Inflammatory Pseudotumor/Inflammatory Myofibroblastic Tumor Handan E. Zeren Angela Shen Alvaro C. Laga Timothy C. Allen Philip T. Cagle Many issues regarding inflammatory pseudotumor and inflammatory myofibroblastic tumor (IMT) are unresolved,…
Pulmonary Hyalinizing Granuloma Alvaro C. Laga Timothy C. Allen Keith M. Kerr Philip T. Cagle Pulmonary hyalinizing granuloma is a rare non-neoplastic fibrosclerosing inflammatory lung condition. Lesions are often identified…
Sarcoid-Like Reaction Abida K. Haque Sarcoid-like epithelioid granulomas may be seen in lung parenchyma, and in thoracic lymph nodes draining areas of a lung with carcinoma.
Metaplastic, Dysplastic, and Premalignant Lesions Metaplastic, dysplastic, and other premalignant proliferations are often precursors to lung cancers. These lesions are important to recognize for diagnostic purposes, for their importance in…
Infectious Granulomas Infection is a common cause of granuloma formation. The most common infections resulting in granulomas are tuberculosis, fungi, and parasites. Part 1 Tuberculosis Abida K. Haque Tuberculosis is…
Bronchocentric Granulomatosis Roberto Barrios Keith M. Kerr Bronchocentric granulomatosis is characterized by destructive, necrotizing bronchocentric and bronchiolocentric inflammation. Early lesions show partial epithelial erosion and replacement of the airway wall…
Rare Mesenchymal Tumors Mesenchymal neoplasms including leiomyoma, lipoma, chondroma, and a variety of neural tumors rarely occur as primary lung neoplasms. Their histopathologic features are similar to those of the…
Rounded Atelectasis Armando E. Fraire Kamala Murali Svetoslav Bardarov Rounded atelectasis (RA) is a focus of atelectatic subpleural lung parenchyma associated with infolding of the overlying pleura and scarring. RA…
Pulmonary Ossification Mary Beth Beasley Philip T. Cagle Dendriform ossification consists of linear and branching deposits of metaplastic bone in the pulmonary interstitium that evolves from fibrosis, often contains bone…
Pulmonary Langerhans-Cell Histiocytosis Timothy C. Allen Mary L. Ostrowski Keith M. Kerr The Histiocyte Society divides the histiocytic disorders into three classes: Langerhans-cell histiocytosis (LCH) (class I), non-Langerhans-cell histiocytosis (class…
