Multiple primary cancers in a single individual are rare when more tha
n three distinct lesions are considered. This article reports a patien
t who developed four separate primary cancers: squamous cell carcinoma
of the larynx, squamous carcinoma of the lung, adenocarcinoma of the
breast, and adenocarcinoma of the colon. No specific hereditary syndro
me could be identified from this patient's pedigree. Individuals with
a history of multiple cancers should have a complete family history ev
aluation and follow-up for development of subsequent primaries.