Complications
- Potential complications that may be associated with AC can be subclassified as follows:
- Local tumor invasion, including the potential for tumor thrombus formation, which can embolize similar to renal cell carcinoma
- Hormone excess syndromes (eg, Cushing syndrome, hyperaldosteronism, hirsutism, virilization, and hypertension)
- Paraneoplastic syndromes (eg, cachexia)
- Local pain in patients with bone metastases
Prognosis
- Detection of tumors at early clinical stage is crucial for curative resection.
- Total resection offers the only prospect for cure.
- A majority of cases of AC are metastatic at the time of diagnosis. The most common sites of spread are the local periadrenal tissue, lymph nodes, lungs, liver, and bone.
- Patients with functional AC may have a better prognosis because they present earlier, unlike patients with nonfunctional variants, who invariably present when the tumors are very large or are associated with distant metastasis.
- Estimates of the overall 5-year survival rate are approximately 20-35%.
- For cases where total surgical resection is achieved, this rate is estimated to be approximately 32-47%.
- In those cases where total surgical extirpation has not been possible, the 5-year survival rates are 10-30%.
- Even after apparently complete surgical resection, local or distant relapse occurs in nearly 80% of cases.
- Estrogen receptor (ER) negative status confers a worse prognosis in adrenocortical carcinoma. In a study of 17 patients, Shen et al found that 1- and 5-year survival rates were 86% and 60%, respectively, for patients with ER-positive tumors, versus 38% and 0% for those with ER-negative tumors (P< 0.05).[18]
- The presence of distant metastasis generally is a sign of an especially poor outcome. Estimates suggest that as many as 50% of such patients are dead within 12 months of detecting the metastatic deposits, regardless of treatment.
- The most important predictive clinical parameters of prognosis are disease stage at diagnosis, completeness of resection at surgery, and presence or absence of metastasis at the time of diagnosis.
- Recent follow-up data from large centers, such as the MD Anderson Cancer Center, Memorial Sloan-Kettering Cancer Center, and the French association of Endocrine Surgery series from Europe, suggest a temporal improvement in clinical survival of patients with AC in more recent years since the late 1980s and early 1990s.
- Although still somewhat controversial, some suggest that children with AC have a better prognosis than adults. Favorable clinical outcome has been reported in 70% or more of pediatric cases.[19]
- Even for patients with curative surgery, life-long follow-up is mandatory because documented cases exist of AC recurrence more than 10 years after presumed curative surgery.
- Recurrent or relapsing AC is usually a bad omen. Although symptoms of hormonal excess can often be medically managed in this setting, cure is virtually unknown, and finding metastatic disease gives a particularly poor prognosis. Most of these patients die within 1 year. The prognosis is better in children, in whom some cases of long-term survival have been described.
- The prognosis for cases of AC occurring in pregnancy is equally grim; however, the fetal prognosis in these cases remains excellent.
- Patients who show no response to mitotane or who relapse are probably best served by a referral a major cancer center, where they can be enrolled in one of several ongoing combination chemotherapeutic/radiation and/or surgical resection protocols. AC is too uncommon for most tertiary hospitals to have enough expertise to manage these patients adequately.
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