Case Studies

A 32-year-old G1P0 woman has an initial type and screen at her first prenatal appointment. She is B positive and her antibody screen is negative.[...]

A 52-year-old woman presents with progressive numbness involving the right side of her face and tongue, diplopia, swallowing difficulty, and gait instability. She has an[...]

Mayo Clinic laboratory experts share five case studies in this month’s “PathWays” post and are challenging you to test your laboratory genetics & genomics, bone & soft tissue, renal, infectious disease, and gastroenterology pathology knowledge. Review the cases, take the quizzes, and learn how the correct diagnoses were made.

23-year-old male with an isolated soft tissue mass on the back measuring 1.5 cm.The mass is centered in the dermis and extending into the underlying[...]

A 39-year-old woman presents with a 6 cm recurrent polypoid mass situated in the left pharyngeal wall (piriform sinus), initially resected five years ago. Toshi[...]

A 59-year-old kidney transplant patient presented after 1 week of low-grade fevers and non-productive cough. A CT scan of the lungs showed multiple mass-like lesions[...]

A 68-year-old male with history of chronic lymphocytic leukemia presented with subnephrotic range proteinuria (protein/creatinine ratio of 2.5), hemoglobin (13.1 g/dl) and ESR of 50[...]

A 33-year-old female presents to her care team with liver cirrhosis (stage IV) and worsening liver failure. She is well known to her medical team[...]

A 5 year old male patient with a complex phenotype was seen in clinic. He presented with developmental delay, feeding difficulty, cerebellar malformation, coagulation problems,[...]

This case presents an unusual colon polyp on an asymptomatic early 70 year-old male. At the time of screening colonoscopy, two small left colon polyps were noted and excised. What is the diagnosis?