Overview
Perivascular epithelioid cell tumor (PEComa) is a rare mesenchymal neoplasm characterized by cells with clear or granular cytoplasm, positive for melanocytic and smooth muscle markers. 1Diagnosis
Imaging (CT, MRI) often reveals a mass with nonspecific characteristics.
Definitive diagnosis requires histopathological examination showing perivascular arrangement and immunohistochemical positivity for markers like HMB45, Melan-A, and smooth muscle actin.
No specific grading system universally accepted; morphology and mitotic activity may guide assessment. 1Management
Surgical excision is the primary treatment modality for localized PEComas.
Adjuvant therapy (chemotherapy, radiation) is considered for high-risk features or metastatic disease, though specific regimens are not detailed in current abstracts.
Follow-up imaging and clinical monitoring essential due to potential for recurrence or metastasis. 1Special Populations
No specific data provided regarding PEComa in pregnancy, pediatrics, elderly, or patients with comorbidities in the given abstracts. 1Key Recommendations
Definitive diagnosis of PEComa requires histopathological confirmation with characteristic immunohistochemical markers. (Evidence: Weak) 1
Surgical resection should be considered the first-line treatment for localized PEComa. (Evidence: Expert opinion) 1
Post-surgical surveillance is crucial due to the risk of recurrence or metastasis. (Evidence: Expert opinion) 1References
1 Geramizadeh B, Salehzadeh A, Ghazinoor M, Moaref A, Mollazadeh R. Perivascular epithelioid cell tumor of the pericardium: a case report. Cardiovascular pathology : the official journal of the Society for Cardiovascular Pathology 2008. link