A 70 years old woman with a left lung nodule

General weakness 가 5 개월전부터 간헐적으로있었으며 , 1 개월전 local

clinic 에서시행한 chest PA 와 chest CT 상 left lung에 13mm 의 lung nodule 이

발견되어 further evaluation 위해내원함 .

SPN in lingular division of left upper lobe

Gun biopsy: Cellular cores of epithelioid cells

Tumor cells composed of oval or polygonal cells with noderate amount of eosinophilic cytoplasms

Tumor cells composed of oval or polygonal cells with noderate amount of eosinophilic cytoplasm. A few cells having clear cytoplasm

is also found.

Intranuclear inclusions are frequently seen.

Solid pattern of sclerosing hemangioma

Definition of Sclerosing hemangioma

• A lung tumor with a distinctive constellation of histologic findings including: solid, papillary, sclerotic, and hemorrhagic patterns. Hyperplastic type II pneumocytes line the surface of the papillary structures. Cholesterol clefts, chronic inflammation, calcification, laminated scroli-like whorls, necrosis, and mature fat may be present.

• Synonyms and historical notation: pneumocytoma, papillary pneumocytoma- It was named sclerosing hemangioma as if was originally believed to be vascular in origin due to prominent angiomatoid feateres. Current consensus favors a benign or very low-grade neoplasm arising from primitive respiratory epithelium.