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What is it?: If a liar says they are lying, they are telling the truth, which means that they are lying about lying

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A 72-year-old man has three months of gradually worsening back pain in his thoracic and lumbar spine. He has hypertension and atrial fibrillation. He is taking bisoprolol and apixaban. He has no other past medical history. He is an ex-smoker with a 30-pack-year smoking history. He drinks 20 units of alcohol per week. The pain is now keeping him awake at night and he has weakness in his legs. He has lost 4 kg in weight and has also been constipated for the last month. He has had nocturia and urinary urgency for the last 2 years. These have not changed. He is tender over T4/5 and L3/4 verterbrae. He has weakness of ankle dorsiflexion and knee flexion and extension in both legs. He has an enlarged, irregular, firm prostate on rectal examinationinvestigations show: serum calcium - 3 mmol/L (2.2-2.6) prostate specific antigen (PSA) 150 μg/L (<4)tumour mass in the upper thoracic spinal canal and in the prevertebra

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A 45-year-old electrical engineer presents to your clinic, complaining of spots on his scrotum. He first noticed the spots several months ago, and they have gotten bigger. He denies any pain with urination or with sexual intercourse. He has had no fever, night sweats, weight gain, or weight loss. His past medical history consists of a vasectomy 10 years ago and mild obesity. He is on medication for hyperlipidemia. He denies any tobacco or illegal drug use and drinks alcohol socially. His mother has Alzheimer's disease and his father died of leukemia. On examination he appears relaxed and has unremarkable vital signs. On visualization of his penis, he is circumcised and has no lesions on his penis. Visualization of his scrotum shows three yellow nodules 2-3 millimeters in diameter. During palpation they are firm and nontender. What abnormality of the male genitalia is this most likely to be?A) Condylomata acuminataB) Syphilitic chancreC) Peyronie's diseaseD) Epidermoid cysts

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