinoma	Conventional cigarettes: 0.5 pack per day for 1 year E-cigarettes: daily for 4 years (uncertain quantity of daily use)
Neoplasms in other human organs rather than the oral cavity
Case report	2020	Shields et al.29	22	Male	Painless unilateral blurred vision (right eye)	Conjunctival intraepithelial neoplasia (CIN) with high-grade features	E-cigarettes: 5 vapes or more per day for 5 years
Case report	2022	Ballenberger et al.32	33	Male	A consolidative right lung opacity with multiple hypodense hepatic lesions with chest pain and fever	Thoracic NUT-midline carcinoma (poorly differentiated carcinoma with squamous and neuroendocrine features)	Conventional cigarettes: 20 packs per year for unknown duration E-cigarettes: for 1 year (uncertain quantity of daily use and frequency)