Parameters Number of patients
Sites of synchronousmalignancies (n, % among all synchronousmalignancies) Oesophagus Lung Head and neck Other sites * 41 (73.2) 5 (8.9) 3 (5.4) 9 (15.5)
Sites of primary malignancies giving rise to synchronousmalignancies (n, % among total number of patients with the primary malignancy) Hypopharynx Oral cavity Larynx Oropharynx Paranasal sinuses and nasal cavity 30 (27.3) 14 (3.9) 8 (6.3) 4 (5.3) 1 (3)
Rate of synchronousoesophagealmalignancies (n, %) 41 (5.8)
Sites of primary malignancies giving rise to synchronousoesophagealmalignancies(n, % among total number of patients with the primary malignancy) Hypopharynx Oral cavity Larynx Oropharynx Paranasal sinuses and nasal cavity 25 (22.7) 8 (2.2) 4 (3.2) 4 (5.4) 0 (0)
Stages of synchronousprimary oesophagealmalignancies(n, %) Stage 1 Stage 2 Stage 3 Stage 4 22 (53.7) 4 (9.8) 10 (24.4) 5 (12.2)
Risk factors for synchronousoesophagealmalignancies(Odds ratio) Male gender Smoker status Drinker status Primary hypopharyngeal cancer 14.89 3.33 26.14 10.59