Glomus Tumor Donna M. Coffey Glomus tumors are benign neoplasms derived from cells of the neuromyoarterial glomus or glomus body (malignant variants of this tumor, glomangiosarcomas, are discussed in Chapter…

Rare Adenomas Pulmonary adenomas include alveolar adenomas, papillary adenomas, and mucinous cystadenomas. All are extremely rare neoplasms. Part 1 Alveolar Adenoma Alvaro C. Laga Timothy C. Allen Philip T. Cagle…

Solitary Fibrous Tumor Alvaro C. Laga Timothy C. Allen Philip T. Cagle Solitary fibrous tumors (SFTs) are well-circumscribed spindle-cell mesenchymal neoplasms with hemangiopericytoma-like pattern with characteristic branching vessels (“staghorn vessels”)…

Sclerosing Hemangioma Alvaro C. Laga Timothy C. Allen Mary L. Ostrowski Philip T. Cagle Sclerosing hemangiomas are lung tumors originally considered to be of endothelial origin due to their vascular-like…

Hamartoma Donna M. Coffey Hakan Çermik’s Mary L. Ostrowski Hamartomas are the most common benign pulmonary neoplasm. They are usually solitary asymptomatic peripheral masses discovered incidentally as “coin lesions” on…

Minute Meningothelial-Like Nodule (Chemodectoma) Alvaro C. Laga Timothy C. Allen Philip T. Cagle Minute meningothelial-like nodules (MMLNs), previously called chemodectomas, are common, tiny, incidental interstitial nodular proliferations. MMLNs have diameters…

Carcinoid Tumorlets Alvaro C. Laga Timothy C. Allen Philip T. Cagle Carcinoid tumorlets are relatively common, generally incidental, pathologic findings. Although not typically identified grossly, carcinoid tumorlets have been described…

Other Cancers of the Lung These cancers are extremely rare as primary tumors of the lung and are much more likely to be encountered as metastases or locally invasive tumors…

Noncellular Structures Alvaro C. Laga Timothy C. Allen Carlos Bedrossian Mary L. Ostrowski Philip T. Cagle A variety of noncellular structures may be incidentally observed in lung tissue samples. They…

Reactive Changes, Nonspecific Findings, and Age-Related Changes Alvaro C. Laga Timothy C. Allen Mary L. Ostrowski Philip T. Cagle Numerous reactive changes, nonspecific findings, and age-related changes may be observed…