WSI21-143

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Request type Study

Subspecialty Dermatopathology

Set MAI Derm Path Study Set

Topic Mimicry in Melanocytic Lesions

Presenter Hoang, Mai P.,MD

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Case	Clinical history	Requester	Diagnosis
Case	Clinical history	Requester	Diagnosis
Case 1	A 34-year-old female presented with a pink/tan dome shaped lesion with slightly irregular borders on her left leg Anna Harris • Martin C. Mihm Jr. and Alireza Sepehr	null	Spitzoid melanoma versus Spitz nevus
Case 2	A 69 year old female developed a progressively enlarging mass on the back of the leg. Travis Hollmann and Jason Hornick	null	Epithelioid malignant peripheral nerve sheath tumor versus melanoma
Case 3	A 60 year-old man presented with a small pigmented lesion on his left vertex scalp Katy R Linskey and Rosalynn M. Nazarian	null	Melanoma regression versus halo nevus
Case 4	A 25 year-old pregnant woman presented with a lesion on her left inner thigh Alice Z. C. Lobo • Maria Cecilia Lezcano and Adriano Piris	null	Dermal nevus with mitoses versus nevoid melanoma
Case 5	A 96 year-old female presented with a 10mm • brown-black and irregular plaque on her left arm Anna Harris and Alireza Sepehr	null	Desmoplastic melanoma versus sclerosing nevus
Case 6	A 41-year-old male presented with a scalp lesion George Lin and Mei-Yu Hsu	null	Amelanotic blue nevus versus dermatofibroma
Case 7	A 27 year-old woman presented with a longstanding nodule on the lower back Jennifer Kaplan and Steven R. Tahan	null	Cellular blue nevus versus malignant melanoma arising in a blue nevus
Case 8	A 16 year-old girl presented with an intermittently itchy right nasolabial fold mole Devon Gimbel and Lyn M. Duncan	null	Recurrent nevus phenomenon versus melanoma with regression
Case 9	Sentinel lymph node biopsy in a 72 year-old male with a history of melanoma Gabrielle Baker and Lyn M. Duncan	null	Nevus cell nests versus nodal micrometastases
Case 10	A 47 year-old woman with a history of melanoma on her left forearm • presented with a new pigmented lesion on her left lateral thigh May P. Chan and Beverly E. Faulkner-Jones	null	Melanoma with senescence-like changes versus nevus with senescent change
Case 11	A 37 year old male presented with a pigmented lesion on the left chest wall Andrea Boni • Martin C. Mihm Jr. and Adriano Piris	null	Deep penetrating nevus versus nodular melanoma
Case 12	A 64 year old male presented with a new growth on the left forearm Jaime Vanourny and Vincent Liu	null	Epithelioid amelanotic melanoma versus carcinoma
Case 13	A 53 year old male presented with a papule on the tip of the nose John P. Dekker • Martin C. Mihm Jr. and Mai Hoang	null	Cellular neurothekeoma versus melanoma
Case 14	A 51 year old woman presented with multiple pigmented lesions near scar site of prior melanoma Johanna Baran and Mai Hoang	null	Epidermotropic metastasis versus primary melanoma
Case 15	A 16 year old male presented for cosmetic management of an 8-cm congenital nevus involving his right face Olga Kolman • Martin C. Mihm Jr. and Mai Hoang	null	Congenital nevus with benign versus atypical proliferative nodule
Case 16	A 82 year-old male presented with a growing lesion in front of his right ear Kevin Masami Kitagawa and M. Angelica Selim	null	Desmoplastic melanoma versus scar
Case 17	A 30-year old male presented with a right leg skin lesion Leona Doyle and Mei-Yu Hsu	null	Spindle cell melanoma versus sarcomatoid carcinoma/atypical fibroxanthoma
Case 18	A 35 year old pregnant woman presented with enlarging nevus on her neck May P. Chan and Steven R. Tahan	null	Benign nevus in pregnancy versus nevoid melanoma
Case 19	A 24-year-old female presented with multiple nevi in the head and neck region Elgida Radoncipi Volpicelli • Alvaro C. Laga and George F. Murphy	null	Epithelioid cell changes of youth versus true dysplasia
Case 20	A 76 year-old man presented with multiple • irregularly shaped and pigmented lesions on her trunk Christine G. Lian • Alvaro C. Laga and George F. Murphy	null	Dysplastic nevus versus lentiginous melanoma