What is a shelf syndrome?
The shelf syndrome is the English term for plica syndrome and describes a condition of the mucosal folds when they are acutely or chronically inflamed and swollen due to overuse or microtrauma. Accordingly, pain, restricted movement and entrapment of the knee occur. You can find additional information about this under: Shelf Syndrome
Duration
The diagnosis of an inflamed and enlarged mucosal fold can often be made by an experienced physician through the patient’s description of the symptoms. The description of the blockages, bending pain, the feeling of resistance and cracking and creaking noises indicate a mucosal fold. The absence of an accident mechanism, but instead the description of a loading moment (e.g. jogging on uneven ground), also increases the suspicion. In addition, in some cases the thickened mucosal fold in the knee can be palpated during a palpation examination. If the results of the examination are unclear and other causes are excluded, an ultrasound, X-ray or MRI may be considered.
Therapy
The therapy of the mucosal fold can usually be carried out without surgery. Since the pain is usually only caused by certain movements or exercises, it is recommended to refrain from this triggering activity. In the acute situation, it is advisable to protect and cool the patient.
In the long term, the knee and its muscles should be strengthened. The thigh muscles in particular can increase stability by strengthening them and thus also protect the knee joint. The knee extensor (Musculus quadriceps femoris) helps to let the kneecap run centrally over the knee and to guarantee a stable guidance.
In addition, training the inner part of the muscle (vastus medialis) can prevent the kneecap from slipping. If the problems persist, arthroscopy may be considered. An arthroscopic removal of a mucosal fold is a relatively uncomplicated procedure.
An irrigation system and surgical tools are inserted into the knee through two to three openings. Once the mucosal folds are found, they are removed. This entire procedure can be performed under regional (e.g. plexus anesthesia).
The procedure takes no longer than 15-20 minutes. After the procedure, the leg can usually be loaded again. Depending on the range of activities, incapacity to work can last from a few days to a month.
Sport should only be resumed to the full extent after two to six weeks. An arthroscopy is recommended if the complaints cannot be resolved by conservative procedures. Arthroscopic surgery is also recommended for people who are very active in sports in order to prevent long-term wear and tear (arthrosis).
