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

Differential diagnosis of neck masses

Differential diagnosis of neck masses include:

Category	Diseases		Benign or Malignant	Clinical manifestation								Paraclinical findings			Gold standard diagnosis	Associated findings
				Demography	History	Symptoms		Signs				Lab findings	Histopathology	Imaging
						Pain	Dysphagia	Mass exam	Skin changes	LAP	Others
Congenital	Branchial cleft cyst		Benign	Age: 1-15 yrs/ varies Familial occurence is noted	Lateral neck mass	-	+/-	Solitary Smooth Mobile Welldefined Nonpulsatile Fluctuant	A pit is found at the opening of the cyst	-	-	-	Squamous or ciliated epithelial lining Lymphoid tissue with germinal centers and subcapsular sinuses	CT: Well defined fluid attenuation with slight enhancement of the capsule Ultrasound: Typical features of a cyst are seen		Brachio-oto-renal syndrome Sinus Fistula
	Thyroglossal duct cyst		Benign	Age: 1-10 yrs/ varies	Midline neck mass	-	-	Mobile Moves upwards with tongue protrusion and swallowing	-	-	-	-	Squamous or ciliated pseudostratified columnar lining Foci of thyroid gland tissue Granulation tissue or giant cells if it gets infected	Ultrasound: Anechoic, thin walls, and heterogeneous with internal septae CT with contrast: Well circumscribed,homogeneous fluid attenuation, thin enhancing rim MRI: T1- dark, T2-bright images		-
	Haemangioma		Benign	Age: birth - 2 yrs Females>males	Usually present with a flat red or purple patch	-	-	Firm Rubbery Well-demarcated	Blanching Telangiectasias Erythematous patch	-	-	GLUT-1 VEGF Urinary BFGF	Lined by non atypical endothelial cells Vascular structures with RBC	Ultrasound: High flow with vascular channels MRI: With or without Gd is the modality of choice		POEMS and Castleman's disease
	Vascular malformations
	Lymphatic malformations
	Laryngocele		Benign	More common in adults Male: female = 5:1	Present with a neck swelling, hoarseness, stridor and globus sensation Episodic in nature	-	+/-	Soft Reducible Increase in size on valsalva	-	-	Common in glass blowers, trumpet players	-	Lined by pseudostratified ciliated epithelium	X-ray, CT: Fluid and air containing cystic masses CT is the preferred one	CT scan is the gold standard imaging for diagnosis	-
	Ranula		Benign	Age: 1st and 2nd decade Female: male=1:1.4	Present with a blue colored swelling in the floor of the mouth	-	-	Well circumscribed Fluctuant Soft				-
	Teratoma			Incidence: 1:4000 births								High ALP levels
	Dermoid cyst		Benign	Incidence: 3 per 10000 population Age: birth - 5 yrs	Presents as a slow growing mass or a sinus	-	-	Freely mobile/Fixed Solitary Rubbery Nonpulsatile Noncompressible	Usually normal/sometimes a pit or sinus is seen A tuft of hair at the center of the pit for nasal dermoid cyst	-		-	Keratinizing squamous epithelium Occasional remnants of hair follicles,adipose tissue, and sweat glands	Ultrasound: Thin walled, unilocular CT: With contrast well circumscribed, unilocular, sac-of-marbles appearance due to fatty tissue
	Thymic cyst		Benign	Age: 1-10 yrs Males>Females	Presents as a soft mass, gradually enlarging, on left side of the neck(usual)	-	-	Soft Compressible		-		-	Squamous/cuboidal epithelium Lymphoid tissue in the cyst wall contains hassall corpuscles	Ultrasound: Unilocular cystic mass CT: Uni/multilocular, well circumscribed and nonenhancing
Category	Diseases		Benign or Malignant	Demography	History	Pain	Dysphagia	Mass exam	Skin changes	LAP	Others	Lab findings	Histopathology	Imaging	Gold standard diagnosis	Associated findings
Inflammatory	Acute sialadenitis		Benign	No sex predilection Occurs in all age groups	Presents with an unilateral erythematous swelling Bad breath Fever with chills	+	-	Tender Firm Purulent discharge expressed from the duct Smooth	Redness	+	More common in people with bad oral hygiene	↑ ESR Leukocytosis		Ultrasound: Hypoechoic with ductal dilatation CT: Diffuse homogeneous enlargement
	Chronic sialadenitis		Benign	No sex predilection Occurs in all age groups	Presents with an unilateral swelling Recurrent episodes common	+	-	Non-tender Firm Smooth			Mostly due to obstruction by a stone or stricture	↑ ESR Leukocytosis
	Reactive viral lymphadenopathy	CMV		Age: 10-35 yrs mainly No sex predilection	Flu-like illness	-	-	Non-tender Soft		Generalized/cervical			H&E stain: Typical owl-eye inclusions(nuclear) Basophilic cytoplasmic inclusions		FNAC & serology
		EBV		Age: Mainly adolescents Sex: No sex predilection	Sore throat Fever Malaise Lymphadenopathy	-	-	Non-tender Firm		B/L posterior cervical, axillary, inguinal		Atypical lymphocytosis + Monospot test IgM & IgG antibodies	CD8+ lymphocytes Tissue necrosis B lymphocyte blasts		FNAC & serology
