Match each clinical presentation of an oncologic emergency with the most appropriate next … — USMLE Step 2 CK

Match each clinical presentation of an oncologic emergency with the most appropriate next step in management.

A patient with small cell lung cancer develops new-onset confusion and lethargy; laboratory studies reveal a serum sodium of $118$ mEq/L.Initiate fluid restriction and administer hypertonic saline if severe neurologic symptoms are present.
A patient undergoing induction chemotherapy for high-grade lymphoma develops acute oliguria, hyperkalemia, hyperphosphatemia, and hypocalcemia.Administer aggressive intravenous hydration along with a recombinant urate oxidase or xanthine oxidase inhibitor.
A patient with advanced squamous cell carcinoma of the lung presents with worsening lethargy, severe constipation, and a serum calcium level of $14.8$ mg/dL.Provide vigorous intravenous isotonic saline hydration followed by administration of calcitonin and a bisphosphonate.
A patient with non-small cell lung cancer presents with progressively worsening dyspnea, facial plethora, and prominent venous distention over the neck and chest.Elevate the head of the bed and prepare for urgent radiation therapy or endovascular stent placement.
A patient day $10$ post-chemotherapy presents with a temperature of $38.9^\circ$ C ( $102.0^\circ$ F) and an absolute neutrophil count of $300$ /mm $^3$ .Obtain blood cultures immediately and initiate empiric broad-spectrum intravenous antibiotics such as cefepime.

Cevap

The correct matches are: SIADH with fluid restriction and hypertonic saline; Tumor Lysis Syndrome with aggressive hydration and rasburicase or allopurinol; Hypercalcemia of malignancy with isotonic saline, calcitonin, and bisphosphonates; SVC syndrome with head elevation and radiation or stenting; and Febrile neutropenia with immediate blood cultures and broad-spectrum antibiotics.

Matching each oncologic emergency with its definitive initial management requires recognizing the underlying pathophysiology. SIADH requires sodium correction; Tumor Lysis Syndrome necessitates renal protection from uric acid and phosphate crystals; hypercalcemia demands aggressive rehydration to counter volume depletion; SVC syndrome needs mechanical or radiologic relief of venous obstruction; and febrile neutropenia requires immediate empiric antimicrobial coverage to prevent overwhelming sepsis.

Adım Adım Çözüm

Analyze the clinical and laboratory findings for the patient with small cell lung cancer.

Identify SIADH presenting with severe hyponatremia.

To determine the need for careful sodium correction via fluid restriction and hypertonic saline.

Evaluate the metabolic derangements in the patient receiving induction chemotherapy.

Recognize the classic electrolyte pattern of Tumor Lysis Syndrome.

To direct therapy towards massive hydration and uric acid reduction.

Assess the severe hypercalcemia in the context of squamous cell lung cancer.

Determine the critical necessity for immediate volume expansion.

To correct dehydration and facilitate renal calcium clearance before administering targeted therapies like bisphosphonates.

Identify the cause of facial plethora and venous distention in the lung cancer patient.

Diagnose Superior Vena Cava (SVC) syndrome.

To prioritize obstructive relief via radiation or endovascular stenting.

Recognize the urgency of a fever in a severely neutropenic patient.

Identify febrile neutropenia.

To emphasize the absolute need for immediate antipseudomonal antibiotic therapy without waiting for culture results.

Anahtar Kavram

Recognition and appropriate initial management of high-yield oncologic emergencies.

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