Multiple endocrine neoplasia type 1 differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ammu Susheela, M.D. [2]

Overview

Multiple endocrine neoplasia type 1 must be differentiated from other hereditary diseases such as von Hippel-Lindau syndrome, tuberous sclerosis, carney complex, neurofibromatosis type 1, Li-Fraumeni syndrome, multiple endocrine neoplasia type 2, familial hyperparathyroidism, pheochromocytoma and acromegaly.

Differential Diagnosis

Multiple endocrine neoplasia type 1 must be differentiated from the hereditary diseases shown in the table below.

Disease	Definition	Gene	Chromosome	Differentiating Features	Components of MEN
					Parathyroid	Pitutary	Pancreas
von Hippel-Lindau syndrome	autosomal dominant	Von Hippel–Lindau tumor suppressor	3p25.3	Angiomatosis,  Hemangioblastomas, Pheochromocytoma,  Renal cell carcinoma, Pancreatic cysts (pancreatic serous cystadenoma) Endolymphatic sac tumor, Bilateral papillary cystadenomas of the epididymis (men) or broad ligament of the uterus (women)			+
Carney complex	autosomal dominant	PRKAR1A	17q23-q24	Myxomas of the heart Hyperpigmentation of the skin (lentiginosis) Endocrine (ACTH-independent Cushing's syndrome due to primary pigmented nodular adrenocortical disease)	-	-	-
Neurofibromatosis type 1	autosomal dominant		17	scoliosis (curvature of the spine) Learning disabilities vision disorders Cutaneous lesions epilepsy.	-	-	-
Li-Fraumeni syndrome	autosomal dominant	TP53	17	Early onset of diverse amount of cancers such as sarcoma, cancers of breast brain adrenal glands	-	-	-
Gardner's syndrome	autosomal dominant	APC	5q21	Multiple polyps in the colon  Osteomas of the skull Thyroid cancer, Epidermoid cysts, Fibromas Desmoid tumors	-	-	-
Multiple endocrine neoplasia type 2	autosomal dominant disorder characterized by	RET		medullary thyroid carcinoma (MTC) pheochromocytoma Primary hyperparathyroidism	+	-	-
Cowden syndrome	A rare autosomal dominant disorder due to germline mutation of, a tumor suppressor gene characterized by multiple tumor-like growths called hamartomas.	PTEN
Cushing's syndrome	A disorder due to prolonged exposure to cortisol characterized by hypertension, abdominal obesity but with thin arms and legs, purple abdominal striae, moon facies, buffalo lump, weak muscles, weak bones, acne, and fragile skin that heals poorly.
Acromegaly/gigantism	A rare syndrome due to excess growth hormone characterized by enlargement of the hands, feet, nose, lips and ears, and a general thickening of the skin, hypertrichosis, hyperpigmentation and hyperhidrosis and carpal tunnel syndrome.
Hyperaldosteronism	A disorder due to excess production of the aldosterone by the adrenal glands characterized by hypertension, muscular weakness, muscle spasms, tingling sensations and excessive urination.
Pituitary adenoma	A tumor in pituitary gland characterized by visual field defects, classically bitemporal hemianopsia, increased intracranial pressure, migraine and lateral rectus palsy.
Hyperparathyroidism	A disorder due to excess production of parathyroid hormone characterized by kidney stones, hypercalcemia, constipation, peptic ulcers and depression.
Thyroid carcinoma	A tumor of the thyroid gland characterized by signs and symptoms of hyperthryroidism or hypothyroidism.
Pheochromocytoma/paraganglioma	A neuroendocrine tumor of the medulla of the adrenal glands characterized by episodic hypertension, palpitations, anxiety, diaphoresis and weight loss.
Adrenocortical carcinoma	An aggressive cancer originating in the cortex of the adrenal gland that may either by non-secretory (asymptomatic) or secretory with signs and symptoms of Cushing syndrome (cortisol hypersecretion), Conn syndrome (aldosterone hypersecretion), virilization (testosterone hypersecretion)
Adapted from Toledo SP, Lourenço DM, Toledo RA. A differential diagnosis of inherited endocrine tumors and their tumor counterparts, journal=Clinics (Sao Paulo), volume= 68, issue= 7, 07/24/2013