Sacrococcygeal teratoma

What it means

A teratoma arising in the sacro-coccygeal region.

Sacrococcygeal teratomas arise from totipotent cells from the node of Hensen at the anterior aspect of the coccyx by about the 2nd to 3rd weeks of gestation, and are composed of the all three germ cells (i.e. ectoderm, mesoderm and endoderm). Sacrococcygeal teratomas are classified according to their relative extent outside and inside the body. Altman type I: entirely outside, sometimes attached to the body only by a narrow stalk; Altman type II: mostly outside; Altman type III: mostly inside; Altman type IV: entirely inside.

Rare diseases that can present with this4

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category