		HIV			Flu-like illness Rash
		Viral URI
	Bacterial lymphadenopathy	Tularemia
		Brucellosis
		Cat-scratch disease
		Actinomycosis
		Mycobacterial infections
		Staphylococcal or streptococcal infection
	Parasitic lymphadenopathy	Toxoplasma gondii
	Sarcoidosis
	Amyloidosis
	Sjögren syndrome
	Castleman disease (angiofollicular lymphoproliferative disease)
	Kikuchi disease (histiocytic necrotizing lymphadenitis)
	Kimura disease
	Rosai-Dorfman disease
	Kawasaki disease
Category	Diseases		Benign or Malignant	Demography	History	Pain	Dysphagia	Mass exam	Skin changes	LAP	Others	Lab findings	Histopathology	Imaging	Gold standard diagnosis	Associated findings
Neoplasm	Primary thyroid tumor
	Salivary gland neoplasm	Pleomorphic adenoma	+
		Warthin's tumor	+
		Lymphoepithelioma	+
		Oncocytoma	Benign	Race: Caucasian patients predilection Gender: No gender preference Age: 50–70 years	Growing palpable painless mass Facial swelling Lymphadenopathy (if transformed to malignant)	+/-	+/-	Firm, multilobulated and mobile mass	Normal Redness Swelling Skin ulceration	-		Normal Anemia	Epithelial cells with eosinophilic granular cytoplasm rich in mitochondria	CT: Isodense expansive mass Enhancement after intravenous contrast Hypodense areas MRI: Isodensties on T1 Mass is hyperintense on T2 Enhancement on contrast	Incisional biopsy and histopathological examination
		Monomorphic adenoma	Benign or malignant	Age: From 26 to 76 years Rare in children Sex: No sex predilection	Growing palpable painless mass on jaw or in oral cavity Facial swelling Lymphadenopathy (if transformed to malignant) Pain and ulceration (in later stage)	+/-	+/-	Nodular and fluctuant swelling	Normal Redness Skin ulceration	+/-		Normal	Straw colored fluid on aspiration	Ultrasound: Used to biopsy the lesion May show cystic an solid components CT: useful for lesions with calcification and venous pleboliths MRI: Test of choice Differentiate benign from malignant Defines tumor extent Shows perineural spread	Incisional biopsy and histopathological examination
		Mucoepidermoid carcinoma	Malignant	Age:: Mean age of 59 Gender: Female predilection	Painlesss mass Swelling in oral cavity Lympadenopathy	+/-	+/-	Cystic and solid mass	Normal	+/-	Association with CMV		Gross findings: Firm Tan-white to yellow Bosselated Cystic Microscopic: Encapsulated squamous and glandular components	cystic and solid component with variable appearance	Incisional biopsy and histopathological examination
		Adenoid cystic carcinoma	Malignant	Age: 40s to 60s Gender: Female predominance	Slow growing painless mass	+/-	+/-	Solid mass	Normal to ulcerated lesions	+/-	Slow growing rare tumor with low recurrence		Gross: Tubular, cribriform and solid pattern of growrth Microscopic: Components of large cells with pleomorphic nuclei increased mitotic activity, and focial necrosis.	Imaging reveal dimensions of the tumor, local spread and distant metastasis	Biopsy and histopathological examination
		Adenocarcinoma	Malignant	Age: young age predilection	Its a tumor of minor salivary glands so may present as small ulceration or nodules in oral cavity	-	-	Small nodules and oral cavity with or without lymphadenopathy	Skin stays intact or may show some ulceration	+/-	There are several subtypes of adenocarcimoma. Some are more infiltrating in nature	Can be normal or may show anemia and blood cell disorders with distant bone invasion	On histology it is confused with Adeocyctic carcinoma with components of gland and cyst formations. It has more perineural invasion.	CT and MRI both can be used to visualize the tumor. MRI being more accurate for adjacent tissue involvement and lymphadenopathy.	Biopsy and histopathological examination
		Salivary duct carcinoma	Malignant (Highly aggressive)	Incidence: 1% to 3% Gender: Men Mean age: 55 to 61 years	Presents as rapidly growing mass	+/-	+/-	Painless, hard and non-compressible mass In case of facial nerve involvement may present with facial paralysis	Jaw involvement results in ulceration of mucosa and may cause ulceration of skin as well	+/-	Rapidly growing mass with jaw involvement and facial paralysis in case of facial nerve involvement	Pathomorphologically tumor of salivary ducts resembles tumor of breast ducts , and that where it name is derived from	Gross findings: Firm mass Cystic component of variable size and dimension Microscopic finding: Microscopically it resembles ductal carcinoma of breast Intraductal components invading surrounding tissues Intra-ductal component of tumor arrange in several forms: cribriform, papillary, solid with comedo-like central necrosis	Non-specific features on CT and MRI but it can show neural and jaw involvement.	Biopsy and histopathological examination
