Adrenocortical carcinoma

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Adrenocortical carcinoma
Other namesAdrenal cortical carcinoma, adrenocorticocarcinoma, adrenal cortical cancer, adrenal cortex cancer
Adrenal cortical carcinoma - low mag.jpg
Micrograph of an adrenocortical carcinoma (left of image – dark blue) and the adrenal cortex it arose from (right-top of image – pink/light blue). Benign adrenal medulla is present (right-middle of image – gray/blue). H&E stain.
Specialty Oncology

Adrenocortical carcinoma (ACC) is an aggressive cancer originating in the cortex (steroid hormone-producing tissue) of the adrenal gland.

Contents

Adrenocortical carcinoma is remarkable for the many hormonal syndromes that can occur in patients with steroid hormone-producing ("functional") tumors, including Cushing's syndrome, Conn syndrome, virilization, and feminization. Adrenocortical carcinoma has often invaded nearby tissues or metastasized to distant organs at the time of diagnosis, and the overall 5-year survival rate is about 50%. [1]

Adrenocortical carcinoma is a rare tumor, with incidence of one to two per million population annually. [2] [3] [4] [5] [6] It has a bimodal distribution by age, with cases clustering in children under 5 and in adults 30–40 years old. [5] The widely used angiotensin-II-responsive steroid-producing cell line H295R was originally isolated from a tumor diagnosed as adrenocortical carcinoma. [7] [8]

Signs and symptoms

Adrenocortical carcinoma may present differently in children and adults. Most tumors in children are functional, and virilization is by far the most common presenting symptom(s), followed by Cushing's syndrome and precocious puberty. [5] Among adults presenting with hormonal syndromes, Cushing's syndrome alone is most common, followed by mixed Cushing's and virilization (glucocorticoid and androgen overproduction). Feminization and Conn syndrome (mineralocorticoid excess) occur in less than 10% of cases. Rarely, pheochromocytoma-like hypersecretion of catecholamines has been reported in adrenocortical cancers. [9] Nonfunctional tumors (about 40%, authorities vary) usually present with abdominal or flank pain, varicocele, and renal vein thrombosis [10] or they may be asymptomatic and detected incidentally. [6]

All patients with suspected ACC should be carefully evaluated for signs and symptoms of hormonal syndromes. For Cushing's syndrome (glucocorticoid excess), these include weight gain, muscle wasting, purple lines on the abdomen, a fatty "buffalo hump" on the neck, a "moon-like" face, and thinning, fragile skin. Virilism (androgen excess) is most obvious in women, and may produce excess facial and body hair, acne, enlargement of the clitoris, deepening of the voice, coarsening of facial features, cessation of menstruation. Conn syndrome (mineralcorticoid excess) is marked by high blood pressure, which can result in headache and hypokalemia (low serum potassium, which can in turn produce muscle weakness, confusion, and palpitations), low plasma renin activity, and high serum aldosterone. Feminization (estrogen excess) is most readily noted in men, and includes breast enlargement, decreased libido, and impotence. [5] [6] [11]

Pathophysiology

The main etiologic factor of ACC is unknown, although families with Li–Fraumeni syndrome, caused by an inherited inactivation mutation in TP53 , have increased risk. Several genes have been shown to be recurrently mutated, including TP53, CTNNB1 , MEN1 , PRKAR1A , RPL22 , and DAXX . [12] [13] The telomerase gene TERT is often amplified while ZNRF3 and CDKN2A are often homozygously deleted. [13] The genes h19, insulin-like growth factor II (IGF-II), and p57kip2 are important for fetal growth and development. They are located on chromosome 11p. Expression of the h19 gene is markedly reduced in both nonfunctioning and functioning adrenal cortical carcinomas, especially in tumors producing cortisol and aldosterone. Also, a loss occurs of activity of the p57kip2 gene product in virilizing adenomas and adrenal cortical carcinomas. In contrast, IGF-II gene expression has been shown to be high in adrenal cortical carcinomas. Finally, c-myc gene expression is relatively high in neoplasms, and it is often linked to poor prognosis. [14]

