Zaher K Otrock 1, Jad Saab, Georges Aftimos, Fady Nasr, Fadi S Farhat, Saad Khairallah, Gérard Abadjian, Marwan Ghosn, Hassan Sidani, Ahmad Ibrahim, Ayman Tawil, Claude Ghorra, Zarouhie Meguerian, Walid Mokaddem, Walid Dayeh, Ziad Salem, Georges Chahine, Nizar Bitar, Anas Mugharbel, Joseph Makdessi, Christina Khater, Mirna El Hajj, Dany Abi Gerges, Charles Sfeir, Joseph Kattan, Khaled Ibrahim, Michel Saade, Hussein Sadek, Rami A Mahfouz, Mohamed A Kharfan-Dabaja, Ghazi Zaatari, Ali Bazarbachi
1Department of Pathology and Laboratory Medicine, American University of Beirut Medical Center, Beirut, Lebanon.
Incidence of various Hodgkin (HL) and non-Hodgkin lymphoma (NHL) subtypes and association with viruses in Lebanon are not known. We undertook a nationwide study of 272 patients diagnosed with lymphoma in 2007. HL comprised 32.7 % (n = 89) of cases while NHL represented 67.3 % (n = 183). Consistent with the literature, nodular sclerosis was the most predominant HL subtype (n = 57/89). Among NHL, B-cell NHL represented 88 % (n = 161/183), T-cell NHL 9 % (n = 17/183), whereas in 2.7 % it was not classifiable. The B-cell NHL comprised predominantly diffuse large B-cell lymphoma (46 %) and follicular lymphoma (23 %). 81 cases were reviewed by a panel of pathologists with 87.6 % concordance rate. Serology was negative for hepatitis C in 122 tested cases. HIV was positive in 2 cases. Two adult T-cell leukemia/lymphoma were HTLV-I positive. EBV IgG were positive in 88.5 % of cases. 38 EBV seropositive cases [27 NHL (24 B-cell, 3 T-cell) and 11 HL] were studied for EBV genome expression using EBV-encoded RNA (EBER)-in situ hybridization. EBER expression was positive in 8 (21 %) cases (6 HL, 2 T-cell NHL). The distribution of lymphoma subtypes in Lebanon appears similar to that of Western countries. The high rate of EBV positivity in HL and T-cell lymphoma by EBER deserves further investigation.