Inguinal Canal

The inguinal canal is a short passageway in the lower abdominal wall, located in the groin, that runs from inside the abdomen to the outside of the body. In men it carries the spermatic cord, and in women it carries the round ligament of the uterus. Because it is a natural weak point in the abdominal wall, it is a common site for hernias and, in rare cases, a route along which abdominal disease can extend into the groin or scrotum.

Origin

The word "inguinal" comes from the Latin inguen, meaning "groin." Anatomists have described the structure since the Renaissance, and detailed surgical anatomy of the canal was refined in the 19th century by surgeons such as Franz Hesselbach and Astley Cooper, whose names remain attached to nearby landmarks.

Significance in Asbestos Context

For patients with peritoneal mesothelioma, the inguinal canal can be clinically important in two ways. First, a new inguinal hernia in someone with known or suspected asbestos exposure can occasionally be the first sign of peritoneal disease, because tumor or fluid in the abdomen can push tissue through the canal; pathology from a routine hernia repair has, in some cases, returned a mesothelioma diagnosis. Second, tumor cells can track along the canal and present as a groin or scrotal mass (sometimes mimicking a simple hernia or hydrocele), which affects staging, surgical planning, and how complete a cytoreduction surgeon believes is possible.

Example Sentence

After his hernia repair, the surgeon sent the sac tissue for pathology, and the report noted malignant cells extending into the inguinal canal, which prompted a referral to a peritoneal mesothelioma specialist.

Related Terms

Peritoneal Mesothelioma, Hernia Sac Pathology, Peritoneum, Cytoreductive Surgery, Hydrocele, Tunica Vaginalis

Notes

• If you are scheduled for hernia surgery and have any history of asbestos exposure, ask the surgeon in writing to send the hernia sac and any fluid for pathology rather than discarding it.
• Request copies of all operative reports and pathology slides from prior hernia or hydrocele repairs; these can be re-reviewed by a mesothelioma pathologist and may establish an earlier date of disease.
• A new groin lump, scrotal swelling, or recurrent hernia in someone with prior asbestos exposure warrants imaging (CT or MRI of the abdomen and pelvis) rather than watchful waiting.
• Tell your oncology team about any past groin surgeries, because tumor along the inguinal canal can change staging and influence whether you are a candidate for cytoreductive surgery with HIPEC.