[James Calum]

I'll do this Season by Season, listing the full name of the POTW (if known), age (if given) and final diagnosis. Part of the info you only get from screencaps and/or the scripts/transcripts. Here's the list for Season 7:

7x1 - Dr. Richardson, food poisoning (toad eggs)
7x2 - Della Carr (14), sickle cell trait
7x3 - Alice Tanner (Helen Rutherford) (50), hypothyroidism, syringomyelia
7x4 - Margaret (Jenny) McPherson (30), schizophrenia drug related interaction
7x5 - Kayla & Abbey Grogan (44), melanoma, lung cancer, pulmonary embolism
7x6 - Senator Harold "Hal" Anderson (42) & Joe Dugan (40ies), Hep C
7x7 - Julie (12) & Niles (40ies), rickettsial pox
7x8 - Ramon Silva (33), rhodococcus equi infection, malnutrition, MS Marburg variant
7x9 - Jack Nash (~35), chicken pox
7x10 - Burton Driscoll (38) & Landon Parks, variegate porphyria
7x11 - Arlene Cuddy (65), metalosis, cobalt poisoning
7x12 - Nadia Romanovich (33), McLeod syndrome, OCD
7x13 - Phillip Wright (20ies), swallowed pea that got into the airway
7x14 - Bert Vesky (35 - 39), Muckle-Wells syndrome, CAPS
7x15 - Dr. Lisa Cuddy & Ryan (16), oncocytoma & staph abscess
7x16 - Lane Curtis (25), bartonella infection, mycotic aneurysm in the aortic wall
7x17 - "Danny Jennings" ("Peter Johnson") (23), adult Refsum disease
7x18 - Nina & Bryan Darvey (36), Ehlers-Danlos syndrome, Q-fever
7x19 - Kendall Pearson (16), lymphoid sarcoma
7x20 - Cyrus Harry (~45), teratoma
7x21 - Dr. Wendy Lee (35 - 39) & Terry Foley (20ies), cnatharidin poisoning & glomus tumor
7x22 - Darrien McCurdy & Dr. Gregory House, parasitic granuloma (entamoeba) & small tumors in regrown muscle from experimental drug
7x23 - Afsoun Hamidi (40ies), Wegener's granulomatosis