Why does a lung mass have spikes?

A lung mass may show spikes on imaging, such as a CT scan, due to irregular edges or growth patterns associated with certain types of tumors. These spikes or lobulations often indicate malignancy, as cancerous masses tend to have more aggressive and uneven growth compared to benign lesions. The spikes can also reflect the infiltration of surrounding tissues or the presence of necrosis within the tumor. Ultimately, the appearance of spikes can help radiologists and physicians assess the nature of the lung mass.