The Juan Rosai Collection

Desmoplastic malignant melanoma (Skin (arm)) [1125/1]

Dermatofibrosarcoma protuberans (Skin (hip)) [1125/2]

Called adenoid basal cell carcinoma (it looks like basaloid carcinoma/ malignant adnexal tumor to me) (Skin (scalp)) [1125/3]

Called proliferating tricholemmal cyst (it looks to me like it has sebaceous differentiation) (Skin (scalp)) [1125/4]

Called superficial malignant fibrous histiocytoma (it looks like a recurrent squamous cell carcinoma to me) (Skin (scalp)) [1125/5]

Called atypical fibroxanthoma (it looks like a melanoma with myxoid areas to me, good theques) (Skin (cheek)) [1125/6]

Nodular hydradenoma (eccrine ascrospiroma) (Skin (wrist)) [1125/7]

Fibrous hamartoma of infancy (Soft tissue, axilla) [1125/8]

Granular cell tumor (Skin (shoulder)) [1125/9]

Nevus sebaceous of Jadassohn (Skin (forehead)) [1125/10]

Merkel cell tumor (Skin) [549/1]

Xanthoma tuberosum (Skin) [549/2]

Sweat gland tumor (Skin) [549/3]

Sweat gland tumor (Skin) [549/4]

Hemangioma (Skin) [549/5]

Sebaceous tumor (Skin) [549/6]

Kaposi's sarcoma (Skin) [549/7]

Sebaceous tumor (Skin) [549/8]

Paget's disease (Skin) [549/9]

Sweat gland tumor (Skin) [549/10]

Sweat gland tumor (Skin) [549/11]

Leiomyosarcoma (Skin) [549/12]

Tuberous xanthoma (Skin) [1142/1]

Leiomyosarcoma (Skin) [1142/2]

Metastatic melanoma (Lymph node (inguinal)) [1142/3]

Pigmented sweat gland carcinoma (Skin (breast)) [1142/4]

Spindle cell melanoma (vs MPNST) (Soft tissue (neck)) [1142/5]

Pigmented dermatofibrosarcoma protuberans (Bednar tumor) (Skin) [1142/6]

Paget's disease (Anus) [1142/7]

Adenoid (acantholytic) squamous cell carcinoma (vs sweat gland carcinoma) (recurrent) (Skin (forehead)) [1142/8]

Spindle cell carcinoma It looks like a skin adnexal carcinoma to me (Skin (forehead)) [1142/9]

Diagnosed as Hemangiopericytoma It could be a malignat form of solitary fibrous tumor - CD34+) (Skin (scalp)) [1142/10]

Extramammary Paget's disease, skin (Skin, groin area) [1472/1]

Sweat gland carcinoma, clear cell type (malignant eccrine acrospiroma) (Base of penis) [1472/2]

Proliferating pilar cyst (Back of neck) [1472/3]

Mucinous (adenocystic) carcinoma (Skin of right cheek) [1472/4]

Apocrine gland adenoma (Axilla) [1472/5]

Adnexal carcinoma, probably sebaceous gland origin (Skin of sacral area) [1472/6]

Chondroid syringoma (Skin of nose) [1472/7]

Dermal eccrine cylindroma (Skin from anterior chest) [1472/8]

Trichoepithelioma (Left thigh) [1472/9]

Pigmented basal cell carcinoma (Scalp) [1472/10]

Eccrine spiradenoma (Left thigh) [1472/11]

Sweat gland carcinoma, probably eccrine (Right foot) [1472/12]

unknown (Skin, right cheek) [1472/13]

unknown (Plantar surface, right foot) [1472/14]

unknown (Left thumb) [1472/15]

unknown (Skin, right chest wall) [1472/16]

unknown (Skin of neck) [1472/17]

unknown (Skin, dorsum of left foot) [1472/18]

unknown (Right cheek) [1472/20]

unknown (Back) [1472/21]

unknown (Abdominal tumor at autopsy (cfr. case 21)) [1472/22]

unknown (Skin of upper neck) [1472/23]

unknown (Scalp) [1472/24]

unknown (Cheek) [1472/25]

Bowen's disease (Skin) [51/1]

Queyrat's erythroplasia (Penis) [51/2]

Paget's disease (Skin) [51/3]

Basal cell carcinoma (Skin) [51/4]

