Pseudotuberculous nodules are lesions caused by eggs in schistosomiasis. Acute egg nodules are an acute necrotic, exudative lesion caused by mature eggs. After 10 days of acute egg nodules, the capillaries in the eggs die, the eggs and necrotic material are removed, absorbed or calcified, and the macrophages in the lesion are diffused into epithelial-like cells and foreign multinucleated giant cells, forming granulomas similar to tuberculosis nodules, called pseudotuberculosis nodules, or chronic egg nodules. Due to repeated infection, the female worms keep laying eggs, which are deposited in batches in the intestinal wall, and the lesions vary in age. There is a possibility of carcinogenesis based on fibrous thickening, chronic ulceration, and polyp formation. Related tests are plasma cell examination, plasma cavity fluid protein examination, and plasma cavity fluid pathogen examination.