A 5-year-old boy is brought to the pediatrician for a physical examination prior to beginning elementary school. On examination, the boy has only one palpable testis in the scrotum. Fuher examination reveals a palpable mass in the left inguinal region. This condition is referred to as

**Core Concept**
Cryptorchidism, a condition where one or both testes fail to descend into the scrotum, is a common congenital anomaly. The presence of a palpable testis in the scrotum and a palpable mass in the inguinal region suggests a testis that has not descended, but is still present in the abdomen or inguinal canal.

**Why the Correct Answer is Right**
The correct term for this condition is **Undescended Testis**, which is a type of cryptorchidism. The undescended testis may be palpable in the inguinal canal or in the abdomen. This condition is often associated with an increased risk of testicular cancer and infertility. The presence of a palpable mass in the inguinal region suggests a testis that has not descended, but is still present in the abdomen or inguinal canal.

**Why Each Wrong Option is Incorrect**
**Option A:** **Ectopic Testis** refers to a testis that has descended, but is located in an abnormal position, such as in the femoral canal or in the thigh. This is not the correct term for a testis that has not descended.
**Option B:** **Testicular Torsion** is a condition where the spermatic cord becomes twisted, cutting off the blood supply to the testis. This is a medical emergency that requires immediate attention, but it is not related to an undescended testis.
**Option C:** **Varicocele** is a condition where the veins in the scrotum become enlarged, often causing a feeling of heaviness or swelling in the scrotum. This is not related to an undescended testis.

**Clinical Pearl / High-Yield Fact**
Undescended testis is a common congenital anomaly that requires prompt evaluation and treatment to prevent long-term complications such as infertility and testicular cancer. Early detection and treatment can significantly improve outcomes.

**Correct Answer:** D. Undescended Testis

✓ Correct Answer: A. Cryptorchidism.