Bilateral adrenocortical tumors are less common than unilateral. The majority of bilateral tumours can be distinguished according to size and aspect of the nodules: primary pigmented nodular adrenocortical disease, which can be sporadic or part of Carney complex, and primary bilateral macro nodular adrenal hyperplasia.[ citation needed ] Metastasis is most commonly to the liver and lung. [15]

Diagnosis

Laboratory findings

Hormonal syndromes should be confirmed with laboratory testing. Laboratory findings in Cushing syndrome include increased serum glucose (blood sugar) and increased urine cortisol. Adrenal virilism is confirmed by the finding of an excess of serum androstenedione and dehydroepiandrosterone. Findings in Conn syndrome include low serum potassium, low plasma renin activity, and high serum aldosterone. Feminization is confirmed with the finding of excess serum estrogen.[ citation needed ]

Imaging

Radiological studies of the abdomen, such as CT scans and magnetic resonance imaging are useful for identifying the site of the tumor, differentiating it from other diseases, such as adrenocortical adenoma, and determining the extent of invasion of the tumor into surrounding organs and tissues. On CT, it shows heterogeneous appearance due to necrosis, calcifications, and haemorrhage. After contrast injection, it shows peripheral enhancement. Invasion of adjacent structures such as kidney, vena cava, liver, and retroperitoneal lymph nodes are also common. [16]

On MRI, it shows low intensity on T1-weighted images, and high T2 signal with strong heterogeneous contrast enhancement and slow washout. Haemorrhagic areas may show high T1-signal. [16]

Pathology

Gross view of a large ACC Adrenal cortical carcinoma.JPG
Gross view of a large ACC
Cell-block preparation from a fine-needle aspiration biopsy of a large ACC shows tumor cells with compact, eosinophilic cytoplasm and a mild degree of nuclear pleomorphism. Adrenal cortical carcinoma.jpg
Cell-block preparation from a fine-needle aspiration biopsy of a large ACC shows tumor cells with compact, eosinophilic cytoplasm and a mild degree of nuclear pleomorphism.

Adrenal tumors are often not biopsied prior to surgery, so diagnosis is confirmed on examination of the surgical specimen by a pathologist. Grossly, ACCs are often large, with a tan-yellow cut surface, and areas of hemorrhage and necrosis. On microscopic examination, the tumor usually displays sheets of atypical cells with some resemblance to the cells of the normal adrenal cortex. The presence of invasion and mitotic activity help differentiate small cancers from adrenocortical adenomas. [9] Several relatively rare variants of ACC include:[ citation needed ]

Differential diagnosis

Incidences and prognoses of adrenal tumors, with adrenocortical carcinoma at top. Incidences and prognoses of adrenal tumors.png
Incidences and prognoses of adrenal tumors, with adrenocortical carcinoma at top.

Differential diagnosis includes: [ citation needed ]

Adrenocortical carcinomas are most commonly distinguished from adrenocortical adenomas (their benign counterparts) by the Weiss system, [2] as follows: [18]

Characteristic [18] Score
High nuclear grade (enlarged, oval to lobated, with coarsely granular to hyperchromatic chromatin and easily discernible, prominent nucleoli) [19] 1
More mitoses than 5/50 high power fields1
Atypical mitoses1
Eosinophilic cytoplasm in >75% of tumor cells1
Diffuse architecture of >33% of tumor1
Necrosis1
Venous invasion1
Sinusoidal invasion (no smooth muscle in wall)1
Capsular invasion1

Total score indicates: [18]

Treatment

The only curative treatment is complete surgical excision of the tumor, which can be performed even in the case of invasion into large blood vessels, such as the renal vein or inferior vena cava. The 5-year survival rate after successful surgery is 50–60%, but unfortunately, many patients are not surgical candidates. A 2018 systematic review suggests that laparoscopic retroperotenial adrenalectomy appears to reduce late morbidity, time to oral fluid or food intake and time to ambulation when compared to laparoscopic transperitoneal adrenalectomy, however there is uncertainty about these effects due to very low-quality evidence. [20] For outcomes such as all-cause mortality, early morbidity, socioeconomic effects, and operative and postoperative parameter, the evidence is uncertain about the effects of either interventions over the other. [20]

