Oncology questions

A 25-year-old woman presents to an orthopedic clinic reporting a 6-month history of localized, dull pain in the middle of her left shin. The pain is particularly bothersome at night, often waking her from sleep, and she notes significant but temporary relief with over-the-counter ibuprofen. She has tried ice and rest without sustained improvement. Her past medical history is otherwise unremarkable, save for seasonal allergies. She works as a graphic designer and finds the pain is beginning to interfere with her ability to sit comfortably for extended periods. On examination, there is pinpoint tenderness to palpation over the anteromedial aspect of the left tibial diaphysis. Musculoskeletal examination of the left lower extremity reveals full range of motion at the knee and ankle, normal strength (5/5), and intact neurovascular status distally. Imaging studies, including a radiograph, have been performed and are suggestive of a small, reactive bone lesion with a central lucency. Laboratory results show a White Blood Cell Count of 7.2 x 10^9/L, Erythrocyte Sedimentation Rate of 8 mm/hr, and C-reactive Protein of 1.5 mg/L. Given these findings, what is the most appropriate definitive management strategy for this patient, and what potential complication should be discussed?

A 22-year-old male presents to a general hospital clinic after experiencing his first generalized tonic-clonic seizure. He reports a six-month history of intermittent headaches, gradually increasing in frequency and severity, often accompanied by mild nausea. He denies any prior neurological issues or significant medical history. On physical examination, he is alert but exhibits mild right-sided pronator drift and subtle papilledema on fundoscopic examination. Initial brain imaging reveals a well-demarcated, solid and cystic mass located in the posterior fossa. A subsequent stereotactic biopsy demonstrates a low-grade glial neoplasm characterized by bipolar cells with elongated 'hair-like' processes, microcysts, and abundant eosinophilic, corkscrew-shaped structures consistent with Rosenthal fibers. Given these findings, what is the most appropriate diagnosis and the primary initial management?

A 28-year-old woman presents to her general outpatient clinic for an annual wellness examination. She reports feeling generally well but mentions a recent increase in mild constipation, which she attributes to dietary changes. Her medical history includes no significant chronic illnesses. Her family history is notable for a paternal aunt diagnosed with "thyroid cancer" at a young age and a grandfather who experienced severe, sudden episodes of hypertension. On physical examination, her vital signs are stable: temperature 36.8°C, blood pressure 118/76 mmHg, pulse 68/min, respirations 14/min. She is noted to be tall and slender with a BMI of 20 kg/m2. Examination of the neck reveals a firm, solitary nodule in the left lobe of the thyroid gland, along with several palpable, non-tender cervical lymph nodes. Cardiac and pulmonary exams are unremarkable. Abdominal palpation reveals mild tenderness in the left lower quadrant but no organomegaly. A characteristic finding of small, sessile papules are observed on her lips and tongue. Given these findings, what is the most likely underlying diagnosis and the critical initial step in her management?

A 55-year-old man presents to the clinic with a 4-month history of persistent palpitations, heat intolerance, unexplained weight loss of 7 kg, and increased frequency of bowel movements. He also reports increasing difficulty swallowing large meals. He denies any recent infections or neck pain. His past medical history includes well-controlled type 2 diabetes and dyslipidemia. On examination, his temperature is 37.8°C, blood pressure is 155/95 mmHg, pulse is 122/min and irregularly irregular, and respirations are 20/min. He appears anxious with a fine tremor of outstretched hands. Ocular examination reveals no proptosis or lid lag. Neck palpation reveals an enlarged, firm, and nodular thyroid gland, approximately 5x4 cm, which is non-tender. No cervical lymphadenopathy is noted. Cardiopulmonary examination is significant for the irregularly irregular rhythm and a grade II/VI systolic murmur best heard at the left sternal border. A radioactive iodine uptake (RAIU) scan shows heterogeneous uptake with focal areas of increased activity in multiple nodules and suppressed uptake in surrounding normal tissue. Considering this patient's presentation, what is the most appropriate management strategy and a potential long-term complication if left untreated?

A 28-year-old man presents to an outpatient orthopedic clinic reporting persistent, deep aching pain in his right knee, which has progressively worsened over the past three months. He describes the pain as unremitting, not significantly relieved by over-the-counter analgesics like naproxen or acetaminophen, and often worse at night despite rest. He denies any history of trauma, strenuous activity, or recent injury to the joint. His past medical history is unremarkable. On physical examination, his vital signs are stable: temperature 37.0°C, blood pressure 122/78 mmHg, pulse 68/min, respirations 14/min, and oxygen saturation 99% on room air. Inspection of the right knee reveals mild effusion and subtle anterior swelling. Palpation elicits tenderness over the distal femur. Range of motion is limited due to pain, particularly with full flexion and extension. There is no warmth or erythema. Neurological and vascular exams of the extremity are intact. Initial laboratory investigations are ordered. A radiograph of the knee reveals a distinct, eccentric lytic lesion extending to the subarticular bone of the distal femur epiphysis, characterized by a "soap-bubble" appearance without significant periosteal reaction or sclerotic margins. What is the most probable diagnosis and the subsequent initial management strategy?

