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2. Ridgling - Wikipedia

   en.wikipedia.org/wiki/Ridgling

   A ridgling (also spelled ridgeling), [1] or rig, is a cryptorchid; [2] a male animal with one or both testicles undescended, [1] usually describing a ram, bull, or male horse, [3] but cryptorchidism also can be an issue in dogs and cats. [4] Because the heat inside the body is too high for sperm to survive, an undescended testicle is non ...

3. Cryptorchidism - Wikipedia

   en.wikipedia.org/wiki/Cryptorchidism

   The risk of malignancy in the undescended testis is 4 to 10 ten times higher than that in the general population and is about one in 80 with a unilateral undescended testis and one in 40 to one in 50 for bilateral undescended testes. The peak age for this tumor is 15–45 years old.

4. Monorchism - Wikipedia

   en.wikipedia.org/wiki/Monorchism

   One testicle not descending into the scrotum during normal embryonic or fetal development (3–4% of 'normal' live births), also known as undescended testis or cryptorchidism. In this case the testis is within the abdominal cavity, somewhere along the normal route of descent – most commonly, within the inguinal canal .

5. Ectopic testis - Wikipedia

   en.wikipedia.org/wiki/Ectopic_testis

   The ectopic testis can be in the perineal region, the opposite side of the scrotum, the suprapubic region, the femoral region, or the superficial inguinal pouch. [1]The ectopic testis is initially normal, but if it is ignored after childhood, it may become small and soft, with spermatogenesis arresting and interstitial cell proliferation occurring.

6. Macroorchidism - Wikipedia

   en.wikipedia.org/wiki/Macroorchidism

   To determine the enlargement of testes (i.e., macroorchidism), the testes must be greater than the 95th percentile of the confidence interval in males after puberty. The 95th percentile means that a child's testicular size exceeds 95% of children similar in age. This rules out males with early puberty. Another symptom of macroorchidism is an ...

7. Polyorchidism - Wikipedia

   en.wikipedia.org/wiki/Polyorchidism

   However, polyorchidism can occur in conjunction with cryptorchidism, where the supernumerary testicle is undescended or found elsewhere in the body. These cases are associated with a significant increase in the incidence of testicular cancer: 0.004% for the general population vs 5.7% for a supernumerary testicle not found in the scrotum.