		Squamous cell carcinoma	Malignant	Incidence: rare tumor Age: Old age , 61 to 68 years Gender: Male predilection	Present as painful growing mass on jaw	+	-	Teneder Firm Solitary swelling on jaw	Thinning and discoloration of skin	-	Submandibular gland predilection	Past radiation exposure is a strong risk factor.	Gross: Shows skin tissue and thinning of skin Microscopically: Nest and solid sheets of tumor cells arranged in glandular pattern. It is derived from epidermoid cells of salivary gland. May show vascular invasion and inflammatory infiltrate. Immunohistochemical staining can be used to mark the squamous and keratin component.	Tumor dimension can be delineated using both CT and MRI	Biopsy and histopathological examination
	Parathyroid tumors		Malignant	Incidence: Rare Mean age : 44 to 54 years Gender: Female predilection	Presents with the hyperparathyroidi Tachycardia Weight loss Sweating Neck swelling Bone pains Stomach pain Nausea and vomiting Fatigue Confusion	+	+	Lower neck mass with	Skin stays intact most of the time	-	Labs may show hypercalcemia and its consequences such as pancreatitis and decrease bone density on DEXA scan.	Low TSH Increased T4 and T3 Hypercalcemia	Microscopic findings:Tumor shows trabecular growth pattern with high mitosis and surrounding thick fibrous bands. Capsular involvement and vascular invasion is common	CT and MRI shows more frequent lower lobe involvement, vascular involvement , lymph node metastasis and perineural involvement. Bone scan may show decreasing cone density	Biopsy and histopathological examination
	Carotid body tumors					-	-			-
	Paraganglioma		Benign (Majority) Malignnat (rare)	Mean age:age from 50 to 70 years Gender: More in females	May be an accidental finding depending on their secretory nature may present with following symptoms: Palpitations Tremor Pulse-like vibratory sense Headache Change in voice Vertigo Catecholamine-secreting paragangliomas present with : Hypertension Headache Sweating Tachycardia	-	-	No visible mass as they are located deep in the the neck along the glossopharyngeal and vagal nerves.	skin stays intact and usually is normal	-	Associated with some hereditary syndromes and MEN2B syndrome, Neurofibromatosis type 1 and VHL disease.	Biochemical testing may show catecholamine metabolites in serum or urine samples	These are highly vascular tumors that involves nerves around vessels Gross findings: Fleshy tumors Pink to red brown to gray in color Associated with hemorrhage or fibrosis Microscopic findings: Round or polygonal cells arranged inside capsule in the form of nests or forming trabecular structures. Differentiation between benign or malignancy form is done depending microscopic features of invasion and high mitotic index..	Following imaging techniques can be used to diagnose the tumor: Ultrasound Computed tomography Magnetic resonance imaging As these are secretory tumors further testing with following techniques can confirm diagnoses: Angiography metaiodobenzylguanidine (MIBG) 18F-fluoro-2-deoxyglucose Positron emission tomography (FDG-PET).	Imaging and serum catecholamine analysis
	Schwannoma		Benign	Rare tumor Incidence: 1% to 10%	Slow growing mass presents with the localized neural deficit depending on the site of peripheral nerve involved. Vagal involvement: Hoarseness Dysphagia Sympathetic nerve involvement may present as Horner's syndrome: Dilated pupil Decrease sweating Dropping eye lid Vestibular Schwannoma( most common): hearing impairment	+	+/-	Multiple slow growing nodules on the skin	Noirmal	-	Associated with neurofibromatosis type II. Most common nerve involved in vestibular nerve.	May be normal	It is a peripheral nerve tumor vagus nerve or superior cervical sympathetic chain being most common locations. Histology shows encapsulated neural tissue growth.	Imaging can diagnose the tumor. Its hard to discriminate Carotid body tumor from Schwannoma on CT.MRI and MRI angiography can confirm the diagnoses.	Imaging is used for diagnose
	Lymphoma 7139563		Benign/ malignnat	Age: Predilection for older age Mean age:	Insidious onset slow growing lymph nodes with non-specific systemic B symptoms (fever, night sweats, weight loss) Skin rash Waxing and waning lymphadenopathy Abdominal fullness ( hepatomegaly and spleenomegaly) Infections (cytopenias)				Skin rash and pruritus		Raised LDH levels
	Liposarcoma
	Lipoma
	Glomus vagale, glomus jugulare tumors
	Metastatic head and neck carcinoma
Other	Hematoma
	Arteriovenous fistula
	Goiter
Category	Diseases		Benign	Demography	History	Pain	Dysphagia	Mass exam	Skin changes	LAP	Others	Lab findings	Histopathology	Imaging	Gold standard diagnosis	Associated findings

