Clinical history: 65 year old female with hysterectomy for prolapsed. Incidental 0.5 cm nodule found on uterine serosa.
What is the diagnosis?
You are seeing a well circumscribed nodule composed of glands lined by low columnar cells. There is no desmoplastic response to these glands, although there is some cellular atypia. This is most likely to be an adenomatoid tumor, although Immunohistochemistry may be requested to confirm the diagnosis.
Things you should be able to rhyme off about an Adenomatoid Tumor:
Common benign serosal tumor
Most often arises on the serosal surface of the uterus or fallopian tubes
Usually forms a 1-2 cm well circumscribed nodule
Micro: tubular and slit like spaces lined by a single layer of flattened cuboidal cells with bland cytology