This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spread (Carcinoma Ovary), Subject name: Gynaecology & Obstetrics
Krukenberg tumour is most commonly from: 
Select and explain. 
A. Lung, B. Breast, C. Stomach, D. Colon
C: Stomach
Answer: C: Stomach 
Explanation: Ans: c (Stomach) Ref:Shaw, 13th ed, p. 401Krukenberg ovarian tumoursPrimary sites - Stomach (70%),Breast (6%),Colon (15%)Involvement of ovary by - Retrograde lymphaticsAlways bilateral with smooth surface.Maintaining the shape of ovaryNo tendency of adhesion (i.e. capsule remain intact).Histology: Signet ring cellsBRIDGE:signet ring cells are seen in Krukenberg tumour but sideroblasts are seen in v myelodysplatic syndrome.