Malignant glomus tumour of the lung

A case of cutaneous malignant glomus tumor

Glomus tumors are well-known but relatively rare vascular neoplasms, with their malignant counterparts still being rarer. There are very few reports of cutaneous malignant glomus tumors, and the current limited evidence suggests that they follow a more indolent course than deep-seated malignant glomus tumors. Herein, we are reporting a case of cutaneous malignant glomus tumor. A 94-year-old male presented with a right-sided ulcerated scalp lesion, which, on biopsy, showed a diffusely infiltrative epithelioid malignancy with considerable pleomorphism and a notable perivascular growth pattern. The tumor cells were positive for smooth muscle actin (SMA) and h-caldesmon, and negative for cytokeratin MNF116, CK5, p40, S100, SOX10, HMB45, Melan-A, ERG, CD31, CD45, CD3, CD20, ALK, desmin, CD68, CD34, and HHV8. A diagnosis of cutaneous malignant glomus tumor was made, and the patient underwent a wider excision. Cutaneous malignant glomus tumors are extremely rare and should be considered when examining unusual cutaneous mesenchymal tumors.

Case report of malignant pulmonary parenchymal glomus tumor: imaging features and review of the literature

Glomus tumor is rare tumor which arises from glomus body and is most frequently found in the soft tissue of the extremities. The lung is a rare ectopic site, and a malignant glomus tumor arising from pulmonary parenchyma is particularly uncommon. To deepen our understanding on their imaging features, we report a case of malignant glomus tumor of pulmonary parenchyma confirmed with surgical histopathology and immunochemistry and review the medical literature on pulmonary parenchymal glomus tumors with emphasis on their imaging features.

Malignant glomus tumor of the lung with multiorgan metastases: case report and literature review

Glomus tumor is an exceedingly rare neoplasm that is derived from cells of the neuromyoarterial glomus or glomus body. It rarely occurs in the visceral organs where glomus body may be sparse or even absent, such as the stomach, intestines, mediastinum, and respiratory tract. It is unusual for a glomus tumor to demonstrate atypical or malignant histopathological characteristics. It is also rare for such a tumor to express clinically aggressive behavior. However, when metastasis does occur, this disease is often fatal. We herein report an interesting case of a middle-age woman admitted due to progressive cough and hemoptysis. A polypoid mass was found to occlude the left lingular lobar bronchus. Final histopathologic examination showed the presence of malignant glomus tumor, confirmed by immunoreactivity for smooth muscle actin and vimentin. Two months later, the patient developed abdominal distension and gastrointestinal bleeding. Further evaluation lead to the discovery of widespread metastatic disease to the gastrointestinal tract, spleen, and the left adrenal gland. We further entail a review of the literature on the clinicopathologic features and diagnosis of this uncommon tumor.

Malignant glomus tumor of the lung with multiple metastasis: a rare case report

Malignant glomus tumor, or glomangiosarcoma, is a very rare mesenchymal neoplasm that, when seen, occurs in visceral organs. Despite having histologic features of malignancy, these tumors usually do not metastasize. However, when metastasis occurs, this disease is often fatal. Our report presents the case of a 59-year-old female patient with a highly aggressive and widely metastatic glomus tumor of the lung.

A primary pulmonary glomus tumor: a case report and review of the literature

A case of a glomus tumor originating from the lung is reported. A 43-year-old female had undergone resection of a right lung tumor following a clinical diagnosis of carcinoid, sclerosing hemangioma, or other sarcoma. Histologically, the tumor comprised uniform small round to oval cells with centrally located nucleus, a clear cytoplasm, and apparent cell borders. The tumor also showed a focally hemangiopericytomatous pattern with irregularly branching or dilated vessels. Electron microscopy revealed smooth muscle differentiation of the tumor cells. Immunostaining further revealed that the tumor cells expressed smooth muscle actin, h-caldesmon, muscle specific actin (HHF-35), but not cytokeratin, epithelial membrane antigen, synaptophysin, or chromogranin A. Based on these findings, a diagnosis of primary pulmonary glomus tumor was established. Glomus tumors of the lung are very rare and only 21 cases have been reported to date. The histological features of the present tumor and the relevant literature are discussed.