Intrapulmonary Lymph Nodes Alvaro C. Laga Timothy C. Allen Intrapulmonary lymph nodes are generally a normal finding. They are increasingly recognized with imaging techniques in heavy smokers and individuals with…

Focal Scars Alvaro C. Laga Timothy C. Allen A variety of conditions can be associated with localized areas of fibrosis within the lungs. The most frequent causes of these lesions…

Non-Langerhans-Cell Histiocytoses Non-Langerhans-cell histiocytoses include a myriad of histiocytoses, many of which have primarily cutaneous manifestations. The following have been described in the lung. Part 1 Erdheim-Chester Disease Timothy C….

Lymphangioleiomyomatosis Jaishree Jagirdar Lymphangioleiomyomatosis (LAM) is a rare interstitial lung disease that typically occurs in women of child-bearing age. It is characterized by widespread abnormal proliferation of smooth muscle in…

Apical Scars Alvaro C. Laga Timothy C. Allen Apical scarring of the lung, often referred to as apical caps, is found predominantly in older men and is usually a bilateral…

Lymphoid Interstitial Pneumonia Timothy C. Allen Lymphoid interstitial pneumonia (LIP) is presently regarded as a collection of dense lymphoid tissue within the lung that is highly suggestive of, and must…

Nodular Lymphoid Hyperplasia Timothy C. Allen Nodular lymphoid hyperplasia (NLH), referred to in the past as pseudolymphoma (a term to be avoided), is a rare reactive lymphoid proliferative disorder generally…

Seromucinous-Gland Neoplasms Seromucinous-gland neoplasms are uncommon neoplasms that arise from the bronchial glands. They include true mucous-gland adenomas as well as tumors similar to those found in the salivary glands….

Giant-Cell Tumor Alvaro C. Laga Timothy C. Allen Philip T. Cagle Primary giant-cell tumor (GCT) of the lung, a tumor histologically resembling giant-cell tumor of the bone, is extremely rare—only…

Pulmonary and Pleural Lymphangiomatosis Timothy C. Allen Megan K. Dishop Lymphangiomatosis is a rare disease of childhood and early adulthood involving the lung and pleura. Patients with lymphangiomatosis generally present…