OSU Department of Pathology

Anatomical Pathology Interesting Case Conference

Date of Presentation:10/19/2026

Attending pathologist:Anil Parwani, MD, PhD, MBA

Presented by:Mounika Vallakati, MBBS

Prepared by:Mounika Vallakati, MBBS

Organ:testes

HISTORY:

Male patient in his 30s

Known history of a teratoma

Multiple metastatic sites are noted

Retroperitoneal mass

Microscopic image possibly detecting cancerous areas in human tissue
Microscopic image possibly detecting cancerous areas in human tissue
Microscopic image possibly detecting cancerous areas in human tissue
Microscopic image possibly detecting cancerous areas in human tissue
Microscopic image possibly detecting cancerous areas in human tissue

What is the most likely diagnosis?

  1. Ewing Sarcoma
  2. Immature teratoma
  3. Other small cell carcinoma
  4. Embryonal carcinoma
  5. Embryonic – type Neuroectodermal tumor arising in a metastatic teratoma
Embryonic – type Neuroectodermal tumor arising in a metastatic teratoma

Case Summary