A patient presents to the primary care clinic complaining of a dry cough, dyspnea, chest pain, fever, fatigue, anorexia, weight loss, chills, and night sweats. The advanced practice registered nurse (APRN) notes the following: bilateral hilar lymphadenopathy and parenchymal interstitial infiltrates on CXR; elevated serum level of angiotensin-converting enzyme; elevated erythrocyte sedimentation rate. Which diagnosis should the APRN suspect?

While Hodgkin's lymphoma can present with similar systemic symptoms such as fever, weight loss, and night sweats, it typically involves lymphadenopathy that is not exclusively hilar and does not usually cause elevated angiotensin-converting enzyme levels. Moreover, the presence of interstitial infiltrates is more characteristic of sarcoidosis than lymphoma.

Systemic lupus erythematosus (SLE) can cause respiratory symptoms and systemic manifestations, but it usually presents with a combination of other specific signs, such as a characteristic rash or joint pain, and does not typically show elevated angiotensin-converting enzyme levels. The clinical presentation here is more suggestive of sarcoidosis.

Pulmonary hypertension can result in dyspnea and chest pain but is not associated with the systemic symptoms of fever, weight loss, and night sweats. It also does not correlate with the findings of elevated angiotensin-converting enzyme or erythrocyte sedimentation rate, which point towards an inflammatory or granulomatous disease like sarcoidosis.