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Rabson-Mendenhall syndrome (RMS) is a rare autosomal recessive disorder characterized by severe insulin resistance, a condition in which the body’s tissues and organs do not respond appropriately to the hormone insulin. Insulin resistance impairs blood sugar regulation and ultimately leads to diabetes mellitus. A 19-year-old male presented with joint pain, blurring of vision, and generalized weakness. Investigations revealed hyperglycemia (random blood sugar (RBS)> 625 mg/dL, glycosylated hemoglobin (HbA1c) 18%), as well as sugars, protein, and ketone bodies in urine routine examination. An ultrasound of the abdomen was normal. Cardiac status was normal. Based on the clinical features, particularly the head to toe examination, skin changes, and the onset of type 2 diabetes mellitus, RMS syndrome was considered. The joint pain was alleviated with intravenous tramadol. Actrapid®, a fast-acting …