A 32-year-old male patient was admitted to the outpatient clinic with complaints of weight gain, dry mouth, and fatigue. In 2002, some eruptions appeared on the skull. Two (2) years later, skin eruptions spread all over his body. At that time, he was diagnosed with psoriasis and prescribed topical clobetasol propionate. He had not been reexamined after that and has been using clobetasol propionate 0.005% routinely for 10 years. He has applied the drug to his arms, legs, and all over the trunk. Over the past year, he put on weight obviously (8 kg). He stopped the treatment 1 month ago, at the time of writing. He has been complaining of dry mouth and fatigue for the last month. On his physical examination, moon face, central adiposity, and purple-red striae on the abdomen under umbilicus were observed. There were scaly patches and erythematous plaques on the skull, interscapular area, sacrum, arms, legs, knees, and elbows []. Other systemic examinations were all normal. Blood pressure was 130/90 mmHg, pulse 75/min, height 1.76 m, weight 77 kg, and body mass index 24.8 kg/m2. On laboratory examination, fasting blood glucose: 152 mg/dL (N: 70-105), creatinine: 1 mg/dL (N: 0.72-1.25), triglyceride: 160 mg/dL (N: 0-200), total cholesterol: 240 mg/dL (N: 0-200), high-density-lipoprotein (HDL)-cholesterol: 44 mg/dL (N: 45-55), low-density-lipoprotein (LDL)-cholesterol: 164 mg/dL (N: 0-130), ALT: 42 u/L (N: 0-55); AST: 27 u/L (N: 0-34); sodium: 140 mmol/L (N: 136-145); potassium: 4.6 mmol/L (N: 3.5-5.1); calcium: 9.9 mg/dL (N: 8.4-10.2); phosphorus: 3.5 mg/dL (N: 2.3-4.7); albumin: 4.6 g/dL (N: 3.2-5.2); intact-parathyroid hormone (iPTH): 38 pg/mL (N: 14-72); 25-OH Vitamin D: 4.9 ng/mL (N: 24-50); white blood cell (WBC) count: 12.76-103 /uL (N: 4.23-9.07); hemoglobin (Hb) count: 14.7 gr/dL (N: 13.7-17.5); platelet: 217-103 /uL (N: 150-400); morning (8 AM) adrenocorticotropic hormone (ACTH): 5.6 pg/mL (N: 0-46); morning (8 AM) serum cortisol: <0.2 μg/dL (5.5 nmol/L) (N: 4.3-22.4). According to these findings, the patient was diagnosed with iatrogenic Cushing's syndrome secondary to topical steroid use. For adrenal insufficiency, 20 mg/day hydrocortisone treatment was commenced, and for vitamin D deficiency, vitamin D replacement. As the patient had high blood glucose levels, dyslipidemia, and large waist circumference (101 cm), he was diagnosed with metabolic syndrome, and a low-calorie diet and exercise were advised. Metformin treatment at a dose of 2000 mg/day was commenced for glucose regulation. The patient consulted at the dermatology department for his psoriasis, and calcipotriol pomade and emollients were prescribed. One (1) month after that, 1 μg tetracosactide i.v. was applied and cortisol levels were measured at 30 min and at 60 min. As both measured levels were below 3 μg/dL, glucocorticoid maintenance treatment was continued.
The formula for computing Cockcroft-Gault is given by CrCl = ((140 - age) * adjusted weight * (gender_coefficient)) / (serum creatinine * 72), where the gender_coefficient is 1 if male, and 0.85 if female. The serum creatinine concentration is in mg/dL.
The patient's gender is male, which means that the gender coefficient is 1.
The patient is 32 years old. 
The concentration of creatinine is 1.0 mg/dL. 
The formula for computing the patient's BMI is (weight)/(height * height), where weight is the patient's weight in kg and height is the patient's height in m.
The patient's height is 1.76 m. The patient's weight is 77.0 kg. The patient's bmi is therefore 77.0 kg / (1.76 m * 1.76 m) = 24.858 kg/m^2.The patient's BMI is 24.9, indicating they are normal weight.
Because the patient is normal, we take take minimum of the ideal body weight and the patient's body as the patient's adjusted weight for the Cockroft-Gault Equation. Hence, the adjusted body weight is the minimum of the two giving us an adjusted body weight of 71.369 kg.

Using the Cockcroft-Gault equation:
CrCl = ((140 - age) * adjusted weight * gender_coefficient) / (serum creatinine * 72).
Plugging the patient's values gives us ((140 - 32) * 71.369 * 1) / (1.0 * 72) = 107.053 mL/min. Hence, the patient's creatinine clearance is 107.053 mL/min.