Table 1. Clinical data of five patients with paraneoplastic syndrome.

Number	Gender	Age	Symptoms or signs	Tumor origin	Pedunculated or not	Size (cm3)	Malignancy	Others
1	Female	64	Chest tightness, cough, and clubbed fingers	(Right) parietal pleura	Wide base	18×14×12	Benign	Invasion of the lung parenchyma
2	Male	43	Can not extend (keep straight) his right elbow	(Lower left) visceral pleura	Yes	17×15×10	Benign	Tumor necrosis and hemorrhage
3	Female	30	Swelling and percussive pain of the right knee	(Left) parietal pleura	Wide base	5.5×4×4	Malignant	none
4	Female	59	Chest pain, chest tightness, cough, and early morning confusion	(Right upper) visceral pleura	Wide base	20×19×10	Benign	Invasion of the lung parenchyma
5	Male	73	Swelling of the right knee	(Lower right) visceral pleura	Yes	5×4.5×3.5	Benign	none