Mystery Cases

Revised: 16 November 2017, last major update November 2017

Copyright: (c) 2012-2017, PathologyOutlines.com, Inc.

16 November 2017

Kidney tumor - Mucinous tubular and spindle cell carcinoma


1 November 2017

Skin - Hailey-Hailey disease (HHD)


16 October 2017

Placenta - Exaggerated placental site


2 October 2017

Lung tumor - Epithelial myoepithelial carcinoma


15 September 2017

Lymph node - Diffuse large B cell lymphoma - T cell / histiocyte rich (THRLBCL)


15 August 2017

Lung nontumor - Hypersensitivity pneumonitis


1 August 2017

Kidney tumor - Hereditary Leiomyomatosis and Renal Cell Carcinoma (HLRCC) syndrome associated renal cancer


17 July 2017

Heart - Kaposiform hemangioendothelioma


30 June 2017

Kidney - Metanephros (embryology)


15 June 2017

Heart - Leiomyosarcoma


2 June 2017

Eye (lid) - Kaposi sarcoma


15 May 2017

Esophagus - granular cell tumor


1 May 2017

Ear - middle ear adenoma


18 April 2017

Appendix - Enterobius vermicularis


3 April 2017

Adrenal gland - solitary fibrous tumor


15 March 2017

Prostate - embryonal rhabdomyosarcoma


1 March 2017

Hematology - crystal storing histiocytosis


17 February 2017

Lung tumor - hamartoma


1 February 2017

Urethra - squamous cell carcinoma


16 January 2017

Vagina - clear cell adenocarcinoma


2 January 2017

Uterus - EIN


15 December 2016

CNS tumor - anaplastic meningioma


1 December 2016

Skin - acquired tufted angioma


15 November 2016

Colon - angiosarcoma


1 November 2016

Ovary - clear cell carcinoma


17 October 2016

Thyroid - non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP)


4 October 2016

Muscle - polymyositis


16 September 2016

CNS nontumor - alcoholic cerebellar degeneration


7 September 2016

Breast nonmalignant - adenomyoepithelioma


15 August 2016

Skin-nonmelanocytic tumor - seborrheic keratosis


4 August 2016

Mandible-maxilla - ameloblastoma


15 July 2016

Chronic myeloid neoplasms - chronic myelomonocytic leukemia (CMML)


7 July 2016

Cervix - endocervical glandular dysplasia


15 June 2016

Bone marrow - leishmania


1 June 2016

Bone - clear cell chondrosarcoma


16 May 2016

Bladder - papillary urothelial neoplasm of low malignant potential


1 May 2016

Ampulla - mixed adenoneuroendocrine carcinoma


March 2016

Kidney - light chain deposition disease


February 2016

Breast - sclerosing lobular hyperplasia


January 2016

Liver - Total parenteral nutrition (TPN) related liver disease


December 2015

Testis - Aggressive angiomyxoma


November 2015

Colon tumor - Cronkhite-Canada syndrome


October 2015

Heart - right atrium - normal paraganglial cells


August 2015

CNS - Carbon Monoxide injury


July 2015

Skin - Chondroid syringoma


June 2015

Kidney tumor - Rhabdoid variant of renal cell carcinoma


May 2015

Adrenal Gland - Ganglioneuroblastoma


April 2015

Soft tissue - Nodular fasciitis


March 2015

Salivary glands - Polymorphous low grade adenocarcinoma


February 2015

Vulva - Merkel cell carcinoma


January 2015

Stomach - Giardiasis


November 2014

Prostate - Clear cell adenocarcinoma


October 2014

Soft tissue (breast) - Glomus tumor


September 2014

CNS - Progressive multifocal leukoencephalopathy (PML)


August 2014

Pancreas - Nesidioblastosis


July 2014

Ovary - Sex cord tumor with annular tubules


June 2014

Lymph node - sarcoidosis


May 2014

Peritoneum - endosalpingiosis


April 2014

Testis - desmoplastic small round cell tumor


February 2014

Vulva - aggressive angiomyxoma


December 2013

Heart - myxoma


November 2013

Fallopian tube - adenomatoid tumor


October 2013

Eye - conjunctiva: Spindle cell carcinoma, with deep scleral and corneal invasion


September 2013

Esophagus: Barrett esophagus


August 2013

Lymph Node: HIV lymphadenitis


July 2013

Soft tissue: Proliferative myositis


June 2013

Thyroid: Hashimoto's thyroiditis-clear cell change


May 2013

CNS: pleomorphic xanthoastrocytoma


April 2013

Thyroid: lithium thyroiditis


February 2013

Nasopharynx: Warthin's tumor


January 2013

Liver: atypical mycobacteria in HIV+ man


December 2012

Pancreas: Solid-Pseudopapillary Tumor


November 2012

Appendix: Enterobius


October 2012

Breast: apocrine DCIS


September 2012

Kidney: membranous glomerulonephritis


August 2012

Prostate: postoperative spindle cell nodule


July 2012

Ureter: carcinoma in situ (arrow points to adjacent denuded urothelium)


June 2012

Soft tissue: sclerosing epithelioid fibrosarcoma


May 2012

Prostate: atrophy


April 2012

Kidney: congenital mesoblastic nephroma


March 2012

B cell prolymphocytic leukemia


February 2012

Uterus: endometrial stromal sarcoma


January 2012

Testis: Leydig cell tumor


November 2011

Ovary: hyperreactio luteinalis


September 2009

Acute myeloid leukemia


July 2009

Soft tissue: elastofibroma


January 2009

Skin: Spitz nevus


September 2008

Breast: myofibroblastoma


May 2008

Thyroid gland: hyalinizing trabecular neoplasm