Porphyria cutanea tarda (PCT)

-Suspect PCT in patients who present with blistering lesions on sun-exposed skin. -Risk Factors: Things that cause liver damage (e.g. as alcohol use and hepatitis C); also smoking, estrogen use, HIV infection, and HFE mutations. Initial diagnostic test: total serum,...

Solitary Pulmonary Nodule

-“Management is based on the size of the nodule and the probability of malignancy.” -Risk factors for lung cancer. “Radiologic features indicative of malignancy include a nodule diameter >10 mm, an upper lung location, irregular or spiculated...