Patients with dark-colored filamentous mycosis are most often seen working outdoors and often in contact with such putrefactive materials. It can manifest itself as shallow ulcers, petechiae, brownish-black spots or warty growths, with slight itching or mild swelling and pain, and some may have no conscious symptoms. Subcutaneous tissue type dark filamentous mycosis often has isolated, deep in the subcutaneous or muscle abscesses or cysts, lesions can be apricot kernel large or several centimeters, or even the entire chest large plaques, to confirm the diagnosis of the disease need to do the following tests: 1, chest X-ray Fluoroscopy is a direct examination of the patient placed between the X-ray tube and the fluoroscope. It can do comprehensive dynamic direct observation, such as heartbeat, transverse septal activity, gastrointestinal motility, joint activity, etc. Fluoroscopy is also used in X-ray imaging for positioning observation, gastrointestinal imaging, and for indicating diagnostic operations such as cardiac catheterization, fracture repositioning, foreign body removal, etc. X-ray fluoroscopy is most commonly used in the chest to examine the lungs, pleura, mediastinum, heart, and large blood vessel lesions. It can also be used for the examination of limb bone, soft tissue, foreign body and gas in body cavity, stone, contraceptive ring, etc. 2.CT examination of the chest CT examination of the chest is a method of examining the chest through X-ray computed tomography (CT).