Dermatofibrosarcoma protuberans (Skin) [51/5]

Pigmented nevus (Skin) [51/6]

Actinic keratosis (Skin) [51/7]

Verruca vulgaris (Skin) [51/8]

Necrobiosis lipoidica (Skin) [51/9]

Granuloma annulare (Skin) [51/10]

Erytema nodosum (Skin) [51/11]

Granuloma faciale (Skin) [51/12]

Ichthyosis (Skin) [51/13]

Chromoblastomycosis (Skin) [51/14]

Pemphigus (Skin) [51/15]

Leukemia (Bone) [309/1]

Dermatitis (Skin) [309/3]

Maligant fibrous histiocytoma (Soft tissues) [309/5]

Extraskeletal chondrosarcoma (Soft tissues) [309/6]

Nodular fasciitis (Soft tissues) [309/7]

Angiosarcoma (Skin) [309/8]

Trichofolliculoma (Skin, scalp) [1194/1]

Trichoblastoma (Skin, leg) [1194/2]

Pilar tumor It looks clearly malignant to me (Skin, nape of neck) [1194/3]

Martrical carcinoma (malignant hair follicle/ pilar tumor) (Skin, chest wall) [1194/4]

Sebaceous carcinoma (Skin, flank) [1194/5]

Apocrine (?) syringofibroadenoma (Skin, arm) [1194/6]

Erythema elevatum diutinum (Skin, foot) [1194/7]

Spider bite (? Brown recluse) (Skin, arm) [1194/8]

Marginal zone lymphoma (versus cutaneous lymphoid hyperplasia) (Skin, thigh) [1194/9]

Mycosis fungoides (Skin) [1194/10]

Cellular blue nevus (Skin, foot dorsum) [1194/11]

Spitz nevus (Skin, face) [1194/12]

Spiz nevus with halo reaction (Skin, ear) [1194/13]

Desmoplastic melanoma (skin, scalp) [1194/14]

Spindle squamous cell carcinoma (Skin, eyebrow & eyelid) [1194/15]

Malignant histiocytoma/ Atypical fibroxanthoma/ Sarcoma-like tumor of the skin (Skin, scalp) [1194/16]

Leiomyosarcoma (Skin, arm) [1194/17]

Infantile myofibroma (Skin, hip) [1194/18]

Called epithelioid hemangioendothelioma It looks like Kaposi sarcoma to me (Skin, leg (ankle)) [1194/19]

Called glomangiomyoma It looks like a glomangioma in this section (Skin, thigh) [1194/20]

Sebaceous tumor (Skin) [194/1]

Urticaria pigmentosa (Skin) [194/2]

Zirconium granuloma (Skin) [194/3]

Granuloma annulare (Skin) [194/6]

Pemphigus (Skin) [194/9]

Keratoacanthoma (Skin) [142/2]

Vascular tumor (including glomus - hemangiopericytoma) (Skin) [142/5]

Fibrous xanthoma (Skin) [142/6]

Mesenchymoma (Soft tissues) [142/9]

Hodgkin's disease (Lymphnodes) [142/11]

Leiomyoblastoma (Stomach) [142/13]

Carcinoid tumor (Appendix) [142/14]

Cloacogenic (basaloid) carcinoma (Anus) [142/15]

Tailgut cyst (Peritoneum - sacrococcygeal region) [142/16]

Fibro-epithelioma (of Pinkus) (Right flank) [1495/2]

Partially differentiated squamous cell carcinoma (Ear) [1495/3]

Keratoacanthoma (Lesion, left wrist) [1495/4]

Intra-epidermal squamous cell carcinoma (Perineum) [1495/5]

Tricho-epithelioma (Face) [1495/6]

Cylindroma (cylindromatous syringo-adenoma) (Mass beneath angle of mandible) [1495/7]

Extra mammary Paget's disease (Right labium majus) [1495/8]

Nodular hidradenoma (Left forearm) [1495/9]

malignant tumor,unclassified (Skin of back) [1495/10]

Papillary syringadenoma (of Werther) with in situ adenocarcinoma (Scalp) [1495/11]

Basal cell carcinomas (Skin, posterior left ear) [1495/12]

Invasive syringo-epithelioma (for want of a better term) (Nipple, right breast) [1495/13]

Granular cell 'myoblastoma' (Lesion, right leg) [1495/14]

