title: Histologic Distribution of Pulmonary Tumors in Lebanon: A 5-Year Single Institution Experience.
abstract: BACKGROUND
  To compare the current histologic distribution of lung cancer in Lebanon to the worldwide trends, according to the 2004 WHO Classification.
  
  
  METHODS
  1,760 patients with a pulmonary pathology examination at Hotel-Dieu de France University Hospital between July 2009 and July 2014 were included.
  
  
  RESULTS
  Some 676 out of the total investigated patients (38.4%) had a lung tumor. In 665 (98.4%) the tumors were malignant, with a mean age at diagnosis of 63.8 years and a male/female (M/F) sex ratio of 1.7:1. Among the malignant tumors, 86.2% were epithelial tumors with a mean age at diagnosis of 64.8 years and an M/F sex ratio of 1.9. Other malignant tumors consisted of metastatic tumors (10.2%), lymphoproliferative tumors (2.1%) and mesenchymal tumors (1.5%). Most common carcinoma subtypes were adenocarcinoma (48.0%), squamous cell carcinoma (23.0%) and small cell carcinoma (13.3%). Carcinoid tumors were the only carcinoma subtype with an M/F sex ratio below 1 (0.7). Salivary gland tumors were the carcinoma with lowest mean age at diagnosis (45.5 years).
  
  
  CONCLUSIONS
  The histologic distribution of lung tumors in Lebanon is similar to that in developed countries. We believe this resemblance is due to common smoking habits, known to be responsible for the increase of lung adenocarcinoma at the expense of other subtypes.
authors: Hematology-Oncology Department, Hotel-Dieu de France University Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon E-mail : marcrassymd@gmail.com.
authors: Hampig Raphael
authors: HR
authors: Kourie
authors: Marc
authors: M
authors: Rassy
authors: Claude
authors: C
authors: Ghorra
authors: Samah
authors: S
authors: Naderi
authors: Joseph
authors: J
authors: Kattan
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000368:Aged; D002276:Carcinoid Tumor / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D055752:Small Cell Lung Carcinoma / Q000473:pathology*; D013997:Time Factors