Radiation therapy and radiofrequency ablation may be used for palliation in patients who are not surgical candidates. [5] Minimally invasive surgical techniques remain controversial due to the absence of long-term data, with a particular concern for rates of recurrence and peritoneal carcinomatosis.[ citation needed ]

Chemotherapy regimens typically include the drug mitotane, an inhibitor of steroid synthesis, which is toxic to cells of the adrenal cortex, [4] [21] as well as standard cytotoxic drugs. A retrospective analysis showed a survival benefit for mitotane in addition to surgery when compared to surgery alone. [22]

The two most common regimens are cisplatin, doxorubicin, etoposide (EDP) + mitotane, and streptozotocin + mitotane. The FIRM-ACT trial demonstrated higher rates of response and longer progression-free survival with EDP + mitotane than with streptozotocin + mitotane. [23]

Prognosis

ACC, generally, carries a positive prognosis, [24] with an overall 5-year survival rate of about 50%. [1] Five-year disease-free survival for a complete resection of a stage I–III ACC is about 30%. [24] The most important prognostic factors are age of the patient and stage of the tumor. Poor prognostic factors include mitotic activity, venous invasion, weight of 50 g or more, diameter of 6.5 cm or more, Ki-67/MIB1 labeling index of 4% or more, and p53 positive.[ citation needed ]

In its malignancy, adrenocortical carcinoma is unlike most tumours of the adrenal cortex, which are benign (adenomas) and only occasionally cause Cushing's syndrome.[ citation needed ]

Related Research Articles

<span class="mw-page-title-main">Adrenal gland</span> Endocrine gland

The adrenal glands are endocrine glands that produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol. They are found above the kidneys. Each gland has an outer cortex which produces steroid hormones and an inner medulla. The adrenal cortex itself is divided into three main zones: the zona glomerulosa, the zona fasciculata and the zona reticularis.

<span class="mw-page-title-main">Adrenocorticotropic hormone</span> Pituitary hormone

Adrenocorticotropic hormone is a polypeptide tropic hormone produced by and secreted by the anterior pituitary gland. It is also used as a medication and diagnostic agent. ACTH is an important component of the hypothalamic-pituitary-adrenal axis and is often produced in response to biological stress. Its principal effects are increased production and release of cortisol and androgens by the cortex and medulla of the adrenal gland, respectively. ACTH is also related to the circadian rhythm in many organisms.

<span class="mw-page-title-main">Cushing's syndrome</span> Symptoms from excessive exposure to glucocorticoids such as cortisol

Cushing's syndrome is a collection of signs and symptoms due to prolonged exposure to glucocorticoids such as cortisol. Signs and symptoms may include high blood pressure, abdominal obesity but with thin arms and legs, reddish stretch marks, a round red face due to facial plethora, a fat lump between the shoulders, weak muscles, weak bones, acne, and fragile skin that heals poorly. Women may have more hair and irregular menstruation. Occasionally there may be changes in mood, headaches, and a chronic feeling of tiredness.

<span class="mw-page-title-main">Adrenal cortex</span> Cortex of the adrenal gland

The adrenal cortex is the outer region and also the largest part of the adrenal gland. It is divided into three separate zones: zona glomerulosa, zona fasciculata and zona reticularis. Each zone is responsible for producing specific hormones. It is also a secondary site of androgen synthesis.

Cushing's disease is one cause of Cushing's syndrome characterised by increased secretion of adrenocorticotropic hormone (ACTH) from the anterior pituitary. This is most often as a result of a pituitary adenoma or due to excess production of hypothalamus CRH that stimulates the synthesis of cortisol by the adrenal glands. Pituitary adenomas are responsible for 80% of endogenous Cushing's syndrome, when excluding Cushing's syndrome from exogenously administered corticosteroids. The equine version of this disease is Pituitary pars intermedia dysfunction.

