42 y/o, Chest Pain

42-year-old patient presented with chest pain.

Figure 1. AP scanogram shows right lower zone opacity.

Figure 2A. CECT sections show mass in right lower lobe with prominent vessels within.

Figure 2B. CECT sections show mass in right lower lobe with prominent vessels within.

Figure 2C. CECT sections show mass in right lower lobe with prominent vessels within.

Figure 2D. CECT sections show mass in right lower lobe with prominent vessels within.

CT showed mass in right lower lobe with prominent vessels within.

The sequestrated portion of lung is usually more echogenic than the rest of the lung.

Angiography is not part of routine investigation but is the gold standard in determining arterial supply.

MR angiography can be helpful in demonstrating anomalous arterial supply.

Pulmonary sequestration, also called accessory lung, refers to aberrant formation of segmental lung tissue that has no connection with the bronchial tree or pulmonary arteries.

Extralobal sequestration (ELS) more commonly presents in newborns, whereas intralobal sequestration (ILS) presents in late childhood or adolescence with recurrent pulmonary infections.

The two types of sequestration are similar in their relationship to the bronchial tree and arterial supply/venous drainage but differ in their relationship to the pleura.

Almost all cases occur sporadically.

Traditionally, treatment has been a surgical resection.

General imaging differential considerations include persistent pneumonia and bronchogenic cyst.