Lymphosarcoma (Vertex of scalp) [1495/15]

Lymphosarcoma of skin and parotid gland (Skin of forehead and right parotid gland) [1495/16]

Hodgkin's disease of the skin (mycosis fungoides) (Skin of leg) [1495/17]

Dermatofibrosarcoma protuberans (progressive recurrent dermatofibroma) (Skin of back) [1495/18]

Letter-Siwe's disease (malignanty histiocytosis) (Scalp and abdomen (autopsy)) [1495/19]

Urticaria pigmentosa (Lesions on back and neck) [1495/20]

Pigmented nevus with junctional proliferation (Pigmented lesion of skin, right knee) [1495/21]

Juvenile melanoma (spindle cell nevus) (Lesion, right cheek) [1495/22]

Pigmented nevus (Pigmented lesion on breast) [1495/23]

Cellular blue nevus (Buttocks) [1495/24]

Pigmented squamous cell carcinoma (Skin, pretibial region) [1495/25]

Unclassified tumor (Skin) [160/12]

Pilosebaceous carcinoma (Back) [1466/1]

Paget's disease of the skin (extra-mammary) Lichen planus-like dermatitis (Vulva) [1466/2]

Hodgkin's sarcoma (Right thigh) [1466/3]

Nevus sebaceus of jadassohn; syringocystadenoma papilliferum; syringoma; superficial basal cell carcinoma (Left posterior scalp) [1466/4]

Well diffrentiated mucinous adenocarcinoma of the skin (Anterior abdominal wall) [1466/5]

Poorly differentiated basal cell carcinoma (Left forehead) [1466/6]

Proliferating pilar tumor (Left parietal area) [1466/7]

Sclerosing hemangioma (Right leg) [1466/8]

Eccrine spiradenoma (Skin, forearm) [1466/9]

Metatstatic clear cell carcinoma (clear cell variant of renal carcinoma) (Parieto-occipital area) [1466/10]

Atypical fibroxanthoma (poorly differentiated spindle cell type) (Chest wall) [1466/11]

Carcinoma-in-situ (Bowen's disease) (Vulva) [1466/12]

Malignant eccrine spiradenoma (Left posterior cervical chain) [1466/13]

Benign lymphocytoma of the skin (Skin, left thigh) [1466/14]

Dermatofibrosarcoma protuberans (Axilla) [1466/15]

Lymphangiosarcoma of the scalp (Scalp) [1466/16]

Malignant neuroma (malignant epithelioid schwannoma) (Left temple) [1466/17]

Atypical fibroxanthoma (Forehead) [1466/18]

Melanocytic angiofibroma (Nose) [1466/19]

Epidermoid carcinoma (Right hand) [1466/20]

Angioblastic mesoblastoma (Suprapubic area) [1466/21]

Angioblastic mesoblastoma (Suprapubic area) [1466/22]

Glomus tumor (Right elbow) [1466/23]

Fibrolipoma (Neck) [1466/24]

Clear cell carcinoma (probably of sweat gland origin) (Base of penis) [1466/25]

Seborrheic keratosis (Skin) [11/1]

Inverted follicular keratosis (Skin) [11/2]

Inverted follicular keratosis (Skin) [11/3]

Sebaceous tumor (Skin) [11/5]

Malignant melanoma (Skin) [11/10]

Pigmented nevus (Skin) [11/11]

Pigmented nevus (Skin) [11/12]

Pyogenic granuloma (Skin) [11/13]

Vascular tumor (including glomus - hemangiopericytoma) (Skin) [11/14]

Vascular tumor (including glomus - hemangiopericytoma) (Skin) [11/15]

Neurofibroma (Soft tissues) [11/16]

Fibrous xanthoma (Skin) [11/17]

Pilomatrixoma (Skin) [11/18]

Lupus erythematosus (Skin) [11/20]

Leprosy (Skin) [11/21]

Granuloma annulare (Skin) [11/22]

Granuloma annulare (Skin) [11/23]

Weber-Christian's disease (Skin) [11/24]

Pilar cyst (Skin (scalp)) [1153/1]

Eccrine spiradenoma (with marked myxoid changes) (Skin (calf)) [1153/2]

Aggressive digital papillary adenocarcinoma (of sweat gland origin) (Skin (finger)) [1153/3]

Called neurocristic hamartoma Looks like Helwig's blue melanoma to me (Skin (scalp)) [1153/4]