<span class="mw-page-title-main">Primary aldosteronism</span> Medical condition

Primary aldosteronism (PA), also known as primary hyperaldosteronism, refers to the excess production of the hormone aldosterone from the adrenal glands, resulting in low renin levels and high blood pressure. This abnormality is caused by hyperplasia or tumors. About 35% of the cases are caused by a single aldosterone-secreting adenoma, a condition known as Conn's syndrome.

<span class="mw-page-title-main">Hyperandrogenism</span> Medical condition

Hyperandrogenism is a medical condition characterized by high levels of androgens. It is more common in women than men. Symptoms of hyperandrogenism may include acne, seborrhea, hair loss on the scalp, increased body or facial hair, and infrequent or absent menstruation. Complications may include high blood cholesterol and diabetes. It occurs in approximately 5% of women of reproductive age.

<span class="mw-page-title-main">Aminoglutethimide</span> Group of stereoisomers

Aminoglutethimide (AG), sold under the brand names Elipten, Cytadren, and Orimeten among others, is a medication which has been used in the treatment of seizures, Cushing's syndrome, breast cancer, and prostate cancer, among other indications. It has also been used by bodybuilders, athletes, and other men for muscle-building and performance- and physique-enhancing purposes. AG is taken by mouth three or four times per day.

Nelson's syndrome is a disorder that occurs in about one in four patients who have had both adrenal glands removed to treat Cushing's disease. In patients with pre-existing adrenocorticotropic hormone (ACTH)-secreting pituitary adenomas, loss of adrenal feedback following bilateral adrenalectomy can trigger the rapid growth of the tumor, leading to visual symptoms and hyperpigmentation. The severity of the disease is dependent upon the effect of ACTH release on the skin, pituitary hormone loss from mass compression, as well as invasion into surrounding structures around the pituitary gland.

<span class="mw-page-title-main">Adrenalectomy</span> Surgical removal of adrenal glands

Adrenalectomy is the surgical removal of one or both adrenal glands. It is usually done to remove tumors of the adrenal glands that are producing excess hormones or is large in size. Adrenalectomy can also be done to remove a cancerous tumor of the adrenal glands, or cancer that has spread from another location, such as the kidney or lung. Adrenalectomy is not performed on those who have severe coagulopathy or whose heart and lungs are too weak to undergo surgery. The procedure can be performed using an open incision (laparotomy) or minimally invasive laparoscopic or robot-assisted techniques. Minimally invasive techniques are increasingly the gold standard of care due to shorter length of stay in the hospital, lower blood loss, and similar complication rates.

<span class="mw-page-title-main">Mitotane</span> Chemical compound

Mitotane, sold under the brand name Lysodren, is a steroidogenesis inhibitor and cytostatic antineoplastic medication which is used in the treatment of adrenocortical carcinoma and Cushing's syndrome. It is a derivative of the early insecticide DDT and an isomer of p,p'-DDDTooltip dichlorodiphenyldichloroethane (4,4'-dichlorodiphenyldichloroethane) and is also known as 2,4'-(dichlorodiphenyl)-2,2-dichloroethane (o,p'-DDD).

In humans and other animals, the adrenocortical hormones are hormones produced by the adrenal cortex, the outer region of the adrenal gland. These polycyclic steroid hormones have a variety of roles that are crucial for the body’s response to stress, and they also regulate other functions in the body. Threats to homeostasis, such as injury, chemical imbalances, infection, or psychological stress, can initiate a stress response. Examples of adrenocortical hormones that are involved in the stress response are aldosterone and cortisol. These hormones also function in regulating the conservation of water by the kidneys and glucose metabolism, respectively.