A 52-year-old man presents for follow-up at an outpatient clinic after an unprovoked generalized tonic-clonic seizure he experienced at home last week. He reports a long-standing history of episodic tension-type headaches, but notes a significant recent increase in their frequency and intensity over the past two months, which are no longer well-controlled with over-the-counter analgesics. He denies any history of prior seizures, head trauma, or illicit drug use. His past medical history is otherwise unremarkable. He is a non-smoker and consumes alcohol socially. His vital signs today are: temperature 36.8 C, blood pressure 128/82 mmHg, pulse 78/min, respirations 16/min, and oxygen saturation 99% on room air. Neurological examination reveals intact cranial nerves, normal motor strength and sensation bilaterally, and a steady gait. Reflexes are symmetric and normal. A previous head computed tomography (CT) scan performed in the emergency department revealed an extra-axial, well-circumscribed mass in the parasagittal region, demonstrating a broad dural base, as shown in the provided imaging. Considering his presentation and imaging findings, what is the most likely diagnosis and the appropriate initial management strategy?

A 45-year-old woman presents to a general medical clinic with a several-month history of progressive facial hair growth, requiring daily shaving, and a deepening of her voice. She reports a recent onset of irregular menstrual cycles after years of normal menses. Her medical history includes well-controlled hypertension, obesity, and type 2 diabetes managed with metformin, and a history of generalized anxiety. Her vital signs today are: temperature 37.2°C, blood pressure 158/105 mmHg, pulse 88/min, respirations 16/min, and oxygen saturation 98% on room air. Physical examination reveals significant hirsutism on the chin, upper lip, and chest, along with temporal balding. Clitoral enlargement is noted. Her abdominal examination is notable for central obesity. Cardiopulmonary exam is unremarkable. Due to the rapid progression of symptoms and virilization, an abdominal CT scan was performed which identified a 4.5 cm solid mass in the left adrenal gland. Given these findings, which of the following represents the most likely diagnosis and the critical next step in management?

A 48-year-old man, with a history of controlled hypertension, is referred to a surgical clinic due to a progressively enlarging anterior neck swelling noticed over the past eight months. He reports an unintentional weight loss of 5 kg over the last few months, attributing it to a general decrease in appetite, and occasionally feels a sensation of pressure in his throat, especially when swallowing larger food items. He denies any hoarseness, difficulty breathing, or significant changes in bowel habits. On examination, his vital signs are stable: temperature 36.8°C, pulse 72/min, blood pressure 138/78 mmHg, respirations 14/min, and oxygen saturation 99% on room air. A firm, non-tender nodule measuring approximately 2.5 cm is palpable in the right lobe of the thyroid, which freely moves with deglutition. No cervical lymphadenopathy or tracheal deviation is observed. A previous ultrasound of the neck described a solitary solid nodule in the right thyroid lobe with suspicious features, and an ultrasound-guided fine-needle aspiration (FNA) confirmed the presence of malignant cells consistent with papillary thyroid carcinoma. Considering the most likely diagnosis, what is the most appropriate initial surgical approach and a potential post-operative complication?

A 72-year-old man presents to the emergency department with a 36-hour history of progressively worsening bilateral lower extremity weakness and numbness, accompanied by new-onset urinary retention. He has a known history of metastatic prostate cancer with osseous involvement. His current vital signs are: temperature 37.00C, blood pressure 138/85 mmHg, pulse 78/min, respirations 16/min, and oxygen saturation 97% on room air. Physical examination reveals 3/5 motor strength in both lower extremities, diminished sensation below the T10 dermatome, saddle anesthesia, and hyperreflexia with bilateral Babinski signs. Imaging findings confirm significant spinal cord compression at the thoracic level. Considering this acute neurological decline, what is the immediate pharmacological intervention and a critical potential long-term neurological outcome if not promptly managed?

A 72-year-old male is admitted to the general medicine service after experiencing a new-onset generalized tonic-clonic seizure. His spouse reports he has been increasingly lethargic and irritable over the past few months, alongside persistent, dull headaches that are worse with coughing or bending over. He has also had several episodes of non-bilious vomiting in the last two weeks, which he attributes to his diet. His medical history includes well-controlled hypertension and dyslipidemia. On examination, he is oriented to person, place, and time but appears fatigued. His vital signs are stable: temperature 36.80C, blood pressure 130/85 mmHg, pulse 68/min, respirations 14/min. Neurological examination reveals mild left-sided pronator drift and bilateral papilledema on fundoscopy. Reflexes are symmetric, and sensory examination is intact. Imaging studies have been initiated, and his CT scan findings are presented in Figure A. Which of the following represents the most likely diagnosis and the appropriate initial management strategy?