Symmetrical pain nodules the size of the nucleus of the sycamore

Introduction The bilateral symmetry of the plum nucleus and the painful nodules are the main clinical manifestations of nodular erythema.

Cause

Etiology: The etiology is complex and is generally considered to be a delayed response to vascular allergy caused by a variety of factors. Children mainly seen in streptococcal diseases (such as rheumatic fever, scarlet fever) and primary tuberculosis, sometimes seen in the recovery period of measles (due to allergic reactions during the rash period, allergies occur during the recovery period), and occasionally in pneumonia, yeah After the infection of Mycobacterium tuberculosis, fungal disease, cat scratching or application of drugs. May be complicated by localized enteritis, ulcerative colitis, sarcoma-like disease or Behcet's disease. It may also be a symptom of nodular polyarteritis in collagen disease. It is currently considered to belong to type IV allergic reaction.

an examination

Related inspection

Sarcoidosis antigen (Kveim) test

Diagnosis: Nodular erythema is the main symptom of the mass speculative nodules of the nucleus with bismuth symmetry. At the beginning of the onset, there are many fevers and joint pains. Skin lesions often occur suddenly. Small Rumei plums, like jujubes, are as few as several, up to dozens. Symmetrical birth, around the embryo, especially in front of the scorpion. Such as the melon vines wrapped, micro-long skin, the skin around the tightness of the swelling, the touch of burning and pain. Its color gradually turns from bright red to purple and finally turns yellow, and it fades on its own. The nodule can last for a few days or weeks, slowly subsiding, no ulcers, no scars, but can occur repeatedly.

Differential diagnosis

Differential diagnosis: attention should be distinguished from hard erythema and allergic vasculitis.

Erythema induratum is a disease that is not known to occur in women. Often invade the lower leg of the knee below the lower extremity, can also invade the lateral side of the lower leg, the thigh above the knee, and even invade the upper limb, the head and face are rare, showing bilateral symmetry of the limb or bright red, or dark red, or purple red nodular Damage, tenderness is obvious, generally not itchy. Bazin hard erythema and Wlitfield hard erythema. More common young and middle-aged women.

Vasculitis is a group of diseases associated with vascular necrosis and inflammation. Most of the causes are unknown, and the more obvious causes are serum diseases, drug-induced reactions and infections; hepatitis B virus has been confirmed to be the cause of various vasculitis. Clinically divided into two major categories of original and secondary. It can cause blood vessel embolism, leading to ischemia and then causing local tissue infarction. Occurrences in large blood vessels can also cause aneurysms, such as intimal dissection to form an arterial dissection.

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