Germ cell tumor

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD's medical weight loss NYC, sleep center NYC
Philadelphia medical weight loss and Philadelphia sleep clinics

Germ cell tumor
Micrograph of a seminoma, a type of germ cell tumor
Synonyms	N/A
Pronounce	N/A
Specialty	N/A
Symptoms	Abdominal pain, testicular swelling, dyspnea
Complications	Infertility, metastasis
Onset	Typically in young adults
Duration	Variable
Types	Seminoma, non-seminomatous germ cell tumor
Causes	Genetic factors, cryptorchidism
Risks	Family history, Klinefelter syndrome
Diagnosis	Biopsy, tumor markers
Differential diagnosis	Lymphoma, testicular torsion
Prevention	None specific
Treatment	Surgery, chemotherapy, radiation therapy
Medication	Cisplatin, bleomycin, etoposide
Prognosis	Generally good with treatment
Frequency	Rare
Deaths	N/A

A germ cell tumor (GCT) is a type of neoplasm derived from germ cells. Germ cells are the reproductive cells of the body, and they are responsible for the production of spermatozoa in males and ova in females. Germ cell tumors can occur in the gonads (testes and ovaries) or in extragonadal sites such as the mediastinum, retroperitoneum, and the central nervous system.

Classification

Germ cell tumors are classified into two main types: seminoma and non-seminomatous germ cell tumors (NSGCTs).

Seminoma

Seminomas are a type of germ cell tumor that tend to grow slowly and are sensitive to radiation therapy. They are most commonly found in the testes but can also occur in extragonadal sites.

Non-seminomatous germ cell tumors

NSGCTs include a variety of tumor types such as embryonal carcinoma, yolk sac tumor, choriocarcinoma, and teratoma. These tumors tend to be more aggressive than seminomas and may require a combination of surgery, chemotherapy, and radiation therapy for treatment.

Epidemiology

File:Relative incidences of testicular tumors.png

Relative incidences of different types of testicular tumors.

Germ cell tumors are most commonly diagnosed in young adults, particularly between the ages of 15 and 35. They are more common in males than females, with testicular germ cell tumors being the most prevalent type in men.

Pathophysiology

Germ cell tumors arise from germ cells that fail to undergo normal differentiation and maturation. The exact cause of this abnormal development is not fully understood, but it is believed to involve a combination of genetic and environmental factors.

Clinical presentation

The symptoms of germ cell tumors vary depending on the location and type of the tumor. Testicular germ cell tumors often present as a painless mass in the testicle, while ovarian germ cell tumors may cause abdominal pain or swelling. Extragonadal germ cell tumors can cause symptoms related to the compression of nearby structures.

Diagnosis

Diagnosis of germ cell tumors typically involves a combination of imaging studies, serum tumor markers, and biopsy. Common tumor markers include alpha-fetoprotein (AFP), beta-human chorionic gonadotropin (β-hCG), and lactate dehydrogenase (LDH).

Treatment

The treatment of germ cell tumors depends on the type, stage, and location of the tumor. Seminomas are often treated with radiation therapy, while NSGCTs may require chemotherapy and surgical resection.

Prognosis

The prognosis for germ cell tumors is generally favorable, especially when detected early. Seminomas have a high cure rate with appropriate treatment, and many NSGCTs can also be successfully treated.

See also

• Testicular cancer
• Ovarian cancer
• Teratoma
• Embryonal carcinoma