Co-existence of Parkinson's disease and knee synovial chondromatosis Entry Synovial chondromatosis (SC), seen in synovial joints and to secondary proliferation that breaks off cartilagenous nodules that can cause It is a rare arthropathy characterized by the formation of Synovial chondromatosis is mostly knee, hip, large, such as elbows, shoulders, and ankles seen in the joints. 1 Definitive etiology unknown and a kind of synovial thought to be metaplasia. Chondromas enlarge in the synovium and then falling and forming free bodies some of the chondromas called osteochondroma. form calcified nodules. Typical The appearance is mostly mono-articular. Each how much joint like bursa and tenosynovium Although exclusions have been reported, often occurs within the joint.2 Parkinson's disease (PD), mainly affecting people later in life It is a progressive neurodegenerative disease. PH prevalence in industrialized countries generally between 0.3% and 60% of the entire population about 1% of people over age It is estimated that 3 PH symptoms: tremor, stiffness, movement slowing, postural instability, and gait is the difficulty. More disease symptoms As it becomes more evident, the patient is more likely to walk. experience difficulties and therefore patients tend to fall. they tend. 4 In this case, we have two factors affecting walking. PH, which is a separate problem, and a rare We presented the SK association. Case Presentation Sixty-six-year-old male patient with PH increased left during the rehabilitation program He applied to the outpatient clinic with the complaint of knee pain. The patient has been present for the past few months. The mechanical pain has been so bad for the past few days. had intensified. The patient's pain is also at rest unable to relax and have difficulty walking was causing. Left knee on physical examination range of motion flexion 110 degrees, extension is the last 10 seconds of the range of motion. was severely limited and range of motion was Left knee was painful throughout. suprapatellar There was minimal swelling in the area. redness, heat There was no increase, but there was crepitation. patient short He was walking antalgic with broad strides. of PH bradymimia with cardinal signs, there was bradykinesia, slowed movements but there was no rigidity. proprioceptive no obvious pathology was not found. rasagiline for PH, pramipexole, He was using levodopa, amantadine sulfate. Hemogram and basic biochemistry tests were normal. Planned for your knees in the left knee on direct radiographic examination narrowing of the medial joint space, osteophytic changes and 10×11 mm radiopaque lesion observed (Fig. 1). From patient to left knee magnetic resonance (MR) imaging was planned. Suprapatellar MR findings in the left knee, the largest of which is 12 mm in the bursa. There were many bone fragments. MRI synovial grade 3 gonarthrosis with chondromatosis, Findings compatible with chondromalacia patella reported as (Figure 2). The patient's The rehabilitation program was suspended. Analgesic therapy was reorganized. Surgery by contacting the orthopedic specialist patient orthopedics for treatment planning was referred to the clinic. Information to the patient about the case study given and written consent form from the participant receipt.