A Case Report of an Intra-Articular Lipoma in the Inferomedial Recess of the Anterior Knee Joint: Clinical Implications and Diagnostic Challenges: Case Report and Review of Literature

Introduction: Lipomas are common benign soft-tissue tumors typically found in subcutaneous regions. Intra-articular lipomas, however, are exceedingly rare and may present with functional impairment. Case Report: A 27-year-old male presented with chronic right knee pain, limited flexion, and inability to run. Clinical examinations ruled out ligamentous or meniscal injuries. Magnetic resonance imaging revealed a 30 × 10 × 27 mm encapsulated intra-articular lipoma in the inferomedial recess of the anterior knee joint. The mass was excised surgically through a medial parapatellar approach, and histopathology confirmed a lipoma. Postoperatively, the patient regained a full range of motion and resolution of pain. Conclusion: This case underscores the importance of considering intra-articular lipomas in differential diagnoses for chronic joint pain and restricted mobility. MRI remains pivotal for accurate diagnosis, and surgical excision ensures favorable outcomes.