CT Manifestation of Inflammatory Pulmonary Granuloma

Pulmonary inflammatory granulomas typically present with the following manifestations on CT imaging:

1. On CT scans, pulmonary inflammatory granulomas often appear as localized nodular or mass-like shadows in the lungs. Their boundaries are usually clear or slightly blurred, and their sizes may vary; some cases may present with multiple lesions. The internal density of these lesions is often inhomogeneous, with possible calcification, cavitation, or low-density necrotic areas, reflecting inflammatory cell infiltration, fibrous tissue proliferation, and possible necrotic processes within the granulomas.

2. During contrast-enhanced scanning, some granulomatous lesions may show enhancement at the periphery while the center shows no significant enhancement, forming a "ring enhancement" or "target sign," which is one of the more characteristic CT findings of pulmonary inflammatory granulomas.

3. Inflammatory changes such as increased and thickened lung markings surrounding the lesions and thickening of the adjacent pleura may also be observed, which helps differentiate pulmonary inflammatory granulomas from other neoplastic lung diseases.

These imaging features typically suggest pulmonary infection or inflammation and require comprehensive analysis in conjunction with the patient's clinical symptoms and results from other diagnostic tests. Regular follow-up CT scans during treatment are also important for evaluating therapeutic response and disease progression.