A rare entity: primary pulmonary meningioma

Abstract

Meningioma is the most common tumor of the central nervous system (CNS). Except for the CNS, it can be detected at a rate of 1-2% in the head and neck region. Primary pulmonary meningiomas (PPM) are extremely rare. They are detected incidentally as a solitary pulmonary nodule during radiological examinations. On computerized tomography (CT), the lesions are generally seen as a uniform and homogeneous mass. Although they are usually benign and the prognosis is excellent, they may be subject to misdiagnosis and overtreatment. (1-3). Here we have aimed to present a case of primary pulmonary meningioma that appeared as a solitary pulmonary nodule and to discuss its clinical and pathological features.

Multiple primary pulmonary meningioma: A case report and literature review

“…[3][4][5][6] PPM mostly manifests as a single solitary pulmonary nodule. [7][8][9] Previous case reports have not reported on the specific density or appearance of the nodules. In our case, multiple nodules in both lungs of the patient had a groundglass-like opacity; the right upper lobe nodule had a density of À657 (diameter: 5.5 mm), and the right lower lobe nodule had a density of À748 (diameter: 8.8 mm).…”

Primary pulmonary meningioma and minute pulmonary meningothelial-like nodules: Rare pulmonary nodular lesions requiring more awareness in clinical practice

“…Patients with PPMs and MPMNs usually present with no obvious symptoms, other than some atypical respiratory symptoms, although this can depend on tumor size, location, and accompanying diseases[ 5 - 7 ]. PPMs are usually found through imaging examinations[ 5 , 8 ]. Patients with PPMs are mainly middle-aged or older women[ 1 , 7 , 9 ].…”

“…Patients with PPMs are mainly middle-aged or older women[ 1 , 7 , 9 ]. The vast majority of PPMs are benign, well-circumscribed and solitary, with a favorable prognosis[ 5 , 10 - 12 ]. Therefore, the major therapeutic method for PPM is surgery, such as wedge resection or lobectomy[ 8 , 10 , 13 , 14 ].…”

“…Radiologically, PPMs most commonly appear in the form of pulmonary nodules[ 5 ]. However, the visual features of PPM nodules are not universal, for example, they can appear either as a solitary nodule or in clusters[ 7 , 15 ].…”

“…PPM nodules usually manifest as a round homogeneous mass with well-demarcated borders on imaging examinations[ 5 , 7 , 13 , 18 ]. PPMs can appear with ground-glass opacity and cyst-like structures or calcifications, depending on the changes in the lesion[ 7 , 18 ].…”