Thymoma differential diagnosis: Difference between revisions
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* '''Thymic masses''' | * '''Thymic masses''' | ||
:* Thymic Cyst: It is incidental mass that may be congenital or acquired. It might contain [[parathyroid]] or salivary tissue, as they has a common embryological origin. | :* [[Cyst|Thymic Cyst]]: It is incidental mass that may be congenital or acquired. It might contain [[parathyroid]] or salivary tissue, as they has a common embryological origin. | ||
:* Thymic | :* Thymic [[hyperplasia]]: Resected only if associated [[paraneoplastic syndrome]]. | ||
:* Thymolipoma: Increased thymic size with mixed [[adipose tissue]]. | :* Thymolipoma: Increased thymic size with mixed [[adipose tissue]]. | ||
:* [[Thymic cancer|Thymic carcinoma]]: Rare thymic tumor, poor survival rate, high rate of recurrence. Sometimes called type C thymoma. | :* [[Thymic cancer|Thymic carcinoma]]: Rare thymic tumor, poor survival rate, high rate of recurrence. Sometimes called type C thymoma. | ||
:* Thymic [[ | :* Thymic [[carcinoid]]: Also called thymic neuroendocrine tumors, uncommon and present as a mass in the anterior mediastinum. | ||
:* Ectopic [[parathyroid]] tissue. | :* Ectopic [[parathyroid]] tissue. | ||
* '''Germ cell tumors''' | * '''Germ cell tumors''' | ||
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:* [[Dermoid cyst]]s: Very rare tumor, only 118 cases have been reported.<ref name="Ripa-1992">{{Cite journal | last1 = Ripa | first1 = LW. | title = Rinses for the control of dental caries. | journal = Int Dent J | volume = 42 | issue = 4 Suppl 1 | pages = 263-9 | month = Aug | year = 1992 | doi = | PMID = 1399044 }}</ref> | :* [[Dermoid cyst]]s: Very rare tumor, only 118 cases have been reported.<ref name="Ripa-1992">{{Cite journal | last1 = Ripa | first1 = LW. | title = Rinses for the control of dental caries. | journal = Int Dent J | volume = 42 | issue = 4 Suppl 1 | pages = 263-9 | month = Aug | year = 1992 | doi = | PMID = 1399044 }}</ref> | ||
:* Malignant germ cell tumor: 90% of malignant mediastinal germ cell tumor occur in males. Full physical examination and scrotal ultrasound is required. | :* Malignant germ cell tumor: 90% of malignant mediastinal germ cell tumor occur in males. Full physical examination and scrotal ultrasound is required. | ||
:* Seminomas: Slightly more common, grow slowly but might reach large sizes. | |||
:* Non-seminomatous germ cell tumor: Consists of [[yolk sac tumor]], embryonal cell carcinoma, and/or [[choriocarcinoma]]. Commonly between 20-40 years of age. | |||
Revision as of 19:21, 21 September 2015
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Amr Marawan, M.D. [2]
Differential Diagnosis
Differential diagnosis of thymomas types A, AB, B and thymic carcinomas.[1]
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Thymoma must be differentiated from other diseases such as:
- Thymic masses
- Thymic Cyst: It is incidental mass that may be congenital or acquired. It might contain parathyroid or salivary tissue, as they has a common embryological origin.
- Thymic hyperplasia: Resected only if associated paraneoplastic syndrome.
- Thymolipoma: Increased thymic size with mixed adipose tissue.
- Thymic carcinoma: Rare thymic tumor, poor survival rate, high rate of recurrence. Sometimes called type C thymoma.
- Thymic carcinoid: Also called thymic neuroendocrine tumors, uncommon and present as a mass in the anterior mediastinum.
- Ectopic parathyroid tissue.
- Germ cell tumors
The most common site of extragonadal germ cell tumors is the mediastinum.
- Teratomas: Represents two thirds of mediastinal germ cell tumor. Usually benign, but when malignant, it's very aggressive and very poor prognosis.
- Dermoid cysts: Very rare tumor, only 118 cases have been reported.[2]
- Malignant germ cell tumor: 90% of malignant mediastinal germ cell tumor occur in males. Full physical examination and scrotal ultrasound is required.
- Seminomas: Slightly more common, grow slowly but might reach large sizes.
- Non-seminomatous germ cell tumor: Consists of yolk sac tumor, embryonal cell carcinoma, and/or choriocarcinoma. Commonly between 20-40 years of age.
- Lymphoma (terrible, could be middle or posterior mediastinal too)
Nodular sclerosing Hodgkin’s lymphoma and primary mediastinal B-cell lymphoma are the two common types that present in the mediastinum. Usually has systemic symptoms as fever weight loss and night sweats and may also have other symptoms as chest pain, wheezing, dyspnea or superior vena cava syndrome.
- Thyroid (intrathyroid goitre)
Presents with shortness of breath or dysphagia.