PMC9852764_01
Melanin deposition in the patient's auricle and face.
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F1
Physical examination revealed multiple skin melanin deposits, especially on the face and auricle (Figure 1).
Preoperative hip and knee joint movements.
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F2
The flexion, extension and lateral flexion of the spine were significantly limited (Figure 2), the straight leg raising test of both lower extremities were negative.
Pre and postoperative digital radiation (DR) image. (A) Preoperative full leg weight bearing x-Ray of both lower extremities. (B) Preoperative anteroposterior and lateral DR views of lumbar. (C) Preoperative anteroposterior DR view of pelvic. (D) Preoperative anteroposterior and lateral DR views of left knee. (E) Postoperative anteroposterior and lateral DR views of left knee.
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F3
Digital radiography (DR) showed hyperplasia of bilateral sacroiliac joint surfaces, osteoporosis of both hips and knees, joint space narrowing, intervertebral space narrowing, and vertebral border hyperplasia (Figures 3A-D). Postoperative DR showed that the position of the knee prosthesis was satisfied (Figure 3E).
(A-C) Melanin deposits on articular cartilage during surgery. (D) A bone fragment taken during surgery.
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F4
During the surgery, a large amount of black deposit was found in the articular cartilage surface and patellar ligament of the left knee (Figures 4A-D).
The timeline of full-process of assessment and therapy.
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F5
The timeline of full-process of assessment and therapy is shown in Figure 5.