Leiomyoma’s are benign smooth muscle tumors most commonly seen in the uterus occasionally in the gastrointestinal tract. Pulmonary localization is extremely rare with the incidence of less than 2% .We report a case of 22 year old nonsmoking female presented with left sided chest pain,streaky hemoptysis.Chest X ray suggestive of left lingular and lower lobe collapse. CECT showed endobronchial obstruction in left main bronchus.Debulking done with electrocautery snare.HPE showed spindle shaped cells with eosinophilic cytoplasm.Immunohistochemistry showed SMA positivity suggestive of leiomyoma.Patient is under followup without any complication and recurrence.

keywords :leiomyoma,endobronchial tumor,benign tumor

Introduction :

Leiomyoma’s are benign smooth muscle tumours of mesenchymal origin. Most commonly seen in uterus occasionally in gastrointestinal tract. Pulmonary localization is extremely rare and accounts for less than 2%¹.Benign endobronchial neoplasms are classified as mesenchymal, submucosal glandular, and surface epithelial tumors based on their origin.Mesenchymal tumors forms the majority of endobronchial tumors, hamartoma being most common².Pulmonary leiomyoma can present as tracheal tumors,endobronchial lesion or as parenchymal lesion³.Parenchymal lesion are usually asymptomatic and diagnosed incidentally,whereas tracheal and endobronchial tumors can present as chronic cough,stridor, hemoptysis,recurrent atelectasis and present as obstructive pneumonia. Endobronchial leiomyoma rarely proposed to originate from the areas of cicatricial fibrosis.Usual age of presentation is 30-40 years and there is no gender preponderance.Few literature reports to show female predominance,it could be due to over reporting of benign metastasizing uterine leiomyoma in females⁴.