Cannizzo, ElisaSadowski, CraigBucci, Janessa J.Carulli, GiovanniSohani, AliyahFerry, JudithHochberg, EphraimKluk, Michael J.Dorn, Michelle E.Ackerman, Adam M.Longtine, Janina AnnPreffer, Frederic2011-05-032009Cannizzo, Elisa, Aliyah R. Sohani, Judith A. Ferry, Ephraim P. Hochberg, Michael J. Kluk, Michelle E. Dorn, Craig Sadowski, et al. 2009. Carcinoma and multiple lymphomas in one patient: Establishing the diagnoses and analyzing risk factors. Journal of Hematopathology 2(3): 163-170.1868-9256http://nrs.harvard.edu/urn-3:HUL.InstRepos:4881227Multiple malignancies may occur in the same patient, and a few reports describe cases with multiple hematologic and non-hematologic neoplasms. We report the case of a patient who showed the sequential occurrence of four different lymphoid neoplasms together with a squamous cell carcinoma of the lung. A 62-year-old man with adenopathy was admitted to the hospital, and lymph node biopsy was positive for low-grade follicular lymphoma. He achieved a partial remission with chemotherapy. Two years later, a PET-CT scan showed a left hilar mass in the lung; biopsy showed a squamous cell carcinoma. Simultaneously, he was diagnosed with diffuse large B cell lymphoma in a neck lymph node; after chemo- and radiotherapy, he achieved a complete response. A restaging PET-CT scan 2 years later revealed a retroperitoneal nodule, and biopsy again showed a low-grade follicular lymphoma, while a biopsy of a cutaneous scalp lesion showed a CD30-positive peripheral T cell lymphoma. After some months, a liver biopsy and a right cervical lymph node biopsy showed a CD30-positive peripheral T cell lymphoma consistent with anaplastic lymphoma kinase-negative anaplastic large cell lymphoma. Flow cytometry and cytogenetic and molecular genetic analysis performed at diagnosis and during the patient’s follow-up confirmed the presence of two clonally distinct B cell lymphomas, while the two T cell neoplasms were confirmed to be clonally related. We discuss the relationship between multiple neoplasms occurring in the same patient and the various possible risk factors involved in their development.en-USdiffuse large B cell lymphomafollicular lymphomaanaplastic large cell lymphomarisk factorsmultiple malignanciescytogeneticsJournal Article2011-05-0310.1007/s12308-009-0041-0