Blue nevus (skin (scalp)) [1153/5]

Malignant melanoma (anus) [1153/6]

Spindle cell melanoma (Skin (shoulder)) [1153/7]

Eccrine dermal cylindroma (Skin (shoulder)) [1153/8]

Myxoid neurofibroma (with reactive changes resembling decubitus atypical fibroplasia) (skin (shoulder)) [1153/9]

Called atypical fibroxanthoma vs primary or metastatic giant cell carcinoma (Skin, eye (eyebrow)) [1153/10]

Trichofolliculoma (skin) [1015/1]

Trichoblastoma, large nodular type (skin) [1015/2]

Proliferating follicular-cystic neoplasm Proliferating pilar tumor Proliferating pilar cyst (skin) [1015/3]

Matrical carcinoma (skin) [1015/4]

Sebaceous carcinoma (Skin, eye) [1015/5]

Syringofibroadenoma with ductal (?apocrine) and follicular germinative differentiation (skin) [1015/6]

Erythema elevatum diutinum, late nodular lesion (skin) [1015/7]

Spider bite, alegedly brown recluse (Loxosceles reclusa) (skin) [1015/8]

Marginal zone lymphoma (immunocytoma) (skin) [1015/9]

Mycosis fungoides with pseudocarcinomatous epithelial hyperplasia (skin) [1015/10]

Blue nevus (cellular or spindle fascicular type) (skin) [1015/11]

Spitz nevus (skin) [1015/12]

Spitz nevus with a halo reaction (skin) [1015/13]

Desmoplastic melanoma (skin) [1015/14]

Spindle cell (desmoplastic) squamous cell carcinoma (Skin) [1015/15]

Atypical fibroxanthoma (superficial malignant fibrous histiocytoma) (skin) [1015/16]

Cutaneous leiomyosarcoma (skin) [1015/17]

Infantile myofibroma (skin) [1015/18]

Epitheliois hemangioendothelioma (skin) [1015/19]

Glomangiomyoma (skin) [1015/20]

Schistosomiasis (Skin) [236/1]

Malignant melanoma (Skin) [236/3]

Scleroderma & porphyria (Skin) [236/5]

Sweat gland tumor (Skin) [236/6]

Dermatofibrosarcoma protuberans (Skin) [236/7]

Dermatofibroma (fibrous histiocytoma) (Skin) [236/8]

Malignant lymphoma (Skin) [236/9]

Atypical fibroxanthoma (Skin) [236/11]

Sebaceous tumor (Skin) [93/2]

Juvenile xanthogranuloma (Skin) [93/3]

Xanthoma tuberosum (Skin) [93/4]

Bowen's disease (Skin) [93/5]

Paget's disease (Breast) [93/7]

Bromoderma (Skin) [93/8]

Mycosis fungoides (Skin) [93/9]

Malignant melanoma (Skin) [93/10]

Pigmented nevus (Skin) [93/11]

Vascular tumor (including glomus - hemangiopericytoma) (Skin) [93/12]

Vascular tumor (including glomus - hemangiopericytoma) (Skin) [93/13]

Pilomatrixoma (Skin) [93/16]

Basal cell carcinoma (Skin) [93/17]

Keratoacanthoma (Skin) [93/18]

Mastocytosis (Skin) [340/1]

Dermatitis (Skin) [340/2]

Bowen's disease (Skin) [340/3]

Leprosy (Skin) [340/4]

Leprosy (Skin) [340/5]

Ulcerative colitis (Large bowel) [340/9]

Seborrheic keratosis (Skin) [52/1]

Bowen's disease (Skin) [52/2]

Malignant lymphoma (Skin) [52/3]

Leukemia (Skin) [52/4]

Fibrous xanthoma (Skin) [52/7]

Vascular tumor (including glomus - hemangiopericytoma) (Skin) [52/8]

Basal cell carcinoma (Skin) [52/9]

Vascular tumor (including glomus - hemangiopericytoma) (Skin) [52/10]

Epithelial nevus (Skin) [52/11]

Pigmented nevus (Skin) [52/12]

Pigmented nevus (Skin) [52/13]

Malignant melanoma (Skin) [52/14]

North American blastomycosis (Skin) [52/15]

Vascular tumor (including glomus - hemangiopericytoma) (Skin) [52/16]