Pseudo-Cushing's syndrome or non-neoplastic hypercortisolism is a medical condition in which patients display the signs, symptoms, and abnormal cortisol levels seen in Cushing's syndrome. However, pseudo-Cushing's syndrome is not caused by a problem with the hypothalamic-pituitary-adrenal axis as Cushing's is; it is mainly an idiopathic condition, however a cushingoid appearance is sometimes linked to excessive alcohol consumption. Elevated levels of total cortisol can also be due to estrogen found in oral contraceptive pills that contain a mixture of estrogen and progesterone. Estrogen can cause an increase of cortisol-binding globulin and thereby cause the total cortisol level to be elevated.

<span class="mw-page-title-main">Endocrine disease</span> Medical condition

Endocrine diseases are disorders of the endocrine system. The branch of medicine associated with endocrine disorders is known as endocrinology.

<span class="mw-page-title-main">Adrenal tumor</span> Medical condition

An adrenal tumor or adrenal mass is any benign or malignant neoplasms of the adrenal gland, several of which are notable for their tendency to overproduce endocrine hormones. Adrenal cancer is the presence of malignant adrenal tumors, and includes neuroblastoma, adrenocortical carcinoma and some adrenal pheochromocytomas. Most adrenal pheochromocytomas and all adrenocortical adenomas are benign tumors, which do not metastasize or invade nearby tissues, but may cause significant health problems by unbalancing hormones.

Hormonal therapy in oncology is hormone therapy for cancer and is one of the major modalities of medical oncology, others being cytotoxic chemotherapy and targeted therapy (biotherapeutics). It involves the manipulation of the endocrine system through exogenous or external administration of specific hormones, particularly steroid hormones, or drugs which inhibit the production or activity of such hormones. Because steroid hormones are powerful drivers of gene expression in certain cancer cells, changing the levels or activity of certain hormones can cause certain cancers to cease growing, or even undergo cell death. Surgical removal of endocrine organs, such as orchiectomy and oophorectomy can also be employed as a form of hormonal therapy.

<span class="mw-page-title-main">Adrenocortical adenoma</span> Medical condition

An adrenocortical adenoma or adrenal adenoma is commonly described as a benign neoplasm emerging from the cells that comprise the adrenal cortex. Like most adenomas, the adrenocortical adenoma is considered a benign tumor since the majority of them are non-functioning and asymptomatic. Adrenocortical adenomas are classified as ACTH-independent disorders, and are commonly associated with conditions linked to hyperadrenalism such as Cushing's syndrome (hypercortisolism) or Conn's syndrome (hyperaldosteronism), which is also known as primary aldosteronism. In addition, recent case reports further support the affiliation of adrenocortical adenomas with hyperandrogenism or florid hyperandrogenism which can cause hyperandrogenic hirsutism in females. "Cushing's syndrome" differs from the "Cushing's disease" even though both conditions are induced by hypercortisolism. The term "Cushing's disease" refers specifically to "secondary hypercortisolism" classified as "ACTH-dependent Cushing's syndrome" caused by pituitary adenomas. In contrast, "Cushing's syndrome" refers specifically to "primary hypercortisolism" classified as "ACTH-independent Cushing's syndrome" caused by adrenocortical adenomas.

<span class="mw-page-title-main">Adrenal gland disorder</span> Medical condition

Adrenal gland disorders are conditions that interfere with the normal functioning of the adrenal glands. Your body produces too much or too little of one or more hormones when you have an adrenal gland dysfunction. The type of issue you have and the degree to which it affects your body's hormone levels determine the symptoms.

<span class="mw-page-title-main">Linsitinib</span> Chemical compound

Linsitinib is an experimental drug candidate for the treatment of various types of cancer. It is an inhibitor of the insulin receptor and of the insulin-like growth factor 1 receptor (IGF-1R). This prevents tumor cell proliferation and induces tumor cell apoptosis.

<span class="mw-page-title-main">Adrenalism</span>

Adrenalism describes the condition of an excessive or substandard secretion of hormones related to the adrenal glands, which are found directly superior to the kidneys. Adrenalism can be further distinguished as hyperadrenalism, referring to the excessive secretion of hormones, and hypoadrenalism, referring to the insufficient secretion of hormones.

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