References

Diseases	Clinical manifestations						Para-clinical findings					Pap Smear	Histopathology	Gold standard	Additional findings
	Symptoms				Physical examination
							Lab Findings			Imaging
	Menorrhagia	Post Menstrual Bleeding	Pelvic Pain	Other symptoms	Pelvic examination	Abdominal examination	Hb	B-HCG	CEA-19	Ultrasound	MRI
Endometrial cancer	+	+					↓		+
Uterine sarcoma	+/-	+					↓		+
Uterine lymphoma	+/-	+/-					↓ or N
Uterine leiomyoma	+/-	+/-					↓ or N
Malignant mixed Mullerian tumour (MMMT) of the uterus	+/-	+/-					↓
Cervical cancer with uterine invasion	+	+					↓
Metastasis to the uterus from a non-gynaecologcial malignancy	+	+					↓
Endometrial polyp	+	+					↓		+ or N
Endometrial hyperpalsia	+	+					↓		+
Uterine adenomyoma	-	-					↓		+
Hematometra	-	-					↓		+
Gestational trophoblastic disease
Incomplete abortion
Fetus	No Menstrual cycle	+/-							-

Diseases	Clinical manifestations						Para-clinical findings							Gold standard	Additional findings
	Symptoms			Physical examination
							Lab Findings			Imaging			Histopathology
	Symptom 1	Symptom 2	Symptom 3	Physical exam 1	Physical exam 2	Physical exam 3	Lab 1	Lab 2	Lab 3	Imaging 1	Imaging 2	Imaging 3
Uterine cancer
Uterine sarcoma
Infection
Diseases	Symptom 1	Symptom 2	Symptom 3	Physical exam 1	Physical exam 2	Physical exam 3	Lab 1	Lab 2	Lab 3	Imaging 1	Imaging 2	Imaging 3	Histopathology	Gold standard	Additional findings
Abscess
Septic emboli
Fungi
Differential Diagnosis 1
Differential Diagnosis 2
Differential Diagnosis 3
Diseases	Symptom 1	Symptom 2	Symptom 3	Physical exam 1	Physical exam 2	Physical exam 3	Lab 1	Lab 2	Lab 3	Imaging 1	Imaging 2	Imaging 3	Histopathology	Gold standard	Additional findings
Differential Diagnosis 4
Differential Diagnosis 5
Differential Diagnosis 6

Table for Differential Diagnosis of Small Intestine Cancer

ABBREVIATIONS:

N/A: Not available, NL: Normal,