This article is part of a series describing and differentiating dermatologic lumps and bumps. In part 9, facial angiofibromas, ungual fibromas, and shagreen patch are described.
Sometimes a patient’s self-diagnosis can be helpful. On the other hand, a patient also can lead the diagnostician astray. The power of suggestion can cause the clinician to anchor on one part of the history or physical examination, a common heuristic error.
A 70-year-old man with a medical history significant for type 2 diabetes and hidradenitis suppurativa presented to the dermatology clinic with a pruritic and painful rash on the left posterior thigh. The rash first started 10 years prior to presentation and had numerous flares since onset, some of which included bullous lesions that persisted for days at a time.
What's Your Diagnosis?
A 66-year-old man was referred to the clinic for evaluation of cough, fevers, and rigors that had progressed over 10 days. His sputum was purulent but without hemoptysis.