[Endoscopic excision of extra-adrenal pheochromocytomas (paragangliomas)]

[Minimally invasive surgery of retroperitoneal paragangliomas : Synopsis of personal experiences]

Retroperitoneal paragangliomas are rare tumors with the characteristics of adrenal pheochromocytomas. They may occur sporadically or in conjunction with hereditary syndromes. Diagnostic methods in paragangliomas include testing of catecholamine secretion and imaging procedures. The first choice treatment is surgical removal, which in the author's opinion is preferably by minimally invasive approaches. Infrarenal paragangliomas should be excised using a laparoscopic transabdominal procedure. For suprarenal tumors the retroperitoneoscopic approach should be used.

Posterior Retroperitoneoscopic Resection of Extra-adrenal Paraganglioma Located in the Aorto-caval Space

BACKGROUND

The posterior retroperitoneoscopic adrenalec tomy has several advantages compared with the transperitoneal approach such as a shorter and more direct route to the target organ, no breach of the intraperitoneal space, and no required retraction of the adjacent organs. It also is a safe procedure with a short learning curve.1^-5 This report presents a challenging case of an extra-adrenal paraganglioma located in the aorto-caval space and managed using the retroperitoneal approach.

METHODS

A 39-year-old man was placed in the prone jackknife position, and three incisions were made in the right posterior abdominal wall for placement of the laparoscopic ports. The retroperitoneal space was entered with diathermy and blunt finger dissection, and retropneumoperitoneum was achieved with carbon dioxide insufflation pressure up to 18 mmHg. After identification of the right kidney and vessels, the tumor was meticulously dissected and excised with an energy device. The specimen was removed using a laparoscopic specimen retrieval bag, and the port sites were closed in layers.

RESULTS

The operative time was 130 min, and the total blood loss was 30 ml. The tumor was diagnosed as a moderately differentiated extra-adrenal paraganglioma. The Von Hippel-Lindau gene mutation was detected using next-generation sequencing.

CONCLUSIONS

The posterior retroperitoneoscopic approach is a safe, feasible, and effective method for excising an extra-adrenal paraganglioma even in the aorto-caval space. The authors suggest that this procedure is a useful surgical option for treatment of an aorto-caval paraganglioma for selected patients and by experienced surgeons.

Retroperitoneoscopic adrenalectomy: lateral versus dorsal approach

BACKGROUND

For tumours of the adrenal gland different surgical retroperitoneal approaches have been established, including the lateral and the dorsal approach. It is still unclear if the lateral or the dorsal approach should be preferred.

PATIENTS AND METHODS

A retrospective comparison between 21 patients who underwent retroperitoneoscopic adrenalectomy in lateral position (LRA) and 24 patients who underwent a retroperitoneoscopic adrenalectomy in dorsal position (DRA).

RESULTS

There were no significant differences with regard to the age, sex, tumour localisation, and the size of the tumour. The body-mass-index as well as the operation time was significantly higher of patients who underwent surgery in lateral position. Complications were comparable in both groups.

CONCLUSION

The dorsal and the lateral retroperitoneal approach are ideal approaches for patients having had an intraabdominal surgery before. Due to the missing intraabdominal pressure the lateral approach is advantageous for patients with high body-mass-index (>35) and is indicated for patients with a tumour >6 cm due to the small retroperitoneal space.

Transperitoneal, Transmesocolic Approach for Laparoscopic Excision of an Extra-adrenal Pheochromocytoma

Laparoscopic surgery is an established treatment modality for adrenal disease, especially pheochromocytomas. We describe the successful excision of an extra-adrenal pheochromocytoma using a novel transperitoneal, transmesocolic approach. The tumor was located inferior to the left renal hilum in the para-aortic region and was found bulging through the descending mesocolon at laparoscopy. The tumor was removed without mobilization of the descending colon.